方钢管混凝土平面框架的恢复力模型研究  

Study on restoring force model of concrete filled square steel tube planar frames

作　　者：王先铁[1] 周超[1] 马尤苏夫 杨航东 王连坤[2] 

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055 [2]五邑大学土木建筑学院,广东江门529020

出　　处：《地震工程与工程振动》2014年第5期94-99,共6页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金项目(51108369;51208385);教育部博士点新教师基金项目(20116120120008);陕西省科技新星科研项目(2013KJXX-54)

摘　　要：为了研究方钢管混凝土框架的滞回性能,进行了3榀采用穿芯高强螺栓-端板节点的方钢管混凝土柱-钢梁平面框架拟静力试验,分析了轴压比和梁柱线刚度比对框架抗震性能的影响。结果表明:试件的滞回曲线均为饱满的梭形;增大轴压比,可以提高框架的耗能能力,但降低了框架的延性和水平承载力;增大梁柱线刚度比,可以提高框架的水平承载力,但会降低框架的延性和耗能能力。在试验研究基础上,结合理论分析,提出了适用于穿芯高强螺栓-端板节点的方钢管混凝土柱-钢梁平面框架的简化恢复力模型。恢复力模型所得滞回曲线与试验滞回曲线吻合较好。In order to study the hysteretic behavior of concrete filled square steel tube frame,three concrete filled square steel tube（ CFT） columns and steel beam planar frame with through bolt-endplate beam-column connection were tested under reversed cyclic lateral loads. The influence of the axial load ratio and the linear stiffness ratio of steel beam to column on the frame seismic behavior was investigated. Results show that the hysteretic curves of all the specimens present a plump shuttle shape. With the increase of the axial load ratio,the planar frame experiences a progressive reduction in the frame ductility and lateral ultimate capacity,while its energy dissipation capacity enhances. With the increase of the linear stiffness ratio of steel beam to column,the ductility and the energy dissipation capacity become low,but the lateral ultimate capacity becomes high. Based on the experimental results and the analytical results,the restoring force model is proposed. The results show that the calculated restoring force model agrees well with the experimental results.

关 键 词：方钢管混凝土框架 穿芯高强螺栓-端板节点 滞回性能 骨架曲线 恢复力模型 

分 类 号：TU37[建筑科学—结构工程] TU398