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Kerop D Janoyan - One of the best experts on this subject based on the ideXlab platform.

  • real time wireless vibration monitoring for operational modal analysis of an Integral Abutment highway Bridge
    Engineering Structures, 2009
    Co-Authors: Matthew J Whelan, Michael V Gangone, Kerop D Janoyan
    Abstract:

    Remote structural health monitoring systems employing a sensor-based quantitative assessment of in-service demands and structural condition are perceived as the future in long-term Bridge management programs. However, the data analysis techniques and, in particular, the technology conceived years ago that are necessary for accurately and efficiently extracting condition assessment measures from highway infrastructure have just recently begun maturation. In this study, a large-scale wireless sensor network is deployed for ambient vibration testing of a single-span Integral Abutment Bridge to derive in-service modal parameters. Dynamic behavior of the structure from ambient and traffic loads was measured with accelerometers for experimental determination of the natural frequencies, damping ratios, and mode shapes of the Bridge. Real-time data collection from a 40-channel single network operating with a sampling rate of 128 Hz per sensor was achieved with essentially lossless data transmission. Successful acquisition of high-rate, lossless data on the highway Bridge validates the proprietary wireless network protocol within an actual service environment. Operational modal analysis is performed to demonstrate the capabilities of the acquisition hardware with additional correlation of the derived modal parameters to a Finite Element Analysis of a model developed using as-built drawings to check plausibility of the mode shapes. Results from this testing demonstrate that wireless sensor technology has matured to the degree that modal analysis of large civil structures with a distributed network is a currently feasible and a comparable alternative to cable-based measurement approaches.

  • Real-time wireless vibration monitoring for operational modal analysis of an Integral Abutment highway Bridge
    Engineering Structures, 2009
    Co-Authors: Matthew J Whelan, Michael V Gangone, Kerop D Janoyan, Ratneshwar Jha
    Abstract:

    Remote structural health monitoring systems employing a sensor-based quantitative assessment of in-service demands and structural condition are perceived as the future in long-term Bridge management programs. However, the data analysis techniques and, in particular, the technology conceived years ago that are necessary for accurately and efficiently extracting condition assessment measures from highway infrastructure have just recently begun maturation. In this study, a large-scale wireless sensor network is deployed for ambient vibration testing of a single-span Integral Abutment Bridge to derive in-service modal parameters. Dynamic behavior of the structure from ambient and traffic loads was measured with accelerometers for experimental determination of the natural frequencies, damping ratios, and mode shapes of the Bridge. Real-time data collection from a 40-channel single network operating with a sampling rate of 128 Hz per sensor was achieved with essentially lossless data transmission. Successful acquisition of high-rate, lossless data on the highway Bridge validates the proprietary wireless network protocol within an actual service environment. Operational modal analysis is performed to demonstrate the capabilities of the acquisition hardware with additional correlation of the derived modal parameters to a Finite Element Analysis of a model developed using as-built drawings to check plausibility of the mode shapes. Results from this testing demonstrate that wireless sensor technology has matured to the degree that modal analysis of large civil structures with a distributed network is a currently feasible and a comparable alternative to cable-based measurement approaches. © 2009 Elsevier Ltd. All rights reserved.

  • performance monitoring of a short span Integral Abutment Bridge using wireless sensor technology
    The 14th International Symposium on: Smart Structures and Materials & Nondestructive Evaluation and Health Monitoring, 2007
    Co-Authors: Michael V Gangone, Matthew J Whelan, Michael P Fuchs, Kerop D Janoyan
    Abstract:

    Discussed in this paper is the implementation of a wireless sensor system for performance monitoring of Bridges. The advanced wireless sensor system, developed at Clarkson University's Laboratory for Intelligent Infrastructure and Transportation Technologies (LIITT), allows for structural monitoring of Bridges. A short-span Integral-Abutment Bridge located in New York State is instrumented with a wireless sensor system measuring acceleration, and strain to monitor the behavior of the structure under various loading conditions including ambient, environmental and traffic loading. Strain and acceleration measurements are recorded simultaneously and in real time to validate various performance characteristics of the Bridge, including load distribution along an interior girder, as well as additional stiffness factors (end fixity and composite action of the beams and Bridge deck), using existing Bridge load testing and condition evaluation guidelines used by the New York State Department of Transportation (NYSDOT) and American Association of State Highway and Transportation Officials (AASHTO). Additionally, acceleration measurements are used to extract the superstructure's first five natural frequencies and corresponding mode shapes. Results are compared to a developed Finite Element Method (FEM) model based on the Bridge as built drawings.

Michael V Gangone - One of the best experts on this subject based on the ideXlab platform.

  • real time wireless vibration monitoring for operational modal analysis of an Integral Abutment highway Bridge
    Engineering Structures, 2009
    Co-Authors: Matthew J Whelan, Michael V Gangone, Kerop D Janoyan
    Abstract:

    Remote structural health monitoring systems employing a sensor-based quantitative assessment of in-service demands and structural condition are perceived as the future in long-term Bridge management programs. However, the data analysis techniques and, in particular, the technology conceived years ago that are necessary for accurately and efficiently extracting condition assessment measures from highway infrastructure have just recently begun maturation. In this study, a large-scale wireless sensor network is deployed for ambient vibration testing of a single-span Integral Abutment Bridge to derive in-service modal parameters. Dynamic behavior of the structure from ambient and traffic loads was measured with accelerometers for experimental determination of the natural frequencies, damping ratios, and mode shapes of the Bridge. Real-time data collection from a 40-channel single network operating with a sampling rate of 128 Hz per sensor was achieved with essentially lossless data transmission. Successful acquisition of high-rate, lossless data on the highway Bridge validates the proprietary wireless network protocol within an actual service environment. Operational modal analysis is performed to demonstrate the capabilities of the acquisition hardware with additional correlation of the derived modal parameters to a Finite Element Analysis of a model developed using as-built drawings to check plausibility of the mode shapes. Results from this testing demonstrate that wireless sensor technology has matured to the degree that modal analysis of large civil structures with a distributed network is a currently feasible and a comparable alternative to cable-based measurement approaches.

  • Real-time wireless vibration monitoring for operational modal analysis of an Integral Abutment highway Bridge
    Engineering Structures, 2009
    Co-Authors: Matthew J Whelan, Michael V Gangone, Kerop D Janoyan, Ratneshwar Jha
    Abstract:

    Remote structural health monitoring systems employing a sensor-based quantitative assessment of in-service demands and structural condition are perceived as the future in long-term Bridge management programs. However, the data analysis techniques and, in particular, the technology conceived years ago that are necessary for accurately and efficiently extracting condition assessment measures from highway infrastructure have just recently begun maturation. In this study, a large-scale wireless sensor network is deployed for ambient vibration testing of a single-span Integral Abutment Bridge to derive in-service modal parameters. Dynamic behavior of the structure from ambient and traffic loads was measured with accelerometers for experimental determination of the natural frequencies, damping ratios, and mode shapes of the Bridge. Real-time data collection from a 40-channel single network operating with a sampling rate of 128 Hz per sensor was achieved with essentially lossless data transmission. Successful acquisition of high-rate, lossless data on the highway Bridge validates the proprietary wireless network protocol within an actual service environment. Operational modal analysis is performed to demonstrate the capabilities of the acquisition hardware with additional correlation of the derived modal parameters to a Finite Element Analysis of a model developed using as-built drawings to check plausibility of the mode shapes. Results from this testing demonstrate that wireless sensor technology has matured to the degree that modal analysis of large civil structures with a distributed network is a currently feasible and a comparable alternative to cable-based measurement approaches. © 2009 Elsevier Ltd. All rights reserved.

  • performance monitoring of a short span Integral Abutment Bridge using wireless sensor technology
    The 14th International Symposium on: Smart Structures and Materials & Nondestructive Evaluation and Health Monitoring, 2007
    Co-Authors: Michael V Gangone, Matthew J Whelan, Michael P Fuchs, Kerop D Janoyan
    Abstract:

    Discussed in this paper is the implementation of a wireless sensor system for performance monitoring of Bridges. The advanced wireless sensor system, developed at Clarkson University's Laboratory for Intelligent Infrastructure and Transportation Technologies (LIITT), allows for structural monitoring of Bridges. A short-span Integral-Abutment Bridge located in New York State is instrumented with a wireless sensor system measuring acceleration, and strain to monitor the behavior of the structure under various loading conditions including ambient, environmental and traffic loading. Strain and acceleration measurements are recorded simultaneously and in real time to validate various performance characteristics of the Bridge, including load distribution along an interior girder, as well as additional stiffness factors (end fixity and composite action of the beams and Bridge deck), using existing Bridge load testing and condition evaluation guidelines used by the New York State Department of Transportation (NYSDOT) and American Association of State Highway and Transportation Officials (AASHTO). Additionally, acceleration measurements are used to extract the superstructure's first five natural frequencies and corresponding mode shapes. Results are compared to a developed Finite Element Method (FEM) model based on the Bridge as built drawings.

Matthew J Whelan - One of the best experts on this subject based on the ideXlab platform.

  • real time wireless vibration monitoring for operational modal analysis of an Integral Abutment highway Bridge
    Engineering Structures, 2009
    Co-Authors: Matthew J Whelan, Michael V Gangone, Kerop D Janoyan
    Abstract:

    Remote structural health monitoring systems employing a sensor-based quantitative assessment of in-service demands and structural condition are perceived as the future in long-term Bridge management programs. However, the data analysis techniques and, in particular, the technology conceived years ago that are necessary for accurately and efficiently extracting condition assessment measures from highway infrastructure have just recently begun maturation. In this study, a large-scale wireless sensor network is deployed for ambient vibration testing of a single-span Integral Abutment Bridge to derive in-service modal parameters. Dynamic behavior of the structure from ambient and traffic loads was measured with accelerometers for experimental determination of the natural frequencies, damping ratios, and mode shapes of the Bridge. Real-time data collection from a 40-channel single network operating with a sampling rate of 128 Hz per sensor was achieved with essentially lossless data transmission. Successful acquisition of high-rate, lossless data on the highway Bridge validates the proprietary wireless network protocol within an actual service environment. Operational modal analysis is performed to demonstrate the capabilities of the acquisition hardware with additional correlation of the derived modal parameters to a Finite Element Analysis of a model developed using as-built drawings to check plausibility of the mode shapes. Results from this testing demonstrate that wireless sensor technology has matured to the degree that modal analysis of large civil structures with a distributed network is a currently feasible and a comparable alternative to cable-based measurement approaches.

  • Real-time wireless vibration monitoring for operational modal analysis of an Integral Abutment highway Bridge
    Engineering Structures, 2009
    Co-Authors: Matthew J Whelan, Michael V Gangone, Kerop D Janoyan, Ratneshwar Jha
    Abstract:

    Remote structural health monitoring systems employing a sensor-based quantitative assessment of in-service demands and structural condition are perceived as the future in long-term Bridge management programs. However, the data analysis techniques and, in particular, the technology conceived years ago that are necessary for accurately and efficiently extracting condition assessment measures from highway infrastructure have just recently begun maturation. In this study, a large-scale wireless sensor network is deployed for ambient vibration testing of a single-span Integral Abutment Bridge to derive in-service modal parameters. Dynamic behavior of the structure from ambient and traffic loads was measured with accelerometers for experimental determination of the natural frequencies, damping ratios, and mode shapes of the Bridge. Real-time data collection from a 40-channel single network operating with a sampling rate of 128 Hz per sensor was achieved with essentially lossless data transmission. Successful acquisition of high-rate, lossless data on the highway Bridge validates the proprietary wireless network protocol within an actual service environment. Operational modal analysis is performed to demonstrate the capabilities of the acquisition hardware with additional correlation of the derived modal parameters to a Finite Element Analysis of a model developed using as-built drawings to check plausibility of the mode shapes. Results from this testing demonstrate that wireless sensor technology has matured to the degree that modal analysis of large civil structures with a distributed network is a currently feasible and a comparable alternative to cable-based measurement approaches. © 2009 Elsevier Ltd. All rights reserved.

  • performance monitoring of a short span Integral Abutment Bridge using wireless sensor technology
    The 14th International Symposium on: Smart Structures and Materials & Nondestructive Evaluation and Health Monitoring, 2007
    Co-Authors: Michael V Gangone, Matthew J Whelan, Michael P Fuchs, Kerop D Janoyan
    Abstract:

    Discussed in this paper is the implementation of a wireless sensor system for performance monitoring of Bridges. The advanced wireless sensor system, developed at Clarkson University's Laboratory for Intelligent Infrastructure and Transportation Technologies (LIITT), allows for structural monitoring of Bridges. A short-span Integral-Abutment Bridge located in New York State is instrumented with a wireless sensor system measuring acceleration, and strain to monitor the behavior of the structure under various loading conditions including ambient, environmental and traffic loading. Strain and acceleration measurements are recorded simultaneously and in real time to validate various performance characteristics of the Bridge, including load distribution along an interior girder, as well as additional stiffness factors (end fixity and composite action of the beams and Bridge deck), using existing Bridge load testing and condition evaluation guidelines used by the New York State Department of Transportation (NYSDOT) and American Association of State Highway and Transportation Officials (AASHTO). Additionally, acceleration measurements are used to extract the superstructure's first five natural frequencies and corresponding mode shapes. Results are compared to a developed Finite Element Method (FEM) model based on the Bridge as built drawings.

Catherine E French - One of the best experts on this subject based on the ideXlab platform.

  • behavior of an Integral Abutment Bridge in minnesota us
    Structural Engineering International, 2011
    Co-Authors: Jimin Huang, Carol K Shield, Catherine E French
    Abstract:

    AbstractThe behavior of an Integral Abutment (IA) Bridge near Rochester, Minnesota, was investigated from the beginning of construction through approximately 7 years of service using data collected...

  • time dependent behavior of a concrete Integral Abutment Bridge
    Transportation Research Record, 2005
    Co-Authors: Jimin Huang, Carol K Shield, Catherine E French
    Abstract:

    Time-dependent behavior of an Integral Abutment Bridge near Rochester, Minnesota, was investigated from the beginning of construction through 7 years of service by using field data collected from more than 150 instruments installed in the Bridge during construction. Long-term Bridge shortening was observed from the readings of horizontal extensometers installed behind the Abutments. Measured pile curvatures steadily increased with time. To understand this unexpected Bridge behavior better, a time-dependent numerical study using the creep and shrinkage models from American Concrete Institute Committee 209 was conducted. The results obtained in this research indicate that concrete creep and shrinkage had a significant effect on the behavior of the concrete Integral Abutment Bridge over the course of the 7-year study.

  • Behavior of Concrete Integral Abutment Bridges
    2004
    Co-Authors: Jimin Huang, Catherine E French, Carol K Shield
    Abstract:

    The behavior of concrete Integral Abutment Bridges was investigated through a field experiment and a numerical parametric study. The field investigation focused on Bridge #55555 in Rochester, Minnesota, which was monitored from November 1996 to February 2004. Over 150 instruments were installed during construction of the Bridge to measure Abutment horizontal movement, Abutment rotation, Abutment pile strains, earth pressure, pier pile strains, prestressed girder strains, concrete deck strains, thermal gradients, and weather. The collected data were used to understand the behavior of Bridge #55555 due to the effects of temperature, creep and shrinkage. Two live load tests were conducted in 1997 and 1999, to examine the behavior of the Bridge under live load. The overall performance of the Integral Abutment Bridge was good. Bridge shortening was observed from the readings of different sensors. A steadily increasing tendency of average pile curvatures was observed from the measured data. Possible reasons were investigated through a time-dependent numerical analysis. A 3D finite element model of the test Bridge was developed which took into account soil-structure interaction. The model was calibrated using data collected from the truck tests and the data from the seasonal and daily temperature variations. A parametric study was conducted to extend the results of the test Bridge to other Integral Abutment Bridges with different design variables including pile foundation type, Bridge span and length, and orientation and length of wingwalls. Several design recommendations are made regarding the temperature range, use of predrilled holes around the piles, pile analysis method, and the applications of simplified design approaches for concrete Integral Abutment Bridges.

  • field performance of Integral Abutment Bridge
    Transportation Research Record, 2000
    Co-Authors: Andrew Lawver, Catherine E French, Carol K Shield
    Abstract:

    The behavior of an Integral Abutment Bridge near Rochester, Minnesota, was investigated from the beginning of construction through several years of service by monitoring more than 180 instruments that were installed in the Bridge during construction. The instrumentation was used to measure Abutment horizontal movement, Abutment rotation, Abutment pile strains, earth pressure behind Abutments, pier pile strains, prestressed girder strains, concrete deck strains, thermal gradients, steel reinforcement strains, girder displacements, approach panel settlement, frost depth, and weather. In addition to determining the seasonal and daily trends of Bridge behavior, live-load tests were conducted. All of the Bridge components performed within the design parameters. The effects from the environmental loading of solar radiation and changing ambient temperature were found to be as large as or larger than live-load effects. The Abutment was found to accommodate superstructure expansion and contraction through horizontal translation instead of rotation. The Abutment piles appeared to be deforming in double curvature, with measured pile strains on the approach panel side of the piles indicating the onset of yielding.

Carol K Shield - One of the best experts on this subject based on the ideXlab platform.

  • behavior of an Integral Abutment Bridge in minnesota us
    Structural Engineering International, 2011
    Co-Authors: Jimin Huang, Carol K Shield, Catherine E French
    Abstract:

    AbstractThe behavior of an Integral Abutment (IA) Bridge near Rochester, Minnesota, was investigated from the beginning of construction through approximately 7 years of service using data collected...

  • time dependent behavior of a concrete Integral Abutment Bridge
    Transportation Research Record, 2005
    Co-Authors: Jimin Huang, Carol K Shield, Catherine E French
    Abstract:

    Time-dependent behavior of an Integral Abutment Bridge near Rochester, Minnesota, was investigated from the beginning of construction through 7 years of service by using field data collected from more than 150 instruments installed in the Bridge during construction. Long-term Bridge shortening was observed from the readings of horizontal extensometers installed behind the Abutments. Measured pile curvatures steadily increased with time. To understand this unexpected Bridge behavior better, a time-dependent numerical study using the creep and shrinkage models from American Concrete Institute Committee 209 was conducted. The results obtained in this research indicate that concrete creep and shrinkage had a significant effect on the behavior of the concrete Integral Abutment Bridge over the course of the 7-year study.

  • Behavior of Concrete Integral Abutment Bridges
    2004
    Co-Authors: Jimin Huang, Catherine E French, Carol K Shield
    Abstract:

    The behavior of concrete Integral Abutment Bridges was investigated through a field experiment and a numerical parametric study. The field investigation focused on Bridge #55555 in Rochester, Minnesota, which was monitored from November 1996 to February 2004. Over 150 instruments were installed during construction of the Bridge to measure Abutment horizontal movement, Abutment rotation, Abutment pile strains, earth pressure, pier pile strains, prestressed girder strains, concrete deck strains, thermal gradients, and weather. The collected data were used to understand the behavior of Bridge #55555 due to the effects of temperature, creep and shrinkage. Two live load tests were conducted in 1997 and 1999, to examine the behavior of the Bridge under live load. The overall performance of the Integral Abutment Bridge was good. Bridge shortening was observed from the readings of different sensors. A steadily increasing tendency of average pile curvatures was observed from the measured data. Possible reasons were investigated through a time-dependent numerical analysis. A 3D finite element model of the test Bridge was developed which took into account soil-structure interaction. The model was calibrated using data collected from the truck tests and the data from the seasonal and daily temperature variations. A parametric study was conducted to extend the results of the test Bridge to other Integral Abutment Bridges with different design variables including pile foundation type, Bridge span and length, and orientation and length of wingwalls. Several design recommendations are made regarding the temperature range, use of predrilled holes around the piles, pile analysis method, and the applications of simplified design approaches for concrete Integral Abutment Bridges.

  • field performance of Integral Abutment Bridge
    Transportation Research Record, 2000
    Co-Authors: Andrew Lawver, Catherine E French, Carol K Shield
    Abstract:

    The behavior of an Integral Abutment Bridge near Rochester, Minnesota, was investigated from the beginning of construction through several years of service by monitoring more than 180 instruments that were installed in the Bridge during construction. The instrumentation was used to measure Abutment horizontal movement, Abutment rotation, Abutment pile strains, earth pressure behind Abutments, pier pile strains, prestressed girder strains, concrete deck strains, thermal gradients, steel reinforcement strains, girder displacements, approach panel settlement, frost depth, and weather. In addition to determining the seasonal and daily trends of Bridge behavior, live-load tests were conducted. All of the Bridge components performed within the design parameters. The effects from the environmental loading of solar radiation and changing ambient temperature were found to be as large as or larger than live-load effects. The Abutment was found to accommodate superstructure expansion and contraction through horizontal translation instead of rotation. The Abutment piles appeared to be deforming in double curvature, with measured pile strains on the approach panel side of the piles indicating the onset of yielding.