Sensitivity of Live Load Distribution Factors to Vehicle Spacing
Authors: Michael D. Patrick, X. Sharon Huo [email protected], Jay A. Puckett, Mark Jablin, and Dennis MertzAuthor Affiliations
Publication: Journal of Bridge Engineering
Volume 11, Issue 1
Abstract
Two slab-on-girder bridge superstructures are analyzed using grillage models. Different live load placement configurations are investigated to determine the sensitivity of live load shear and moment to vehicle spacing. Results from both bridges show that the distribution factors are relatively insensitive to vehicle spacing. Therefore significant computational speedups are available when applying vehicle loads on an influence surface with a fixed spacing.
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Acknowledgment
The research reported herein was conducted with financial support from Transportation Research Board under Project No. UNSPECIFIEDNCHRP 12-62. The writers gratefully acknowledge this support.
References
American Association of State Highway and Transportation Officials (AASHTO). (2003). AASHTO standard specifications for highway bridges, 17th Ed., AASHTO, Washington, D.C.
American Association of State Highway and Transportation Officials (AASHTO). (2004). AASHTO LRFD bridge design specifications, 3rd Ed., AASHTO, Washington, D.C.
Information & Authors
Information
Published In
Journal of Bridge Engineering
Volume 11 • Issue 1 • January 2006
Pages: 131 - 134
Copyright
© 2006 ASCE.
History
Received: Oct 28, 2004
Accepted: Jan 25, 2005
Published online: Jan 1, 2006
Published in print: Jan 2006
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Authors
Affiliations
Michael D. Patrick
Graduate Research Assistant, Dept. of Civil and Environmental Engineering, Tennessee Technological Univ., P.O. Box 5015, Cookeville, TN 38505.
Associate Professor, Dept. of Civil and Environmental Engineering, Tennessee Technological Univ., P.O. Box 5015, Cookeville, TN 38505 (corresponding author). E-mail: [email protected]
Jay A. Puckett
Professor and Head, Dept. of Civil and Architectural Engineering, Univ. of Wyoming, Laramie, WY 82071.
Mark Jablin
Programming Engineer, BridgeTech, Inc., Laramie, WY 82070.
Dennis Mertz
Professor, Dept. of Civil and Environmental Engineering, Univ. of Delaware, Newark, DE 19716.
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