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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 Retrofit of Existing Bridge Columns with Hinges
Author(s): A. Griezic, W. D. Cook, and D. Mitchell
Publication: Special Publication
Appears on pages(s): 205-234
Keywords: columns (supports); concrete hinges; earthquake-resistant structures; retrofit; reversed cyclic loading; tests
Abstract:A series of five bridge columns with concrete hinges at their bases were tested under reversed cyclic loading to determine their behavior. A method for predicting the responses, which accounts for the effects of confinement on the concrete hinge region and yield penetration is presented. A simple retrofit technique for two-way hinges, using dry-pack grout, was investigated. A method for retrofitting one-way hinges by using an added reinforced concrete footing block, together with concrete in-fitted steel jacketing was tested. The reversed cyclic loading response, before and after retrofit are compared and means of both designing the retrofit and predicting the responses are presented.
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