Dynamic Load Monitoring of the Tsing-Ma Bridge Using a High
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by Queensland University of Technology ePrints Archive Dynamic load monitoring of the Tsing Ma Bridge using a high-speed FBG sensor system Authors: L.K. Cheng3, S.Y. Liu1, B.O. Guan1, W.H. Chung1, T.H.T. Chan2, T.L. Chan2, J.J.M. Groote Schaarsberg3, B.W. Oostdijk3 and H.Y. Tam1 Cheng, L.K. and Liu, S.Y. and Guan, B.O. and Chung, W.H. and Chan, Tommy H.T. and Schaarsberg, G. and Oostdijk, B.W. and Tam, H.Y. (2004) Dynamic load monitoring of the Tsing Ma Bridge using a high-speed FBG sensor system. In Proceedings 2nd European Workshop on Structural Health Monitoring, Munich, Germany. Copyright 2004 (The authors) 1 1. ABSTRACT Sensors for strain measurement are indispensable for structure monitoring. Fiber optic sensors based on Fiber Bragg Grating (FBG) technology are found to be suitable for strain sensing and have a number of advantages compared to conventional strain gauges. Recently, we carried out a field trial with a FBG sensor array system on the world’s longest span suspension bridge carrying both trains and regular road traffic (The Tsing Ma Bridge in Hong Kong). The experiment was carried out with a high-speed dense-channel demultiplexing/interrogation system for FBG sensor arrays (DC to ~20 kHz for all channels simultaneously). This system is originally developed for the detection of high-speed events (vibration, impact location and acoustic emission), but in this field experiment the high readout frequency has been used for noise reduction by averaging to achieve sub-pm resolution.
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