Nondestructive assessment of timber bridges using a vibration-based method

Xiping Wang, James P. Wacker, Robert J. Ross, Brian K. Brashaw

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations

Abstract

This paper describes an effort to develop a global dynamic testing technique for evaluating the overall stiffness of timber bridge superstructures. A forced vibration method was used to measure the natural frequency of single-span timber bridges in the laboratory and field. An analytical model based on, simple beam theory was proposed to represent the relationship between the first bending mode frequency and bridge stiffness (characterized as EI product). The results indicated that the forced vibration method has potential for quickly assessing superstructure stiffness of timber bridges, but improvements must be made in measurement system to correctly identify the first bending mode frequency in bridges in the field. The beam theory model was found to fit the physics of the superstructure of single-span timber bridges and could be used to correlate first bending frequency to global stiffness if appropriate system parameters are identified.

Original languageEnglish (US)
Title of host publicationMetropolis and Beyond - Proceedings of the 2005 Structures Congress and the 2005 Forensic Engineering Symposium
Pages381-392
Number of pages12
StatePublished - Nov 15 2005
Event2005 Structures Congress and the 2005 Forensic Engineering Symposium - Metropolis and Beyond - New York, NY, United States
Duration: Apr 20 2005Apr 24 2005

Other

Other2005 Structures Congress and the 2005 Forensic Engineering Symposium - Metropolis and Beyond
CountryUnited States
CityNew York, NY
Period4/20/054/24/05

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