Service Load Test of 1:3 Scale Shell Bridge Model
Publication: Journal of Structural Engineering
Volume 122, Issue 2
Abstract
Due to lack of maintenance, increase in legal loads, and increased traffic volumes, several thousands of deficient bridges in the surface transportation system needed to be rehabilitated or replaced. One potential solution to several of today's bridge problems is the shell bridge. This system consists of integrated shell-deck concrete segments that are posttensioned together to form a bridge. A 1:3 shell-bridge model was fabricated and service-load tested to determine its behavior when subjected to various load patterns. The model was tested under the effect of single concentrated loads as well as simulated American Association of State Highway and Transportation Officials (AASHTO) HS20-44 truck loading. The model was analyzed using the ANSYS finite element program. The buckling potential due to the posttensioning forces was also investigated with ANSYS. Fabrication and construction of the 1:3 model verified the feasibility of constructing segmental shell bridges. The integrated shell-deck section exhibited high stiffness and yet is lighter than conventional systems.
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References
1.
American Association of State Highway and Transportation Officials (1989). Standard specifications for highway bridges, 14th Ed., Washington, D.C.
2.
Andrey, D. (1987). “Shell structures for emergency bypass bridges,” MS thesis, Iowa State Univ., Ames, Iowa.
3.
DeSalvo, G. J., and Swanson, J. S. (1991). ANSYS engineering analysis system-user's manual. Vols. I & II. Revision 4.4 . Swanson Analysis Systems, Houston, Pa.
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Fanous, F., Andrey, D., and Klaiber, F. W. (1988). “Analytical investigation of shell structures utilized as emergency bypass bridges.”Transp. Res. Rec., Paper No. 870417, Nat. Acad. of Sci., Washington, D.C.
5.
Wassef, W. (1991). “Analytical and experimental investigation of shell structures utilized as bridges,” PhD dissertation, Iowa State Univ., Ames, Iowa.
Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 122 • Issue 2 • February 1996
Pages: 210 - 216
Copyright
Copyright © 1996 American Society of Civil Engineers.
History
Published online: Feb 1, 1996
Published in print: Feb 1996
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