Aspects of Seismic Evaluation and Retrofit of Canadian Bridges

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Title: Aspects of Seismic Evaluation and Retrofit of Canadian Bridges

Author(s): D. Mitchell

Publication: Special Publication

Volume: 197

Issue:

Appears on pages(s): 169-190

Keywords: bridges; codes; ductility; earthquake-resistant structures; evaluation; reinforced concrete; retrofit

Date: 4/1/2002

Abstract:
The approach for seismic evaluation and guidelines for seismic retrofit in the Canadian Highway Bridge Design code are presented. A number of common seismic deficiencies found in bridge structures are discussed. The reversed cyclic loading behavior of columns with lap splices at their bases, outrigger beam-column connections and columns with hinges at their bases are discussed. Methods suitable for retrofit of a number these deficiencies are described. The responses of these elements after these retrofit strategies had been carried out are also presented.