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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 Performance of Bridge Footings Designed to Current Standards
Author(s): Y. Xiao, M. J. N. Priestley, and F. Seible
Publication: Special Publication
Appears on pages(s): 131-158
Keywords: bridges; columns; design; ductility; flexural strength; footing; shear strength
Abstract:In order to provide experimental background for current seismic design of bridge footings, a 0.4:1 scale circular-column footing model was tested. The model was designed and constructed based on a footing of an actual prototype bridge which was built following current bridge design standards. The model pier was tested in a vertical cantilever condition with cyclic horizontal displacements and constant axial load applied to the top of the column. The pier was supported on rubber pads simulating the compressive flexibility of pile foundation, with high tensile strength bars simulating the compressive flexibility of pile foundation, with high horizontal displacement, the pier developed a satisfactory hysteretic response with a full plastic hinge formed at the bottom of the column. However, test results and theoretical analyses revealed potential problems in current bridge footing design, in particular, the lack of the column/footing joint shear design as well as non-conservative flexural and shear designs which are based on full effectiveness of the entire footing width.
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