Title:
Seismic Retrofit of Existing Bridge Columns with Hinges
Author(s):
A. Griezic, W. D. Cook, and D. Mitchell
Publication:
Symposium Paper
Volume:
187
Issue:
Appears on pages(s):
205-234
Keywords:
columns (supports); concrete hinges; earthquake-resistant structures; retrofit; reversed cyclic loading; tests
DOI:
10.14359/5600
Date:
6/1/1999
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.