SEISMIC PERFORMANCE OF CFRP-RETROFITTED RECTANGULAR RC COLUMNS UNDER BI-DIRECTIONAL EARTHQUAKES
Considerable studies have been conducted on the seismic performance of fiber-reinforced polymer(FRP)retrofitted reinforced concrete(RC)columns over the last two decades.Most of the existing studies focused on the principal loading direction.However,the research on seismic performance of FRP-retrofitted RC columns under multi-directional loading remains limited.This paper presents an experimental investigation on carbon fiber-reinforced polymer(CFRP)retofitted rectangular RC columns subjected to combined constant aixal load and cyclic lateral loading in different directions to simulate the bi-directional earthquake actions.Five full-scale rectangular RC columns were retrofitted by wrapping 3 layers of CFRP sheet laterally in the potential plastic hinge zones and then tested.The lateral loading directions were changed from 0° to 30°,60°,75° and 90°.The test results indicated that the direction of seismic loads have significant influence on the seismic performance of FRP-retrofitted rectangular RC columns.The lateral drift and shear resistance capacities were generally reduced with an increase of angle of lateral loading directions.The shear strength of the FRP-retrofitted rectangular RC columns was generally consistent with ellipse relationship.
Reinforced concrete (RC) Columns Fiber-reinforced polymer (FRP) Seismic performance test RC column retrofitting
Z.Y.Wang D.Y.Wang
School of Civil Engineering,Harbin Institute of Technology,Harbin,China
国际会议
新加坡
英文
1-5
2017-07-19（万方平台首次上网日期，不代表论文的发表时间）