Structural assessment of a cable-stayed bridge

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Description

The structural health monitoring of a large cable-stayed bridge using ambient vibration measurement is summarized. The location of the bridge cannot, at this time, be revealed for confidentiality reason. The bridge is continuously monitored with an instrumentation system that has been collecting 16 channels of acceleration, wind pressure and temperature data over the past six years. The paper focuses on the analysis of two data sets collected in June 1995 and September 2000. Nonlinear data processing techniques such as higher-order statistical and temporal moments and wavelet transforms are presented to quantify the energy content of the signals in the time ... continued below

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10 p.

Creation Information

Hemez, F. M. (François M.) & Sohn, H. (Hoon) January 1, 2001.

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Description

The structural health monitoring of a large cable-stayed bridge using ambient vibration measurement is summarized. The location of the bridge cannot, at this time, be revealed for confidentiality reason. The bridge is continuously monitored with an instrumentation system that has been collecting 16 channels of acceleration, wind pressure and temperature data over the past six years. The paper focuses on the analysis of two data sets collected in June 1995 and September 2000. Nonlinear data processing techniques such as higher-order statistical and temporal moments and wavelet transforms are presented to quantify the energy content of the signals in the time and frequency domains. Then, linear modal models are fit to the data in order to translate the changes observed in terms of stiffness reduction or damping increase. It is concluded that structural change takes the form of a reduction in stiffness rather than an increase in damping. The discussion also illustrates typical issues encountered in structural health monitoring applications. These include collecting non-stationary signals, investigating a nonlinear response and dealing with environmental variability and changing operating conditions.

Physical Description

10 p.

Source

  • Submitted to: Proceedings of IMAC-XX: A Conference on Structural Dynamics, Feb, 4-7, 2002 ; Los Angeles, CA; Final version published in: Proceedings of SPIE - The International Society for Optical Engineering ; 2002; v.4753 II, p.1105-1112

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  • Report No.: LA-UR-01-5691
  • Grant Number: none
  • Office of Scientific & Technical Information Report Number: 975820
  • Archival Resource Key: ark:/67531/metadc934448

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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Creation Date

  • January 1, 2001

Added to The UNT Digital Library

  • Nov. 13, 2016, 7:26 p.m.

Description Last Updated

  • Dec. 12, 2016, 5:09 p.m.

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Hemez, F. M. (François M.) & Sohn, H. (Hoon). Structural assessment of a cable-stayed bridge, article, January 1, 2001; United States. (digital.library.unt.edu/ark:/67531/metadc934448/: accessed September 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.