Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/11764
Title: Fatigue analysis of long-span suspension bridges under multiple loading : case study
Authors: Chen, ZW
Xu, YL 
Xia, Y 
Li, Q
Wong, KY
Keywords: Dynamic stress
Fatigue
Highway loading
Railway loading
Structural health monitoring
Suspension bridges
Wind loading
Issue Date: 2011
Publisher: Pergamon Press
Source: Engineering structures, 2011, v. 33, no. 12, p. 3246-3256 How to cite?
Journal: Engineering structures 
Abstract: Long-span suspension bridges are often subject to multiple types of dynamic loads, especially those located in wind-prone regions and carrying both trains and road vehicles. Fatigue assessment shall be performed to ensure the safety and functionality of the bridges. This paper proposes a framework for fatigue analysis of a long-span suspension bridge under multiple loading by integrating computer simulation with structural health monitoring system. By taking the Tsing Ma Bridge in Hong Kong as an example, a computationally efficient engineering approach is first proposed for dynamic stress analysis of the bridge under railway, highway and wind loading. The fatigue-critical locations are then determined for key bridge components, and databases of the dynamic stress responses at the critical locations are established. The time histories of dynamic stresses induced by individual loading during the design life of the bridge are generated based on the databases. The corresponding stress time histories due to the combined action of multiple loading are also compiled. Finally, fatigue analysis is performed to compute the cumulative fatigue damage over the design life of 120 years. The results indicate that it is necessary to consider the combined effect of multiple loading in the fatigue analysis of long-span suspension bridges.
URI: http://hdl.handle.net/10397/11764
ISSN: 0141-0296
EISSN: 1873-7323
DOI: 10.1016/j.engstruct.2011.08.027
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