钢骨混凝土梁柱框支剪力墙试验与恢复力模型研究  

Experimental study on the restoring force model of shear wall supported on the frame with steel reinforcing

作　　者：李国强[1] 崔大光[1] 

机构地区：[1]同济大学土木工程防灾国家重点实验室,上海200092

出　　处：《建筑结构学报》2008年第4期73-80,共8页Journal of Building Structures

基　　金：国家自然科学基金创新研究群体资助项目(50621062)

摘　　要：针对工程中经常使用的框支剪力墙结构,提出采用钢骨混凝土转换梁、框支柱对其加强,以改善结构抗震性能。进行了4榀1/4缩尺比例的模型试件拟静力试验,施加竖向荷载和单调及往复水平荷载,其中3榀试件采用钢骨混凝土转换梁和框支柱,1榀试件采用钢筋混凝土转换梁和框支柱。研究了结构承载力、变形、刚度、延性、耗能能力和破坏形态。试验结果表明,结构配置钢骨后各项性能指标均得到改善,延性系数可提高2.29-3.43倍。基于理论公式及试验数据,进一步建立了单调荷载和往复荷载作用下结构三折线型恢复力模型,模型考虑了强度退化和刚度退化,与试验结果较为吻合。The structure of shear wall supported on frame has been used widely. In order to improve the seismic performance of this structure, the paper proposed to use steel reinforced concrete transfer beams and frame-supported columns. Combined vertical load and monotonic and low cyclic lateral load pseudo-static tests were carried out on four one-forth-scale specimens, three consisting steel members encased in beams and columns. The structural load-bearing capacity, deformation, stiffness, ductility, energy dissipation capability and failure modes were discussed. The testing results indicate that the structural performance indexes are improved with steel reinforcement, and ductility coefficient is 2.29-3.43 times larger than that of structures without steel reinforcement. Based on the theoretic formulas and testing data, the three trilinear restoring models under monotonic and low cyclic load were established with degradation of strength and stiffness taken into account. The models show good agreement with the testing results.

关 键 词：框支剪力墙 钢骨混凝土 试验研究 恢复力模型 骨架曲线 滞回规则 

分 类 号：TU398.2[建筑科学—结构工程] TU317.1