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Proceedings Paper

Health monitoring and fatigue damage assessment of the bridge deck sections
Author(s): Zhao-Xia Li; Hung-tin Tommy Chan; Jan Ming Ko
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Paper Abstract

Based on the real-time monitoring data, a fatigue damage model using continuous damage mechanics and a methodology and strategy for evaluating fatigue damage and possible critical locations of local fatigue on bridge-deck sections are developed. The proposed local damage model to evaluate the fatigue damage of bridge-deck sections allows fatigue damage to be considered at a continuum scale as a deteriorating process with its physical mechanism such as fatigue crack initiation and growth. Therefore the fatigue damage variable associates not only cycles of stress range on the accumulating process of fatigue, but also directly associates the state of deterioration and the mechanics behavior. The effective stress range for the variable-amplitude stress spectrum due to traffic load is used to evaluate the fatigue strength of the bridge-deck section at different locations, by which possible location of critical fatigue failure can be primarily determined. As a typical case to use the method and strategy proposed in this paper, fatigue damage assessment and the detection of possible critical location of fatigue in a deck section of the Tsing Ma Bridge are carried out by using strain-time history acquired by the bridge structural health monitoring system.

Paper Details

Date Published: 9 June 2000
PDF: 12 pages
Proc. SPIE 3995, Nondestructive Evaluation of Highways, Utilities, and Pipelines IV, (9 June 2000); doi: 10.1117/12.387826
Show Author Affiliations
Zhao-Xia Li, Hong Kong Polytechnic Univ. (China)
Hung-tin Tommy Chan, Hong Kong Polytechnic Univ. (Hong Kong)
Jan Ming Ko, Hong Kong Polytechnic Univ. (Hong Kong)

Published in SPIE Proceedings Vol. 3995:
Nondestructive Evaluation of Highways, Utilities, and Pipelines IV
A. Emin Aktan; Stephen R. Gosselin; Stephen R. Gosselin, Editor(s)

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