Experimental Assessment of Dynamic Responses Induced in Concrete Bridges by Permit Vehicles
Publication: Journal of Bridge Engineering
Volume 16, Issue 1
Abstract
Results from experimental testing of three permit vehicles are presented in the paper. The selected heavy vehicles, which require permits from state DOTs, included two tractor-trailer systems and a midsize crane. The vehicles were experimentally tested on popular existing speed bumps and on a representative highway bridge. The selected bridge was a reinforced-concrete structure constructed in 1999, located on the U.S. 90 in Northwest Florida. The bridge approach depression, combined with a distinct joint gap between the asphalt pavement and the concrete deck, triggered significant dynamic responses of the vehicle-bridge system. Similar dynamic vibrations were observed and recorded when the permit vehicles were driven over the speed bumps. Time histories of relative displacements, accelerations, and strains for selected locations on the vehicle-bridge system were recorded. The analysis of experimental data allowed for assessment of actual dynamic interactions between the vehicles and the speed bumps as well as dynamic load allowance factors for the selected bridge.
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Acknowledgments
The study reported in this paper was supported by a contract from the Florida Department of Transportation titled “Investigation of Impact Factors for Permit Vehicles,” Contract No. UNSPECIFIEDBD 543. Thanks are due to the Research Center of the Florida Department of Transportation for generous support of this study. All experimental tests were professionally conducted by Stephen Eudy, William Potter, and Paul Tighe from FDOT Structures Laboratory at Broadmoor Estate (speed bump calibration and testing) and on the Bridge No. 500133 over Mosquito Creek on U.S. 90. The guidance, comments, advice, and technical support provided by this group of professionals are highly appreciated. Thanks are also due to Blueprint 2000 office in Tallahassee for making Broadmoor Estate available free of charge for speed bump testing. Opinions and views expressed in this paper are those of the writers and not necessarily those of the sponsoring agency.
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Information & Authors
Information
Published In
Journal of Bridge Engineering
Volume 16 • Issue 1 • January 2011
Pages: 108 - 116
Copyright
© 2011 ASCE.
History
Received: Jul 15, 2009
Accepted: Mar 10, 2010
Published online: Mar 16, 2010
Published in print: Jan 2011
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