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Proceedings Paper

Fatigue evaluation for Tsing Ma Bridge using structural health monitoring data
Author(s): Hung-tin Tommy Chan; Jan Ming Ko; Zhao-Xia Li
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Paper Abstract

Fatigue assessment for the Tsing Ma Bridge (TMB) are presented based on the British standard BS5400 and the real-time structural health monitoring data under railway loading. TMB, as an essential portion of transport network for the Hong Kong airport, is the longest suspension bridge in the world carrying both highway and railway traffic. The bridge design has been mainly based on BS5400. A structural health monitoring system - Wind and Structural Health Monitoring System (WASHMS) for TMB has been operated since the bridge commissioning in May 1997. In order to assess the fatigue behavior of TMB under railway loading, strain gauges were installed on the bridge deck to measure the strain-time histories as soon as the bridge is loaded by a standard railway loading due to the service of an actual train. The strain-time history data at the critical members are then used to determine the stress spectrum, of which the rainflow method recommended for railway bridges by BS5400 is applied to count cycles of stress range. Miner's law is employed to evaluate fatigue damage and remaining service life of the bridge. The evaluated results of fatigue damage and remaining service life would help us to well understand about the fatigue design of the bridge and status in fatigue accumulation.

Paper Details

Date Published: 3 August 2001
PDF: 12 pages
Proc. SPIE 4337, Health Monitoring and Management of Civil Infrastructure Systems, (3 August 2001);
Show Author Affiliations
Hung-tin Tommy Chan, Hong Kong Polytechnic Univ. (Hong Kong)
Jan Ming Ko, Hong Kong Polytechnic Univ. (Hong Kong)
Zhao-Xia Li, Southeast Univ. (China)

Published in SPIE Proceedings Vol. 4337:
Health Monitoring and Management of Civil Infrastructure Systems
Steven B. Chase; A. Emin Aktan, Editor(s)

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