EFFECTS OF UNLOADING STIFFNESS DEGENERATION OF PLASTIC HINGE MODEL ON DYNAMIC CHARACTERISTICS OF RC BUILDING

摘要：

In order to study the effects of unloading stiffness degeneration of plastic hinge model of reinforced concrete structures during seismic input waves,elastic-plastic dynamic analysis of a 7-story RC frame under earthquake loading was performed in this paper. The analysis results show that,the concrete on the fringe of the cross section will be crack and peel of under cyclic load and both load and unload stiffness of plastic hinge degenerate due to decrease cross section area; dissipated energy of the plastic hinge will be overrated without considering unload stiffness degeneration of unload stiffness and the acceleration response of the structure will be underrated meanwhile; the relative story drift will be enlarged because of the unload stiffness degeneration of plastic hinge.

关键词： Reinforced concrete building Plastic hinge Unload stiffness Dynamic characteristics

作者: Liu-Han Wen Hei Sha Jian Su Fu-Lin Zhou

作者单位: Earthquake Engineering Research and Testing Center,Guangzhou University,Guangzhou 510405,P.R. China College of Civil Engineering,Hunan University,Changsha 410082,P.R.China Earthquake Engineering Research and Testing Center,Guangzhou University,Guangzhou 510405,P.R. China

会议类型: 国际会议

会议名称: The Eleventh International Symposium on Structural Engineering(第十一届结构工程国际研讨会)

会议地点: 广州

会议语种:英文

页码: 1182-1186

在线出版日期: 2010-12-01（万方平台首次上网日期，不代表论文的发表时间）