Dynamic Response of a Highway Bridge Subjected to Moving Vehicles
Publication: Journal of Bridge Engineering
Volume 13, Issue 5
Abstract
Several full-scale load tests were performed on a selected Florida highway bridge. The bridge was dynamically excited by two fully loaded trucks, and the strain, acceleration, and displacement at selected points were recorded for the investigation of the bridge’s dynamic response. Experimental data were compared with simplified vehicle and bridge finite-element models. The vehicle was represented as a three-dimensional mass–spring–damper system with of freedom, and the bridge was modeled as a combination of plate and beam elements that characterize the slab and girders, respectively. The equations of motion were formulated with physical components for the vehicle and modal components for the bridge. The coupled equations were solved using a central difference method. It was found that the numerical analysis matched well with the experimental data and was used to successfully explain critical dynamic phenomena observed during the testing. Impact factors for this tested bridge were thoroughly investigated by using these models.
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Acknowledgments
The study reported in this paper was supported by a grant from the Florida Department of Transportation (Contract No. BD 493). Opinions and views expressed in this paper are those of the writers and are not necessarily those of the sponsoring agency. The writers would like to express their appreciation for this generous support.
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Information & Authors
Information
Published In
Journal of Bridge Engineering
Volume 13 • Issue 5 • September 2008
Pages: 439 - 448
Copyright
© 2008 ASCE.
History
Received: Dec 5, 2006
Accepted: Feb 15, 2008
Published online: Sep 1, 2008
Published in print: Sep 2008
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