摘要
我国《建筑抗震设计规范》(GB 50011-2010)推荐采用考虑附加阻尼比和附加刚度的振型分解反应谱法进行建筑减震结构地震作用效应分析。但附加阻尼比和附加刚度的确定存在近似性,亟待发展高效准确的减震结构分析方法。以减震结构为研究对象,建立了减震结构地震响应的时域显式表达式,实现了非线性减震装置恢复力(阻尼力)的快速迭代计算。结合蒙特卡罗模拟,通过地震响应平均峰值的计算获得了统计上准确的结构层间剪力,并将其与规范反应谱法得到的层间剪力进行对比,进而获得了各楼层的层间剪力校准系数,采用该校准系数对规范反应谱法计算得到的各楼层构件内力进行了调整。最后,针对三个建筑减震结构,分别采用层间剪力校准系数法和规范反应谱法进行地震响应分析,验证了层间剪力校准系数法在减震结构地震作用效应计算方面的高效性和准确性。
The mode-superposition response spectrum method with considering additional damping ratio and additional stiffness was recommended by the Chinese Code for seismic design of buildings(GB 50011-2010)to carry out the seismic response analysis of energy-dissipation building structures.However,there exists approximation in the determination of additional damping ratio and additional stiffness,and it is urgent to develop an efficient and accurate analysis method for energy-dissipation structures.The energy-dissipation structures were taken as the research object,and the explicit expressions of seismic responses of energy-dissipation structures were established,which realizes the fast iterative calculation of restoring force(damping force)of nonlinear damping device.Combined with the Monte Carlo simulation,through calculating the average peak value of seismic response,the statistically accurate interstorey shear forces of the structure were obtained and compared with the results of code response spectrum method,and the interstorey shear force calibration coefficients were obtained.The internal forces of each floor member calculated by the code response spectrum method were adjusted by using the interstorey shear force calibration coefficients.Finally,for the three energy-dissipation structures,seismic response analyses were conducted by using the interstorey shear force calibration method and the code response spectrum method respectively,and the efficiency and accuracy of the interstorey shear force calibration method for seismic mitigation analysis of building structures were verified.
作者
郭侯佐
苏成
冼剑华
黄志坚
GUO Houzuo;SU Cheng;XIAN Jianhua;HUANG Zhijian(School of Civil Engineering and Transportation,South China University of Technology,Guangzhou 510640,China;State Key Laboratory of Subtropical Building Science,South China University of Technology,Guangzhou 510640,China)
出处
《建筑结构》
北大核心
2023年第6期106-113,共8页
Building Structure
基金
国家自然科学基金项目(51678252)
广东省现代土木工程技术重点实验室项目(2021B1212040003)。
关键词
减震结构
减震分析
非线性
时域显式随机模拟法
层间剪力校准系数法
energy-dissipation structure
seismic mitigation analysis
nonlinear
explicit time-domain method
interstorey shear force calibration method
