Index Catalog // Arch : Northwestern University Institutional Repository

1. 2008-2009 Report: Test House in Franklin, WI

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

2. Crack Measurement: New Approach to Addressing Blasting Complaints

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

3. Micro-Meter Measurement of Cracks to Compare Blast and Environmental Effects

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

4. Response of Cracks to Construction Vibrations and Environmental Effects

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

5. Comparison of Micro-inch In-Plane and Out-of-Plane Response of Cracks to Blast Vibration and Weather

Description:: Most studies of crack response have focused on opening and closing of a crack in the plane of the wall in which the crack occurs. Crack movement also occurs perpendicular or normal to the plane of the wall. This paper will examine and compare the in-plane and out-of-plane (normal) response...
Keyword:: civil engineering
Creator:: Charles H. Dowding, Mike J. Waldron, and Jeffrey E. Meissner
Owner:: Chris Diaz
Date Uploaded:: 08/14/2017
Date Modified:: 08/14/2017
Date Created:: 2010
Resource Type:: Research Paper

6. Response of Uncracked Drywall Joints and Panels to Blast Vibration and Weather

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

7. Real Time Monitoring of Infrastructure Using TDR Technology: Principles

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

8. Real Time Monitoring of Infrastructure Using TDR Technology: Case Histories

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

9. Real Time Monitoring of Infrastructure of Subsidence Along I-70 in Washington, PA

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

10. Geo-Measurements with Metallic TDR Cable Technology for Infrastructure Surveillance

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

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1. 2008-2009 Report: Test House in Franklin, WI

2. Crack Measurement: New Approach to Addressing Blasting Complaints

3. Micro-Meter Measurement of Cracks to Compare Blast and Environmental Effects

4. Response of Cracks to Construction Vibrations and Environmental Effects

5. Comparison of Micro-inch In-Plane and Out-of-Plane Response of Cracks to Blast Vibration and Weather

6. Response of Uncracked Drywall Joints and Panels to Blast Vibration and Weather

7. Real Time Monitoring of Infrastructure Using TDR Technology: Principles

8. Real Time Monitoring of Infrastructure Using TDR Technology: Case Histories

9. Real Time Monitoring of Infrastructure of Subsidence Along I-70 in Washington, PA

10. Geo-Measurements with Metallic TDR Cable Technology for Infrastructure Surveillance

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1. 2008-2009 Report: Test House in Franklin, WI

2. Crack Measurement: New Approach to Addressing Blasting Complaints

3. Micro-Meter Measurement of Cracks to Compare Blast and Environmental Effects

4. Response of Cracks to Construction Vibrations and Environmental Effects

5. Comparison of Micro-inch In-Plane and Out-of-Plane Response of Cracks to Blast Vibration and Weather

6. Response of Uncracked Drywall Joints and Panels to Blast Vibration and Weather

7. Real Time Monitoring of Infrastructure Using TDR Technology: Principles

8. Real Time Monitoring of Infrastructure Using TDR Technology: Case Histories

9. Real Time Monitoring of Infrastructure of Subsidence Along I-70 in Washington, PA

10. Geo-Measurements with Metallic TDR Cable Technology for Infrastructure Surveillance