EXPERIMENTAL STUDY ON REHABILITATION OF BUCKLED CIRCULAR STEEL BRIDGE PIER BY EXTERNALLY BONDED CARBON FIBER SHEETS

Abstract

 This study is aimed at rapid seismic retrofitting using externally bonded carbon fiber sheets for the buckled circular steel bridge pier by earthquake. 3 test specimens were fabricated as follows: 1) the reference specimen, 2) the specimen reinforced by 7 layers of carbon fiber sheets, 3) the buckled specimen repaired by 7 layers of carbon fiber sheets. Test specimens were designed considering JSHB. The reversed cyclic horizontal load under the constant vertical load was applied. The horizontal strength and energy absorption rate were investigated experimentally. As a result, it was found that in the reinforced specimen, the increase in the horizontal strength was small, and the energy absorption rate increased about 20% for the reference specimen. In the repaired specimen, the horizontal strength and energy absorption rate were equivalent for the reference specimen.