Dynamic Stress Analysis of Long Suspension Bridges under Wind, Railway, and Highway Loadings
Publication: Journal of Bridge Engineering
Volume 16, Issue 3
Abstract
Computation of the dynamic stress of long suspension bridges under multiloadings is essential for either the strength or fatigue assessment of the bridge. This paper presents a framework for dynamic stress analysis of long suspension bridges under wind, railway, and highway loadings. The bridge, trains, and road vehicles are respectively modeled using the finite-element method (FEM). The connections between the bridge and trains and between the bridge and road vehicles are respectively considered in terms of wheel-rail and tire-road surface contact conditions. The spatial distributions of both buffeting forces and self-excited forces over the bridge deck surface are considered. The Tsing Ma suspension bridge and the field measurement data recorded by a wind and structural health monitoring system (WASHMS) installed in the bridge are utilized as a case study to examine the proposed framework. The information on the concerned loadings measured by the WASHMS is taken as inputs for the computation simulation, and the computed stress responses are compared with the measured ones. The results show that running trains play a predominant role in bridge stress responses compared with running road vehicles and fluctuating wind loading.
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Acknowledgments
The authors wish to acknowledge the financial support from the Research Grants Council of the Hong Kong UNSPECIFIEDPolyU 5327/08E and the National Nature Science Foundation of China UNSPECIFIED(Grant No. 90715008). Sincere thanks should go to the Highways Department of Hong Kong for providing the authors with the field measurement data. Any opinions and concluding remarks presented in this paper are entirely those of the authors.
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Information & Authors
Information
Published In
Journal of Bridge Engineering
Volume 16 • Issue 3 • May 2011
Pages: 383 - 391
Copyright
© 2011 American Society of Civil Engineers.
History
Received: May 9, 2009
Accepted: Dec 18, 2009
Published online: Jan 5, 2011
Published in print: May 1, 2011
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