增大截面和碳纤维布包裹复合加固锈蚀钢筋混凝土柱的抗震性能研究  

Experimental study on seismic behavior of corroded reinforced concrete columns strengthened with concrete jacket and CFRP

作　　者：李金波[1] 贡金鑫[1] 王利欢[1] 

机构地区：[1]大连理工大学,辽宁大连116024

出　　处：《土木工程学报》2009年第4期17-26,共10页China Civil Engineering Journal

基　　金：教育部创新团队资助(IRT0518)

摘　　要：试验对不同锈蚀程度的钢筋混凝土柱使用不同的加固方法进行抗震加固,研究碳纤维布包裹与增大混凝土截面复合加固对锈蚀钢筋混凝土柱的抗震性能影响,考虑轴压比、碳纤维布用量、锈蚀量和加固钢筋用量等因素对加固效果的影响,并编制程序对复合加固锈蚀柱的骨架曲线进行数值模拟,对轴压比、碳纤维布用量、锈蚀量和加固钢筋用量对加固效果的影响进行分析。研究表明,碳纤维布包裹与增大混凝土截面复合加固锈蚀钢筋混凝土构件是一种非常有效的方法,能改善试件的延性,提高加固试件的极限承载力和耗能能力,与仅用增大截面加固的试件相比,复合加固试件抗震性能改善非常明显。An experimental investigation of the seismic resistance behavior of strengthened corroded reinforced concrete （RC） columns with concrete jacket and Carbon Fiber Reinforced Polymer （CFRP） is presented. Cyclic horizontal loading test was carried out with RC columns damaged by different degrees of rebar corrosion and strengthened with different methods under different axial load levels, with variable axial load level, amount of restrengthening bars and CFRP, and degree of corrosion. Based on the stress and strain relationship of RC columns strengthened with concrete jacket and CFRP, a computer code was developed to simulate the skeleton curve of the strengthened columns and the effects of such factors as axial load ratio, amount of restrengthenin bars and CFRP, and degree of corrosion on the strengthening performance were analyzed. Test results indicate that the strengthened reinforced concrete columns with concrete jacket and CFRP is effective, with remarkable improvement in ductility, load-carrying capacity and hysteretic characteristics. Obviously, retrofitting corroded reinforced concrete columns with both concrete jacket and CFRP is more effective than with concrete jacket alone.

关 键 词：钢筋混凝土 锈蚀 加固 滞回特性 增大截面 CFRP 

分 类 号：TU375.3[建筑科学—结构工程]