（中铁第四勘察设计院集团有限公司， 武汉 430063）

［摘要］为研究不同CFRP加固方式对震损钢筋混凝土柱抗震性能的影响规律，基于现行设计规范，采用高强灌浆料加固、横向CFRP套箍加固、横向CFRP套箍结合纵向粘贴CFRP加固3种方式对3个震损钢筋混凝土柱试件进行加固修复，并开展加固钢筋混凝土柱低周反复荷载试验，考察加固试件的抗震性能，并对比分析不同加固方式对试件抗震性能的影响规律。研究结果表明：经过3种加固方式修复的震损试件在压弯剪复合受力下均表现为弯曲型破坏，符合“强剪弱弯”的抗震设计要求；采用CFRP加固后震损试件的延性得到明显改善，刚度退化与强度退化趋于均匀，但承载能力与初始刚度均低于加固前试件。3个加固试件中采用横向CFRP套箍加固的试件具有较高的延性与承载力恢复水平，采用横向CFRP套箍结合纵向粘结CFRP加固的试件具有较高的承载力与刚度。

［关键词］CFRP加固；震损；钢筋混凝土柱；抗震性能；高强灌浆料；横向套箍；强剪弱弯

中图分类号：TU375-3文献标识码：A文章编号：1002-848X(2021)10-0104-07

Experimental study on seismic performance of seismic-damaged reinforced concrete column strengthened by CFRP

WANG Jialei

（China Railway Siyuan Survey and Design Group Co., Ltd., Wuhan 430063, China）

Abstract:In order to study the influence of different CFRP reinforcement methods on the seismic performance of seismic-damaged reinforced concrete columns. Based on the current design codes, three seismic-damaged reinforced concrete column specimens were reinforced and repaired by three methods: high-strength grouting reinforcement, transverse CFRP hoop reinforcement, and transverse CFRP hoop reinforcement combined with longitudinal paste CFRP reinforcement. A low-cycle repeated load test of reinforced concrete columns after reinforcement was carried out to investigate the seismic performance of the reinforced specimens, and the influence of different reinforcement methods on the seismic performance of specimens was compared and analyzed. The research results show that the seismic-damaged specimens repaired by the three reinforcement methods all show bending failure under the combined stress of compression, bending and shear, which meets the seismic design requirements of “strong shear and weak bending”. The ductility of the seismic-damaged specimens strengthened by CFRP is significantly improved, and the stiffness degradation and strength degradation tend to be uniform, but the bearing capacity and initial stiffness are lower than the specimens before reinforcement. Among the three reinforced specimens, the specimens strengthen by transverse CFRP hoop have a higher level of ductility and bearing capacity recovery, and the specimens strengthen by transverse CFRP hoop combined with longitudinal paste CFRP have higher bearing capacity and rigidity.

Keywords:CFRP strengthening;seismic-damage;reinforced concrete column;seismic performance;high-strength grouting;transverse hoop;strong shear and weak bending

作者简介：王家磊，硕士，高级工程师，Email：tsywjl@foxmail.com。