Field Testing and Analysis of CRC Deck Girder Bridges
Publication: Journal of Bridge Engineering
Volume 12, Issue 1
Abstract
This paper presents findings of field tests and analysis of two conventionally reinforced concrete (CRC) deck girder bridges designed in the 1950s. The bridges are in-service and exhibit diagonal cracks. Stirrup strains in the bridge girders at high shear regions were used to estimate distribution factors for shear. Impact factors based on the field tests are reported. Comparison of field measured responses with AASHTO factors was performed. Three-dimensional elastic finite-element analysis was employed to model the tested bridges and determine distribution factors specifically for shear. Eight-node shell elements were used to model the decks, diaphragms, bent caps, and girders. Beam elements were used to model columns under the bent caps. The analytically predicted distribution factors were compared with the field test data. Finally, the bridge finite-element models were employed to compare load distribution factors for shear computed using procedures in the AASHTO LRFD and Standard Specifications.
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Acknowledgments
The work presented in this paper was performed as part of a larger research program conducted at Oregon State University for the Oregon Department of Transportation. Mr. Steven M. Soltesz of ODOT coordinated all logistics for the field tests and his help is gratefully appreciated. The writers would like to thank Mr. William C. Farrow III, Mr. James D. Newell, and Mr. Brian S. Nicholas for their assistance in the field testing.
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Information & Authors
Information
Published In
Journal of Bridge Engineering
Volume 12 • Issue 1 • January 2007
Pages: 53 - 63
Copyright
© 2007 ASCE.
History
Received: Mar 22, 2005
Accepted: Jun 27, 2005
Published online: Jan 1, 2007
Published in print: Jan 2007
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