钢筋混凝土框架柱增设剪力墙加固抗震性能分析  

Seismic behavior analysis of RC frame columns reinforced by additional RC shear wall

作　　者：田芃[1] 时旭东[2,3] 张天申[2,3] 王元清[2,3] 张延年[1] 杨光[1] 

机构地区：[1]沈阳建筑大学土木工程学院,辽宁沈阳110168 [2]清华大学土木工程安全与耐久教育部重点实验室,北京100084 [3]清华大学结构工程检测中心,北京100084

出　　处：《四川建筑科学研究》2014年第2期74-78,共5页Sichuan Building Science

基　　金："十一五"国家科技支撑计划重大项目课题(2006BAJ03A02)

摘　　要：为了研究轴压比、剪力墙厚度及长度对增设剪力墙加固的钢筋混凝土框架柱在单调荷载作用下抗震性能的影响,在考虑加固柱的二次受力特性的前提下,采用数值模拟的方法分析加固柱的P-Δ曲线和刚度退化曲线。结果表明:随着轴压比的增大,加固柱抗侧承载力增加,刚度、延性降低;剪力墙厚度及长度的增大使加固柱的承载力得到了提高,但高轴压比下,通过增加剪力墙厚度及长度加固钢筋混凝土框架柱会使加固后柱的延性降低,刚度退化程度加大。in order to analyze the influence of axial compression ratio,thickness of shear wall and length of additional shear wall on the seismic behavior of reinforced RC frame columns strengthening by additional shear wall, which the columns were under monotonous load. Based on the premise of considering the secondary mechanical characteristics of reinforced columns,the method of numerical simulation was adopted to do analysis of P - △ curve of reinforced columns and curve of stiffness degradation. The results indicated that the load-carrying capacity of reinforced columns increased with the increase of axial compression ratio,while stiffness and ductility decreased. The bearing capacity of reinforced columns were also improved with the increase of thickness arid length of shear wall, but strengthening RC frame columns by increasing the thickness and length of shear wall raider high axial compression ratio reduced the ductility of the specimen and degree of stiffness degradation increased.

关 键 词：加固 增设剪力墙 有限元分析 P-△曲线 刚度退化 

分 类 号：TU375[建筑科学—结构工程]