基于模型试验的既有框架结构抗震性能研究  

Experimental-based Study on Seismic Performance of Existing Frame Structure

作　　者：尹保江 吉飞宇 程绍革 陈磊 杜媛媛 Yin Bao-jiang;Ji Fei-yu;Cheng Shao-ge;Chen Lei;Du Yuan-yuan(China Academy of Building Research Co.Ltd.,Beijing,100013,China;Chongqing University,Chongqing 400045,China)

机构地区：[1]中国建筑科学研究院有限公司,北京100013 [2]重庆大学土木工程学院,重庆400045

出　　处：《工程抗震与加固改造》2018年第6期39-44,共6页Earthquake Resistant Engineering and Retrofitting

基　　金：国家重点研发计划(2016YFC0700706-03);中国建筑科学研究院应用基金项目(20140122330730032)

摘　　要：通过有限元与试验相结合的方式,研究既有框架结构在抗震性能方面存在的问题。按照《工业与民用建筑抗震设计规范(试行)》(TJ11-74)设计、制作了1/2缩尺的双层框架结构模型。并对其进行低周反复荷载试验,研究其破坏形态、滞回曲线、骨架曲线、刚度退化曲线、抗震耗能系数等。试验结果表明:采用74规范设计框架结构在反复荷载作用下梁柱节点区域发生剪切破坏,节点破坏前,塑性变形主要集中在底层,节点破坏后,二层柱绕破坏节点产生刚性转动,层间变形异常增大,导致结构破坏加剧。The problems of the existing frame structure in the seismic performance are studied based on experimental research and finite element.A 1/2 scale frame structure model,which is designed and constructed according to the seismic design code for industrial and civil buildings (TJ 11-74 ),is carried out low-cyclic reversed loading test.The cracking and failure patterns,hysteretic curves, skeleton curves,stiffness degradation curve,energy dissipation coefficient are analyzed.The results show that,the shear failure of the frame structure under cyclic loading is in the beam column joint area.Before the failure of the joints,the plastic deformation is mainly concentrated on the bottom layer.After the failure of the joints,the two layers of columns produce rigid rotation around the failure joints,and the abnormal deformation between the layers increases,which results in structural damage.

关 键 词：既有框架结构 低周反复荷载试验 抗震性能 有限元 

分 类 号：TU317.1[建筑科学—结构工程]