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-
- Description:
- There have been numerous studies that have aimed at improving the low tensile strength, stiffness, and toughness of cementitious materials. This study aims to show that all of these characteristics can be greatly improved by the addition of ladder scale reinforcement at the nano and micro scale. Carbon nanofibers (CNFs)...
- Keyword:
- nanofiber reinforcement, mechanical properties, carbon nanofibers, hybrid composites, polyvinyl alcohol microfibers, and scanning electron microscopy
- Creator:
- Surendra P. Shah, Zoi S. Metaxa, and Maria S. Konsta-Gdoutos
- Owner:
- Chris Diaz
- Date Uploaded:
- 08/14/2017
- Date Modified:
- 08/17/2017
- Date Created:
- 2011
- Resource Type:
- Article
-
- Keyword:
- crack response and vibration-induced cracking
- Creator:
- Charles H. Dowding
- Owner:
- Chris Diaz
- Date Uploaded:
- 08/14/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2001
- Resource Type:
- Article
-
- Description:
- Concern over construction vibration-induced cracking has led to development of a new approach to vibration monitoring called autonomous crack measurement (ACM) and illustrated in Figure 1. This paper describes the concept as well as sensor performance in the first test house fitted an ACM system. Response of three cracks in...
- Keyword:
- concrete masonry unit
- Creator:
- Charles H. Dowding and Michael Louis
- Owner:
- Chris Diaz
- Date Uploaded:
- 08/14/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2003
- Resource Type:
- Article
-
- Description:
- This paper summarizes micro-inch response of cosmetic cracks in a typical slab-ongrade ranch style house to both construction equipment-induced vibration and environmental (weather) effects. This structure was instrumented, and its response studied as part of the development of an Autonomous Crack Measurement (ACM) system. ACM systems are intended to record...
- Keyword:
- Autonomous Crack Measurement
- Creator:
- Charles H. Dowding and Mickey L. Snider
- Owner:
- Chris Diaz
- Publisher:
- American Society of Civil Engineers
- Date Uploaded:
- 08/14/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2004
- Resource Type:
- Part of Book
-
- Description:
- Carbonation, a neutralizing reaction in cement paste, can be used to date cracks in cementitious materials. Currently, comparison between two cracks is the only method available to predict a relative age with carbonation. These two crack studies require a crack of known age in a similar material with similar exposure...
- Keyword:
- civil engineering
- Creator:
- Laura E. Sullivan-Green
- Owner:
- Chris Diaz
- Date Uploaded:
- 08/14/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2005-03
- Resource Type:
- Masters Thesis
-
- Description:
- Blasting and climatological response of cracks are compared for structures constructed of concrete block typical of home construction in Europe. While much has been written comparing micrometer crack response of wood frame structures typical of residential construction in North America, little has been written concerning response of structures more typical...
- Keyword:
- vibration and climatological crack
- Creator:
- Charles H. Dowding
- Owner:
- Chris Diaz
- Date Uploaded:
- 08/14/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2007
- Resource Type:
- Research Paper
-
- Description:
- Surveillance of large geotechnical projects requires autonomous collection of data from a wide range of instrument types. An equally large range of data formats are employed by these measurement systems. A data exchange protocol is needed to make field data available for interpretation on a variety of platforms. This paper...
- Keyword:
- infrastructure
- Creator:
- David E. Kosnik
- Owner:
- Chris Diaz
- Date Uploaded:
- 08/14/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2007
- Resource Type:
- Research Paper
-
- Description:
- Cracking is one of the most common concerns cited by owners of structures adjacent to construction or mining blasting. While a large database of case studies documenting the relative insignificance of ground motion induced by responsible blasting compared to weather effects on cracks in nearby structures has been established, the...
- Keyword:
- Autonomous Crack Measurement
- Creator:
- Charles H. Dowding and Jeffrey E. Meissner
- Owner:
- Chris Diaz
- Date Uploaded:
- 08/14/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2011
- Resource Type:
- Research Paper
-
- Description:
- A study is conducted to determine the effects on the early hydration kinetics and compressive strength by seeding of Portland cement and alkali-activated blast furnace slag with a pure form of calcium silicate hydrate (C-S-H). The effects of C-S-H seeding during the early nucleation and growth period of each type...
- Keyword:
- Cement production
- Creator:
- Jeffrey J. Thomas, Mija Helena Hubler , and Hamlin Jennings
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/26/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2009
- Resource Type:
- Report
-
- Description:
- The in-depth inspection by WIDOT detected two sites that had visible cracks in the stiffener-to-hanger diaphragm welds, the east side of Hanger 6 in the north tie girder, and the east side of Hanger 4 in the south tie girder. Additionally, many ultrasonic indications were detected by WIDOT in the...
- Keyword:
- Acoustic emission testing
- Creator:
- David W. Prine
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/26/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 1993-06-16
- Resource Type:
- Report
-
- Description:
- This report describes the results of applying acoustic emission (AE) testing to the trunnion shafts of the East Span of the 1-5 Interstate Bridge. The tests were done at the request of Oregon DOT personnel to determine if active fatigue racks are present in the subject shafts.
- Keyword:
- Acoustic emission testing
- Creator:
- David W. Prine
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/26/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 1994-11-30
- Resource Type:
- Report
-
- Description:
- The U.S. has 542,000 bridges that consume billions of dollars per year in construction, rehabilitation and maintenance funds and which are the lifelines of U.S. commerce. The 1992 ISTEA (fntermodal Surface Transportation Efficiency Act) mandates the implementation of a quantitative computerized bridge management system by I 996. A prime need...
- Keyword:
- Acoustic emission testing
- Creator:
- David W. Prine
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/26/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 1995-06-06
- Resource Type:
- Report
-
- Description:
- The nondestructive, in-situ testing of early-age concrete properties is a crucial point for the progress of many construction projects in the building sector. The application of such techniques can establish e.g. the earliest possible form removal from concrete construction elements, thereby opening highways to traffic or releasing prestress from steel...
- Keyword:
- Nondestructive testing
- Creator:
- Surendra P. Shah and Thomas Voigt
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/19/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2003
- Resource Type:
- Article
-
- Description:
- The setting and hardening process of concrete is considered to be the most critical time period during the life of a concrete structure. Previous research has been conducted on an ultrasonic wave reflection method that utilizes a steel plate embedded in the concrete to measure the reflection loss of shear...
- Keyword:
- Nondestructive testing
- Creator:
- Surendra P. Shah and Thomas Voigt
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/19/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2003
- Resource Type:
- Conference Proceeding
-
- Description:
- The Center for Advanced Cement-Based Materials (ACBM) is a consortium of researchers from: Northwestern University, University of Illinois at Urbana-Champaign, Purdue University, The University of Michigan, and The National Institute of Standards and Technology. This ACBM update contains information on the article "A better Maturity Meter?" by Surendra P. Shah...
- Keyword:
- Nondestructive testing
- Creator:
- Surendra P. Shah and Thomas Voigt
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/19/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2003-10
- Resource Type:
- Article
-
- Description:
- The gradual evolution of the material properties of a cement-based material, i.e. the stiffness of cement paste, is the result of the continuous change of the microstructure with the progress of the hydration process. Based on an existing micromechanical model for the simulation of the shear and elastic modulus of...
- Keyword:
- Structural health monitoring and Cement rheology
- Creator:
- Zhihui Sun, Guang Ye, Klaas van Breugel, Surendra P. Shah, and Thomas Voigt
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/19/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2004
- Resource Type:
- Research Paper
-
- Description:
- In this paper, the correlation of reflection loss measured by an ultrasonic shear wave reflection method and the microstructure in cement-based material is investigated. Three cement pastes (Portland cement type I) with different water-cement ratios (0.35, 0.50 and 0.60) cured at 25 °C were examined. The ultrasonic shear wave reflection...
- Keyword:
- Nondestructive testing
- Creator:
- Zhihui Sun, Guang Ye, Klaas van Breugel, Surendra P. Shah, and Thomas Voigt
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/19/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2003
- Resource Type:
- Research Paper
-
- Description:
- This presentation contains information on the keynote paper "Health Monitoring of Early Age Concrete". The presentation was delivered by Surendra P. Shah at CONSEC'04 in Seoul, Korea on June 30, 2004.
- Keyword:
- Structural health monitoring and Nondestructive testing
- Creator:
- Surendra P. Shah, Thomas Voigt, and Zhihui Sun
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/19/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2004-06-30
- Resource Type:
- Presentation
-
- Description:
- The setting and hardening process of concrete can be considered as the most critical time period during the life of a concrete structure. To assure high quality and avoid problems in performance throughout the life of the material, it is essential to have reliable information about the early age properties...
- Keyword:
- Structural health monitoring
- Creator:
- Zhihui Sun, Surendra P. Shah, and Thomas Voigt
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/19/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2004
- Resource Type:
- Other
-
- Description:
- The concrete currently used in the slip-form paving process is a low slump concrete that requires both internal and external vibration in order to achieve satisfactory compaction. The use of vibrator fingers for the internal vibration often leads to trails on the surface of the pavement and to segregation around...
- Keyword:
- Slip-form pavement and Self-consolidating concrete
- Creator:
- Jean-Juste Mbele
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/19/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2007
- Resource Type:
- Masters Thesis
-
- Description:
- The paper deals with the behavior of fluid cement pastes, formulated from Self Consolidating Concretes (SCCs), and the experimental correlation of fundamental rheological properties, such as the yield stress and the viscosity, with measurements from field tests, such as the mini-cone slump flow test. As a matter of fact, several...
- Keyword:
- Self-consolidating concrete and Cement rheology
- Creator:
- Liberato Ferrara, Surendra P. Shah, and Nathan Tregger
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/19/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2007
- Resource Type:
- Research Paper
-
- Description:
- This presentation contains information on the project "Aligning Data to Support Transportation Decisions, Emerging Challenges & Opportunities for the Data World". The presentation was delivered by Joseph L. Schofer at Transportation Research Board – AASHTO Peer Exchange meeting on May 15-16, 2008.
- Keyword:
- Climate change , Urban transportation policy, and Transportation system data
- Creator:
- Joseph L. Schofer
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/19/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2008-05-16
- Resource Type:
- Presentation
-
- Description:
- Gentrification - the process in which higher income (and often younger) households displace lower income residents of a city neighborhood - has been occurring in many urban neighborhoods over the last few decades. This process changes the demographics, and often the essential character, of the neighborhood. As a result, we...
- Keyword:
- Gentrification and Urban transportation
- Creator:
- Emily R. Kushto and Joseph L. Schofer
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/19/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2008-01-10
- Resource Type:
- Research Paper
-
- Description:
- This presentation contains information about the project "The future of transportation... and how we'll pay for it" by Joseph L. Schofer, Department f Civil & Environmental Engineering. The presentation was delivered at the 40th Anniversary Seminar Day at Northwestern University on April 18, 2009.
- Keyword:
- Transportation planning and Green transportation
- Creator:
- Joseph L. Schofer
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/19/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2009-04-18
- Resource Type:
- Presentation
-
- Description:
- This study tested a dynamic traffic assignment (DTA) model as a tool for pre-planning strategies for managing major freeway incidents. Incidents of varying scale and duration were modeled in the northern Chicago highway network, and the impacts of incidents and response actions were measured in terms of both lane-mile-hours of...
- Keyword:
- Traffic engineering , Traffic monitoring , and Traffic congestion management
- Creator:
- John J. Wirtz, David F. Schulz , and Joseph L. Schofer
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/19/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2004-07-28
- Resource Type:
- Report
-
- Description:
- The mission of the Infrastructure Technology Institute is to develop strategies and tools to protect and improve the condition, capacity and performance of the nations highway, railroad, and mass transit infrastructure systems. The Institute does this through the development and deployment of (1) advanced technologies for structural health monitoring, (2)...
- Keyword:
- Structural health monitoring
- Creator:
- Jeffrey J. Thomas , Matthew P. Kotowsky, David E. Kosnik , and Joseph L. Schofer
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/12/2017
- Date Modified:
- 08/14/2017
- Resource Type:
- Report
-
- Description:
- This presentation provides information on the project "Safety Concrete - a Material Designed to Fail" by Jeffrey J. Thomas, Julie Gevrenov, Hamlin Jennings, and Edward O'Neil. The presentation was delivered at the 106th Annual Meeting & Exposition of The American Ceramic Society, Indianapolis, Indiana in 2004.
- Keyword:
- Concrete construction , Safety , and Microstructure
- Creator:
- Edward O’Neil, Hamlin Jennings, Jeffrey J. Thomas, and Julie Gevrenov
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/12/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2004
- Resource Type:
- Presentation
-
- Description:
- Few would argue that concrete is an important and useful material: after all, concrete is the backbone of the world’s infrastructure, used in vast amounts to make roads, buildings, bridges, and other structures. But sometimes familiarity breeds contempt. To most people, concrete is simply that boring grey stuff that we...
- Keyword:
- Cement , Concrete infrastructure , and Concrete
- Creator:
- Jeffrey J. Thomas and Hamlin Jennings
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/12/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2009
- Resource Type:
- Report
-
- Description:
- The objective of this program is to measure the changes in the properties of the C-S-H gel phase in cement paste as a function of the Ca/Si ratio. The motivation is to better understand the hydration products that form in blended cements with lower Ca/Si ratios than portland cement. The...
- Keyword:
- Green infrastructure and Nanotechnology
- Creator:
- Jeffrey Thomas and Hamlin Jennings
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/12/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2008
- Resource Type:
- Report
-
- Description:
- This presentation provides information on the progress report of the project "Empirical Study of Life-Cycle Cost Analysis for Bridges" by Ahmad Hadavi, 2003.
- Keyword:
- Bridges, Life cycle costing, and Life cycle assessment
- Creator:
- Ahmad Hadavi
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/12/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2003
- Resource Type:
- Presentation
-
- Description:
- This final report provides information about TEA-21 [Transportation Equity Act for the 21st Century] funded projects designated A433, and A495 "Evaluation of Capacity of Micropiles Embedded in Dolomite". The report was submitted to the Infrastructure Technology Institute at Northwestern University by Richard J. Finno on September 20, 2002.
- Keyword:
- Nondestructive testing, Dolomite , and Micropiling
- Creator:
- Richard J. Finno
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/12/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2002-09-20
- Resource Type:
- Report
-
- Description:
- Non-destructive evaluation (NDE) techniques have been used for a number of years to provide quality control of construction procedures for drilled shafts and driven concrete piles. In particular sonic echo and impulse response methods have been used extensively to check lengths and continuity of newly-installed foundations. In recent years, the...
- Keyword:
- Test section , Deep foundation , and Nondestructive testing
- Creator:
- Richard J. Finno , Peter W. Osborn, and Sarah L. Gassman
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/12/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 1997-06
- Resource Type:
- Report
-
- Description:
- An empirical procedure for fitting a complementary error function (erfc) to settlement and lateral ground movement data in a direction parallel to an excavation support wall is proposed based on extensive optical survey data obtained around a 12.8 m excavation in Chicago. The maximum ground movement and the height and...
- Keyword:
- Excavation, Clay soils , Ground control , and Performance data
- Creator:
- Jill Frances Roboski
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/12/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2005
- Resource Type:
- Research Paper
-
- Description:
- Several three-dimensional effects were observed in the performance monitoring data collected during excavation for the Ford Engineering Design Center (FEDC) in Evanston, Illinois. These responses are related to lateral deformations of the soil around the excavation walls, forces in the cross-lot and diagonal bracing that supported the temporary wall and...
- Keyword:
- Excavation, Three-dimensional analysis, Ground control, and Clay soils
- Creator:
- James Tanner Blackburn and Richard J. Finno
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/12/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2006
- Resource Type:
- Research Paper
-
- Description:
- This paper presents the results of 159 finite element simulations conducted to define the effects of excavation geometry, i.e., length, width and depth of excavation, wall system stiffness, and factor of safety against basal heave on the 3-dimensional ground movements caused by excavation through clays. The results of the analyses...
- Keyword:
- Excavation, Three-dimensional analysis, and Nondestructive testing
- Creator:
- Jill Frances Roboski, James Tanner Blackburn, and Richard J. Finno
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/12/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2006
- Resource Type:
- Research Paper
-
- Description:
- Successful use of monitoring data to update performance predictions of supported excavations depends equally on reasonable numerical simulations of performance, the type of monitoring data used as observations, and the inverse analysis techniques used to minimize the difference between predictions and observed performance. This paper summarizes each of these factors...
- Keyword:
- Excavation, Nondestructive testing , and Ground control
- Creator:
- Richard J. Finno
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/12/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2007
- Resource Type:
- Research Paper
-
- Description:
- Two numerical procedures are described that quantitatively identify a set of constitutive parameters that best represents observed ground movement data associated with a deep excavations in urban environments. This inverse problem is solved by minimizing an objective (or error) function of the weighted least-squares type that contains the difference between...
- Keyword:
- Ground control and Nondestructive testing
- Creator:
- Cecilia Rechea Bernal
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/12/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2007
- Resource Type:
- Research Paper
-
- Description:
- Performance monitoring of deep excavations typically includes slope inclinometers, optical surveying of soil deformation, tiltmeters and strain gages. Current monitoring data collection and processing requires time consuming site visits and manual data reduction by project engineers. Development of robotic and remote access geotechnical instrumentation conceptually allows processed data to be...
- Keyword:
- Excavation, Ground control, and Nondestructive testing
- Creator:
- Miltiadis Langousis
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/12/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2007-03
- Resource Type:
- Masters Thesis
-
- Description:
- This paper describes developments of integrated tools for predicting, monitoring, and controlling ground movements associated with excavations in urban areas. Successful use of monitoring data to update performance predictions of supported excavations depends equally on reasonable numerical simulations of performance, the type of monitoring data used as observations, and the...
- Keyword:
- Ground control and Nondestructive testing
- Creator:
- Richard J. Finno and Youssef M. A. Hashash
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/12/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2009
- Resource Type:
- Research Paper
-
- Description:
- This presentation provides information on the the project "Use Of High-Performance A710 Grade B Steel in Construction of Lake Villa, IL Bridge". The presentation was delivered by Morris E. Fine, Semyon Vaynman, and Nunzio Mario Biondolillo on June 14, 2006.
- Keyword:
- Nondestructive testing
- Creator:
- Morris E. Fine , Semyon Vaynman, and Nunzio Mario Biondolillo
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/12/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2006-06-14
- Resource Type:
- Presentation
-
- Description:
- This final report contains information on years 6-7-8 (2004-2007) of TEA-21 funded projects designated A487, W420, and A212. The report was submitted by Morris E. Fine and Semyon Vaynman in 2007.
- Keyword:
- Nondestructive testing
- Creator:
- Morris E. Fine and Semyon Vaynman
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/12/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2007
- Resource Type:
- Report
-
- Description:
- During the past several years an easily weldable, high strength (more than 75 ksi yield), high impact fracture toughness steel (NUCu steel) has been investigated at Northwestern University with bridge applications in mind. For good weldability without pre-heating and post-heating, the carbon content of the steel was kept low and...
- Keyword:
- NUCu steel
- Creator:
- Gautam Ghosh, Morris E. Fine, and Semyon Vaynman
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/12/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 1996-09-27
- Resource Type:
- Report
-
- Description:
- Northwestern University developed copper-precipitation-hardened, high-performance weathering steel (NUCu 70W Steel) that is produced by hot rolling after casting and then air-cooling. Due to simple processing the steel is fabricated at lower cost than competing high-performance steels that require quench and tempering. NUCu 70W steel can be easily welded without pre-...
- Keyword:
- NUCu steel
- Creator:
- Morris E. Fine and Semyon Vaynman
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/12/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2003-07-18
- Resource Type:
- Report
-
- Description:
- This brochure contains information on the NUCu Steel ASTM A-710 Grade B project published at Northwestern University's Infrastructure Technology Institute with the support of the Illinois Department of Transportation. The brochure includes further explanation to Current and Potential Applications, Chemical Composition and Steel Processing, Mechanical and Fracture Properties, Corrosion, Welding,...
- Keyword:
- NUCu steel
- Creator:
- Morris E. Fine , Semyon Vaynman, and Christopher Hahin
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/12/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2007
- Resource Type:
- Other
-
- Description:
- Northwestern University developed copper-precipitation-hardened, high-performance weathering steel (NUCu 70W Steel) that is produced by hot rolling after casting and then air-cooling. Due to simple processing the steel is fabricated at lower cost than competing high-performance steels that require quench and tempering. NUCu 70W steel can be easily welded without pre-...
- Keyword:
- NUCu steel
- Creator:
- Morris E. Fine and Semyon Vaynman
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/12/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2004
- Resource Type:
- Report
-
- Description:
- This is the final project report "A Process Control System for the John F. Kennedy Memorial Bridge" by Pablo Durango-Cohen, 2011.
- Keyword:
- Structural health monitoring
- Creator:
- David J. Corr, Yikai Chen, and Pablo Durango-Cohen
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/12/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2011
- Resource Type:
- Report
-
- Description:
- This is the final report on the project "A knowledge Management Platform for Infrastructure Performance Modeling" by Pablo Durango-Cohen.
- Keyword:
- Infrastructure Technology Institute
- Creator:
- Pablo Durango-Cohen
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/12/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2009
- Resource Type:
- Report
-
- Description:
- Experimental Time Domain Reflectometry (TDR) data obtained from the field are compared with numerical simulations using a finite-difference solution of the transmission line equations. The model simulates transmission of a voltage pulse along a lossy coaxial cable where deformities on the cable, such as crimps and shears, are represented by...
- Keyword:
- Time-domain reflectometry and Structural health monitoring
- Creator:
- Stéphane P. Bordas
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/12/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 1998-12
- Resource Type:
- Masters Thesis
-
- Description:
- This presentation is intended to provide background on the principles involved in geotechnical and infrastructure applications of Time Domain Reflectometry (TDR). TDR is basically radar in which a voltage pulse is launched along a coaxial cable. A reflection of the voltage pulse occurs at every location where the cable is...
- Keyword:
- Time-domain reflectometry and Structural health monitoring
- Creator:
- Charles H. Dowding and Kevin M. O'Connor
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Library
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2000
- Resource Type:
- Report
-
- Description:
- Time Domain Reflectometry (TDR) is a versatile technology amenable to a variety of measurements and nondestructive monitoring of infrastructure conditions. It can be utilized to monitor deformation of soil/rock and structures, monitor changes in fluid levels, and monitor water content of soils. Furthermore, this monitoring can be automated using systems...
- Keyword:
- Time-domain reflectometry and Structural health monitoring
- Creator:
- Charles H. Dowding and Kevin M. O'Connor
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Library
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2001
- Resource Type:
- Report
-
- Description:
- Two longwall coalmine panels were mined at a depth of approximately 156 m (510 ft) beneath I-70 east of Washington, Pennsylvania such that it crossed the width of one panel at two locations. The Pennsylvania Department of Transportation (PennDoT) assumed responsibility for real time monitoring of both ground deformation and...
- Keyword:
- Structural health monitoring
- Creator:
- Charles H. Dowding, Kevin M. O'Connor, David J. Whitlatch , and Ronald J. Clark
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2001
- Resource Type:
- Report
-
- Description:
- This paper reviews the new field of geo-measurement with metallic cable time domain reflectometry (TDR) for surveillance of transportation facilities. TDR is radar in a coaxial cable, and is especially advantageous for remote monitoring because of its inherently digital nature. Advances can be separated into those that leverage use of...
- Keyword:
- Structural health monitoring and Time-domain reflectometry
- Creator:
- Charles H. Dowding
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2011-07-27
- Resource Type:
- Research Paper
-
- Description:
- This thesis combines field and laboratory measurements with three dimensional (3D) finite element analysis (FEM) to demonstrate the use of Time Domain Reflectometry (TDR) cable-grout composites to measure localized shearing in soft soil. Past field installations of TDR cable-grout composites in rock have lead to its widespread use in the...
- Keyword:
- Structural health monitoring and Time-domain reflectometry
- Creator:
- James Tanner Blackburn
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2002-04
- Resource Type:
- Masters Thesis
-
- Description:
- This thesis presents the application of Time Domain Reflectometry technology in nine case studies. Presented in detail are cable and grout installation techniques, data acquisition instrumentation and autonomous real time monitoring of soil deformation using TDR. The goal of this work is to summarize the state of the technology in...
- Keyword:
- Structural health monitoring
- Creator:
- Matthieu L. Dussud
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2002-12
- Resource Type:
- Masters Thesis
-
- Description:
- This file contains application materials to Crossbow's Smart Dust Challenge Contest by Mat Kotowsky and Hasan Ozer.
- Keyword:
- Structural health monitoring
- Creator:
- Matthew P. Kotowsky and Hasan Ozer
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2004-12
- Resource Type:
- Project
-
- Description:
- This file contains the poster on "Wireless Data Acquisition System in Autonomous Crack Monitoring Projects" from Crossbow Smart Dust Challenge created by Mat Kotowsky, Hasan Ozer, and David Kosnik.
- Keyword:
- Structural health monitoring
- Creator:
- David Kosnik , Matthew P. Kotowsky , and Hasan Ozer
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2005
- Resource Type:
- Poster
-
- Description:
- This file contains power-point slides of Application to Crossbow’s Smart Dust Challenge Contest, title "Wireless Data Acquisition System" by Mat Kotowsky and Hasan Ozer. The presentation was delivered at University of California, Berkeley on February 11, 2005.
- Keyword:
- Structural health monitoring
- Creator:
- Hasan Ozer and Matthew P. Kotowsky
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2005-02-11
- Resource Type:
- Presentation
-
- Description:
- This paper describes qualification of devices to measure sub micro-meter changes in crack width, which is the basis of autonomous crack monitoring for control of blasting vibrations. Performance of LVDT, eddy current and potentiometer sensors to monitor long-term and transient displacements will be described. Potentiometers are attractive for wireless measurement,...
- Keyword:
- Structural health monitoring
- Creator:
- Hasan Ozer, Charles H. Dowding, and Dan Marron
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2007
- Resource Type:
- Research Paper
-
- Description:
- Miniaturized, wireless instrumentation is now a reality and this thesis describes development of such a system to monitor crack response. Comparison of environmental (long-term) and blast-induced (dynamic) crack width changes in residential structures has lead to a new approach to monitoring and controlling construction vibrations. In wireless systems transducer power...
- Keyword:
- Structural health monitoring
- Creator:
- Hasan Ozer
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2005
- Resource Type:
- Masters Thesis
-
- Description:
- Mining near the town of Blanford, Indiana for a number of years has led to an opportunity for Peabody Coal Company to study and compare environmental and blast effects. Such a comparison allows description of any blast effects relative to those caused by common environmental changes, which should be familiar...
- Keyword:
- Structural health monitoring
- Creator:
- Charles H. Dowding and Spencer W. Lucole
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Library
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 1988-01-28
- Resource Type:
- Report
-
- Description:
- Public concern over construction vibration-induced cracking has led to the development of a radically new approach to vibration, an autonomous crack comparometer (ACC). This thesis chronicles the first step of developing equipment and software necessary for this system. The new system will automatically compare longterm weather induced micrometer changes in...
- Keyword:
- Structural health monitoring
- Creator:
- Damian R. Siebert
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2000-06
- Resource Type:
- Masters Thesis
-
- Description:
- The thesis describes the second phase of development of the Autonomous Crack Comparometer (ACC) system to incorporate measurements of ground motions and add several changes in the autonomous operation. In order to obtain the ground motion and air blast data, four additional transducers have been added. There are now a...
- Keyword:
- Structural health monitoring
- Creator:
- Michaël Louis
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2000
- Resource Type:
- Masters Thesis
-
- Description:
- Construction is omnipresent in modern-day America. It's the sound and vibration of a nation scrambling to keep up with its burgeoning population. In most states, allowable construction-induced ground motions range from 0.5 to 1.0 inches per second (in/sec) and under certain conditions up to 2.0 in/sec. However, ground motion as...
- Keyword:
- Structural health monitoring
- Creator:
- Charles H. Dowding
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2001
- Resource Type:
- Report
-
- Description:
- This thesis consists of the data and analysis of structural responses for two different studies: the Office of Surface Mining (OSM) study of the velocity response of “atypical” residential structures and the Autonomous Crack Monitoring (ACM) study. The main basis of this thesis was to do additional analysis on a...
- Keyword:
- Structural health monitoring
- Creator:
- Laureen M. McKenna
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2002-03
- Resource Type:
- Masters Thesis
-
- Description:
- This appendix synthesizes micrometer changes in crack width in response to both long term (environmental) and transient (blast vibration) of four of the structures in the main body. The appendix begins with a description of the genesis of the study and instruments employed. Response of the distressed wood-framed structure in...
- Keyword:
- Structural health monitoring
- Creator:
- Charles H. Dowding and Laureen M. McKenna
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2003
- Resource Type:
- Other
-
- Description:
- Autonomous Crack Measurement (ACM) facilitates simultaneous measurement of crack response to environmental changes and vibrations produced by various construction activities. Dual-purpose crack displacement sensors measure crack response, while the vibration environment is defined by standard seismological transducers and the weather environment is defined as changes in temperature and humidity. This...
- Keyword:
- Structural health monitoring and Cracking of concrete
- Creator:
- Mickey L. Snider
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2003-05
- Resource Type:
- Masters Thesis
-
- Description:
- All structures have cosmetic cracks, which have no influence on structural integrity and usually remain unremarked until the structure’s occupants sense ground vibrations. Such vibrations are often associated with engineering activity, but are rarely responsible for cracks. However, this is difficult to prove without scientific basis. Automated Crack Monitoring (ACM)...
- Keyword:
- Structural health monitoring and Cracking of concrete
- Creator:
- Markian B. Petrina
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2004-08
- Resource Type:
- Masters Thesis
-
- Description:
- Cosmetic cracks are very common in structures, and most of the time they remain unnoticed and do not decrease the structural integrity. Although these cracks are unremarkable and barely noticeable, occupants become concerned about these cracks when construction occurs nearby. In order to investigate the true nature of these cracks,...
- Keyword:
- Structural health monitoring and Cracking of concrete
- Creator:
- Remi Baillot
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2004-12
- Resource Type:
- Masters Thesis
-
- Description:
- In early 2001, a sinkhole formed directly under State Road 66 near the city of Sebring in Highlands County, Florida. The Florida DOT built a land bridge over the sinkhole and the road was reopened to traffic. Since SR-66 is an important regional trucking route, it was decided that the...
- Keyword:
- Structural health monitoring
- Creator:
- David E. Kosnik
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2005
- Resource Type:
- Report
-
- Description:
- Crack and structural response to construction trench blasting was measured in a woodframe house with a stucco exterior. Blasts at distances between 232 m to 368 m produced peak particle velocities (PPV) and air blast over pressures (AB) of 9 mm/sec and 0.02 kPa (123 dB), respectively. Structural response velocities...
- Keyword:
- Structural health monitoring
- Creator:
- Charles H. Dowding , Catherine T. Aimone-Martin, and Vitor L. Rosenhaim
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2005
- Resource Type:
- Research Paper
-
- Description:
- This thesis summarizes two further developments of the Autonomous Crack Monitoring (ACM) system, which facilitates simultaneous measurement of crack response to environmental changes and various dynamic events. The first component was measurement of crack responses in three different materials and locations in a residential structure subjected to ground vibrations produced...
- Keyword:
- Structural health monitoring
- Creator:
- Mike J. Waldron
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2006-06
- Resource Type:
- Masters Thesis
-
- Description:
- This thesis summarized the qualification and testing of two commercial Autonomous Crack Monitoring (ACM) systems for use in measuring micrometer displacement of cracks. Qualification involved the assessment of both laboratory and field performance in a residential structure subjected to nearby quarry blasting for the production of roadway aggregate. Aggregate and...
- Keyword:
- Structural health monitoring
- Creator:
- Brandon G. Hughes
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2006-06
- Resource Type:
- Masters Thesis
-
- Description:
- A unique judicial opportunity allowed measurement of the response of three cracks in residential structure to blasting for underground aggregate mining. Instrumented cracks were located in the interior basement CMU mortar and upstairs dry wall as well as exterior brick work. The dynamic environment was unusual. Even though the blasting...
- Keyword:
- Structural health monitoring and Cracking of concrete
- Creator:
- Mike Waldron, G.F. Revey, and C.H. Dowding
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2007
- Resource Type:
- Research Paper
-
- Description:
- Micro-meter dynamic crack responses in a two story structure to rock blasting- and wind gust- excitation are compared to those induced by long term climatological effects. These measurements substantiate the conservancy of the 12.5 mm/s (0.5 in./s) blasting vibration control to protect residential structures against cracking. The test structure was...
- Keyword:
- Micrometers , Blast effect , Structural health monitoring, and Cracking of concrete
- Creator:
- Charles H. Dowding and C. T. Aimone-Martin
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2007
- Resource Type:
- Research Paper
-
- Description:
- This paper describes the technology and methods deployed in the continuous autonomous remote monitoring of cracks in interior and exterior walls of a residence near a limestone quarry. The object is to quantitatively compare crack response to blast-induced ground motion to that induced by diurnal temperature changes, weather fronts, and...
- Keyword:
- Cracking of concrete and Structural health monitoring
- Creator:
- David E. Kosnik
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2008-03-21
- Resource Type:
- Research Paper
-
- Description:
- In this paper vibratory crack response is compared to that produced by volumetric changes in foundation soils induced by natural events. These natural phenomena include changes in the water table, changes in soil moisture, and formation of ice lenses to name a few. Previous papers have compared vibratory responses of...
- Keyword:
- Structural health monitoring and Cracking of concrete
- Creator:
- V. Rosenhaim, Catherine Aimone-Martin, Jeffrey Meissner , and Charles H. Dowding
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2009
- Resource Type:
- Research Paper
-
- Description:
- This paper describes the technology and methods deployed in the continuous autonomous remote monitoring of cracks in interior and exterior walls of a residence near a limestone quarry. The objective is to quantitatively compare crack response due to blast-induced ground motion to that induced by diurnal temperature changes, weather fronts,...
- Keyword:
- Structural health monitoring and Cracking of concrete
- Creator:
- David E. Kosnik
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2009
- Resource Type:
- Research Paper
-
- Description:
- Cosmetic and structural cracks are a large concern for homeowners. Although these cracks can develop from a variety of causes: differential foundation settlement, occupant activity, climatological effects, as well as dynamic events, people tend to look to dynamic events like blasting, construction, or traffic vibrations to be the culprit. This...
- Keyword:
- Crack responses , Structural integrity assessment , and Ground motions
- Creator:
- Jeffrey Meissner and Charles H. Dowding
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2009
- Resource Type:
- Report
-
- Description:
- The notion of blasting, even in a controlled setting such as a limestone quarry, can be alarming to residents and business owners within earshot. Because humans are inherently sensitive to blast-induced vibrations, they perceive that the structures in which they live in are equally sensitive. The goal of this project...
- Keyword:
- Ground motion, Concrete block structure, and Structural health monitoring
- Creator:
- Charles H. Dowding and Jeffrey E. Meissner
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2009
- Resource Type:
- Report
-
- Description:
- This appendix contains all software used to program the MICA2 motes for Version 1 of the MICA2-based wireless ACM system. This appendix is organized by software directory and only the modified files are included.
- Keyword:
- Structural health monitoring , Wireless sensor networks , and Source code
- Creator:
- Matthew P. Kotowsky
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2010
- Resource Type:
- Software or Program Code
-
- Description:
- Autonomous Crack Monitoring (ACM) and Autonomous Crack Propagation Sensing (ACPS) are two types of structural health monitoring in which characteristics of cracks are recorded over long periods of time. ACM seeks to correlate changes in widths of cosmetic cracks in structures to nearby blasting or construction vibration activity for the...
- Keyword:
- Structural health monitoring and Wireless sensor networks
- Creator:
- Matthew P. Kotowsky
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2010
- Resource Type:
- Masters Thesis
-
- Description:
- This manual describes use of a new hybrid autonomous crack and structural response monitoring (ACSM) system. It is designed as a low cost alternative to the research grade version employing SOMAT’s eDAQ data recording system. The concept is to combine a new field portable, 24 bit, 12 channel seismograph with...
- Keyword:
- Structural monitoring system
- Creator:
- Thomas Koegel
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2011
- Resource Type:
- Other
-
- Description:
- This paper describes the details of installation and operation of a commercially- available wireless system to measure response of an interior cosmetic crack in a residential structure over a period of a year. Wireless data loggers managed the response of low power draw potentiometers that measured micrometer changes in crack...
- Keyword:
- structural health monitoring
- Creator:
- Dowding, C.H. , Kotowsky, M., and Koegel, T.
- Owner:
- Nurganym Agzamova
- Language:
- English
- Date Uploaded:
- 07/05/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2012
- Resource Type:
- Research Paper
-
- Description:
- The purpose of this comparative field qualification is to demonstrate the new Kelunji EchoPro hybrid ACSM system and its performance relative to the eDAQ and eko Motes systems. These three systems are installed at a test site in Sycamore, IL, adjacent to an active quarry. Data for this report was...
- Keyword:
- Infrastructure Technology Institute
- Creator:
- Thomas Koegel
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 06/28/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2011
- Resource Type:
- Report
-
- Description:
- A .rar folder with data files for the project on "Minimizing Shrinkage, Creep and Cracking Damage to Concrete Bridges", 2010.
- Keyword:
- Dataset
- Creator:
- Guang-Hua Li and Zdenek P. Bazant
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 06/22/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2008
- Resource Type:
- Dataset
-
- Description:
- An .xls file with data for the project on "Minimizing Shrinkage, Creep and Cracking Damage to Concrete Bridges (A423, A447)", 2010.
- Keyword:
- Dataset
- Creator:
- Kyung-Tae Kim
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 06/22/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2010
- Resource Type:
- Dataset
-
- Description:
- An .xls file with data for the project on "Minimizing Shrinkage, Creep and Cracking Damage to Concrete Bridges (A423, A447)", 2010.
- Keyword:
- Dataset
- Creator:
- Qiang Yu
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 06/22/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2010
- Resource Type:
- Dataset
-
- Description:
- An .xls file with data for the project on "Minimizing Shrinkage, Creep and Cracking Damage to Concrete Bridges (A423, A447)", 2010.
- Keyword:
- Dataset
- Creator:
- Kyung-Tae Kim
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 06/22/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2010
- Resource Type:
- Dataset
-
- Description:
- Despite a relatively mature technology for its control, corrosion caused by stray current from electrified rapid-transit systems costs the United States approximately $500 million annually. Part of that cost is the result of corrosion of the electrified rapid-transit system itself, and part is the result of corrosion on neighboring infrastructure...
- Keyword:
- Stray current corrosion
- Creator:
- Barlo, Thomas J. and Zdunek, Alan D.
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 06/22/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 1995-05
- Resource Type:
- Report
-
- Description:
- The finite element method is used to investigate failure mechanisms in pin-hanger connection in aging highway bridges. Bridge pins and hangers are typically considered as critical elements whose failure may result in partial or entire collapse of the structure. The primary function of a pin-hanger connection is to allow for...
- Keyword:
- Structural integrity assessment
- Creator:
- Houcque, David
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 06/22/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2008-06
- Resource Type:
- Dissertation
-
- Description:
- This report shows the results of acoustic emission (AE) monitoring, and provides additional information on the nature of the ultrasonic indications in the north east trunnion shaft.
- Keyword:
- Acoustic emission testing
- Creator:
- Jerome E. Oleksy and David W. Prine
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 06/21/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 1996-05
- Resource Type:
- Report
-
- Description:
- A remote global monitoring system is being operated on a 65 year old lift bridge in Sturgeon Bay Wisconsin. The system uses both strain gages and clinometers to continuously monitor the "health" of the fracture critical components of the bridge. Ruggedized miniaturized data loggers are locally mounted on the structure...
- Keyword:
- Acoustic emission testing
- Creator:
- Fish, Philip and Prine, David
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 06/21/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 1997
- Resource Type:
- Report
-
- Description:
- Current bridge condition determination is based almost entirely on the use of visual inspection. This approach to bridge inspection provides data that is subjective and not traceable. Nondestructive evaluation (NDE) is a tool that in actuality is little used on bridges, but could eliminate much of the subjectivity of the...
- Keyword:
- Acoustic emission testing
- Creator:
- Prine, David
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 06/21/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 1995-05
- Resource Type:
- Report
-
- Description:
- This technical report shows the findings of acoustic emission and strain gage monitoring tests conducted by research engineers of Infrastructure Technology Institute from Northwestern University on April 18, 1997 in Sacramento, California.
- Keyword:
- Acoustic emission testing
- Creator:
- Marron, Daniel and Prine, David W.
- Owner:
- Nurganym Agzamova
- Language:
- English
- Date Uploaded:
- 06/21/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 1997-04-18
- Resource Type:
- Report
-
- Description:
- This report includes the findings of acoustic emission (AE) tests on the Fremont tied arch bridge in Portland Oregon conducted by research engineers from the Infrastructure Technology Institute of Northwestern University on March 24th, 1997.
- Keyword:
- Acoustic emission testing
- Creator:
- Prine, David
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 06/21/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 1997
- Resource Type:
- Report
-
- Description:
- This paper describes application of AE monitoring techniques to localize the sources of large noises in civil structures. These noises occur during operation of moveable portions of a structure in such things as lift bridges and moveable sports stadium roofs. The use of straightforward AE monitoring techniques can provide clear...
- Keyword:
- Acoustic emission testing
- Creator:
- Prine, David
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 06/21/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2004
- Resource Type:
- Research Paper
-
- Description:
- Kosnik, D. E., Northwestern University . Infrastructure Technology Institute, Department of Civil Environmental Engineering, Robert R. McCormick School of Engineering Applied Science. (2008). A new approach to acoustic emission testing of difficult-to-reach steel bridge details. Evanston, Illinois: Infrastructure Technology Institute/Department of Civil & Environmental Engineering.
- Keyword:
- Acoustic emission testing
- Creator:
- Kosnik, David E.
- Owner:
- Nurganym Agzamova
- Language:
- English
- Date Uploaded:
- 06/21/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2008
- Resource Type:
- Research Paper
-
- Description:
- Acoustic emission (AE) testing was used to identify the source of audible “bangs” generated during opening and closing of a large, double-leaf rolling-lift bascule bridge. The data were analyzed using a combination of well-established AE techniques, including first hit analysis (FHA), planar location analysis, and linear location analysis. The FHA...
- Keyword:
- Acoustic emission testing
- Creator:
- Matthew P. Kotowsky , David E. Kosnik, David Corr, and David W. Prine
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 06/21/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2009-06-10
- Resource Type:
- Report
-
- Description:
- Scour is by far the primary cause of bridge failures in the United States. Scour and other hydraulic effects are particularly threatening because the deterioration is often invisible, hidden beneath turbid water. Many scour monitoring methods attempt to measure the development of scour pockets themselves. However, this is difficult due...
- Keyword:
- Scours at bridges and Tiltmeter
- Creator:
- Kosnik, David and Ng, Steve
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 06/21/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2010-02-17
- Resource Type:
- Research Paper
-
- Description:
- Acoustic emission (AE) testing was deployed on details of two large steel Interstate Highway bridges: one cantilever through-truss and one trapezoidal box girder bridge. Quantitative measurements of activity levels at known and suspected crack locations were made by monitoring AE under normal service loads (e.g., live traffic and wind). AE...
- Keyword:
- Acoustic emission testing
- Creator:
- Kosnik, D. E. , Hopwood, T., and Corr, D. J.
- Owner:
- Nurganym Agzamova
- Publisher:
- Northwestern University Libraries
- Language:
- English
- Date Uploaded:
- 06/21/2017
- Date Modified:
- 08/14/2017
- Date Created:
- 2010
- Resource Type:
- Research Paper