摘要
层间隔震是当前抗震防护技术中的热点问题之一。本文首先给出钢筋混凝土弹性矩阵的等效计算方法以及普通叠层橡胶支座(RB)、铅芯橡胶支座(LRB)等效弹簧单元刚度矩阵的计算方法;接着采用ABUQUS软件建立框架数值模型并设置相应的边界条件;最后以一幢8层钢筋混凝土框架结构建筑为例,通过数值计算,比较分析了以RB橡胶支座和LRB橡胶支座作为隔震装置的两种层间隔震方案的优劣。计算结果表明:与传统结构相比,两种层间隔震方案都能大大降低上部结构的加速度、位移响应;上部结构运动近似于刚体运动,抗震效果明显。总体上看,LRB隔震方案优于RB隔震方案。本文方法对钢筋混凝土层间隔震技术的数值模拟研究有一定的意义。
Interlayer isolation is one of hotspet problems in current seismic protection field. In this paper, the equivalent computation methods for elastic matrix of reinforcement concrete and equivalent spring stiffness matrix of common laminate rubber bearing （RB） and lead rubber bearing are presented at first. Then the software, ABUQUS based on finite element method is used to investigate the anti seismic efficiency of one 8-layer interlayer isolation reinforced concrete frame structure in which RB and LRB bearings are considered respectively. The results show that Compared with traditional methods, the two isolation schemes using RB and LRB respectively can achieve significant effective which is displayed by lower acceleration and displacement. All in all, LRB perform better than RB. The realization of the numerical simulation in this paper can promote the numerical simulation study on interlayer isolation of reinforced concrete frame structure.
出处
《四川建筑科学研究》
2013年第3期173-177,共5页
Sichuan Building Science
关键词
框架结构
层间隔震
地震波
有限元分析
frame structure
interlayer isolation
seismic wave
finite element analysis
