Vibration testing of a steel girder bridge using cabled and wireless sensors  

作　　者：Dapeng ZHU Yang WANG James BROWNJOHN 

机构地区：[1]School of Civil and Environmental Engineering,Georgia Institute of Technology,Atlanta,GA 30332,USA [2]Department of Civil and Structural Engineering,The University of Sheffield,Sheffield,S13JD,UK

出　　处：《Frontiers of Structural and Civil Engineering》2011年第3期249-258,共10页结构与土木工程前沿（英文版）

基　　金：This research is partially sponsored by the National Science Foundation,under grant number CMMI-0928095(Program Manager:Dr.Shih-Chi Liu).

摘　　要：Being able to significantly reduce system installation time and cost,wireless sensing technology has attracted much interest in the structural health monitoring(SHM)community.This paper reports the field application of a wireless sensing system on a 4-span highway bridge located in Wayne,New Jersey in the US.Bridge vibration due to traffic and ambient excitation is measured.To enhance the signal-to-noise ratio,a low-noise high-gain signal conditioning module is developed for the wireless sensing system.Nineteen wireless and nineteen cabled accelerometers are first installed along the sidewalk of two neighboring bridge spans.The performance of the wireless sensing system is compared with the high-precision cabled sensing system.In the next series of testing,16 wireless accelerometers are installed under the deck of another bridge span,forming a 4×4 array.Operating deflection analysis is successfully conducted using the wireless measurement of traffic and ambient vibrations.

关 键 词：wireless sensing structural health monitoring(SHM) signal conditioning operating deflection analysis ambient vibration 

分 类 号：TN9[电子电信—信息与通信工程]