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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Seismic Modeling of Long-Span Bridges
Author(s): W. G. Godden
Publication: Special Publication
Appears on pages(s): 107-124
Keywords: (structures ); bridges cable-supported structures;
curved beams; dynamic response; dynamic structural analysis;
earthquake resistant structures; failure; highway
Abstract:This paper discusses shaking table tests conducted on models of two long-span curved highway bridges to study seismic response. The first is a microconcrete model study of a multi-span highway overcrossing of the type that failed in the 1971 San Fernando earthquake. This shows the predominant influence of the expansion joints in the system on gross dynamic behavior and on the failure load. The second is an elastic model study of a proposed single-span cable-stayed curved box girder bridge designed without expansion joints and cast integrally with the abutments. This shows the small damping in such a system, the influence of cable vibrations on the overall dynamic behavior, the degree to which linear dynamic analysis is applicable in determining seismic response and the efficiency of such a design in resistin horizontal ground motions.
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