Impact in Truss Bridge Due to Freight Trains

The dynamic responses of a railway bridge members due to vehicle-track-bridge interaction were investigated for the effects of vertical and lateral track irregularities, approach track quality, and bridge damping. In each case, a train consisting of three vehicles moving at constant speed was simula...

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Bibliographic Details
Published in:Journal of engineering mechanics 1985-01, Vol.111 (2), p.159-174
Main Authors: Chu, Kuang-Han, Garg, Vijay K, Bhatti, Majeed H
Format: Article
Language:English
Subjects:
Applied sciences
Bridges
Buildings. Public works
Exact sciences and technology
TECHNICAL PAPERS
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Summary:The dynamic responses of a railway bridge members due to vehicle-track-bridge interaction were investigated for the effects of vertical and lateral track irregularities, approach track quality, and bridge damping. In each case, a train consisting of three vehicles moving at constant speed was simulated traveling on the bridge. It was found that: (1) Greater approach irregularities produce higher impact factors and dynamic forces in bridge members; (2) impact factors in members with low static stress are high, but the dynamic stresses produced are low; (3) in general, impact factors reduce slightly due to bridge damping; and (4) the dynamic forces in lower lateral bracing members are small as compared to their allowable values.
ISSN:0733-9399
1943-7889
DOI:10.1061/(ASCE)0733-9399(1985)111:2(159)