考虑二阶效应串联隔震体系的塑性变形分析  

Analysis of Plastic Deformation of Serial Isolation System Considering the Second-order Effect

作　　者：杜永峰[1,2] 吴忠铁[1] 杨静成[1] 李慧[1] 

机构地区：[1]兰州理工大学防震减灾研究所,甘肃兰州730050 [2]兰州理工大学西部土木工程防灾减灾教育部工程研究中心,甘肃兰州730050

出　　处：《工程抗震与加固改造》2012年第1期47-52,共6页Earthquake Resistant Engineering and Retrofitting

基　　金：国家自然科学基金(50778087;50978130)

摘　　要：随着基础隔震技术研究的不断深入及其在我国汶川大地震中表现出的良好的减震效果,使得隔震技术在我国地震区灾后重建工程和邻近地区的新建工程中大面积开展应用。然而,实际的工程中,有关隔震结构体系仍有不少特殊的力学问题有待解决,特别是橡胶隔震支座与地下室悬臂柱组成的串联体系的塑性变形和稳定性问题,一直是工程界关注的焦点。针对这一问题,本文对不同轴力作用下串联体系塑性变形能力问题进行了研究。在考虑弯剪二阶效应下对串联隔震体系变形特性进行了理论推导,同时应用有限元分析软件ANSYS对给定的串联隔震体系在8种荷载工况下进行了模拟分析。结果表明,弯剪二阶效应对于串联隔震体系的内力影响是明显的,随着轴力的增加,串联隔震体系塑性变形能力下降。With the development of the based isolation technology and its good performance during the Wenchuan earthquake,it is applied widely in the new building in the earthquake zones.However,there are some special mechanism problems on the serial isolation system in practical engineering are unsolved.Specially plastic deformation and stability of the serial isolation system,which is component of isolated rubber bearing and reinforced concrete column,are always focused by the engineer field.For this problem,the plastic deformation of the serial isolation system under the different axial force is studied.And deformation formulation of serial isolation system is derived considering the second effective of the bending and shear,meantime the given serial isolation system are analyzed by ANASYS finite element software under the 8 axial force cases.The results indicate that the second-order effect of the bending and shear is obvious for internal force of the serial isolation system and the plastic deformation reduces with the increasing of the axial force.

关 键 词：基础隔震 串联隔震体系 二阶效应 塑性变形 

分 类 号：TU352.12[建筑科学—结构工程]