摘要
本文提出基于GPU并行计算、缩减自由度及考虑隔震支座非线性耦合力学特性的隔震结构混合试验模拟方法,准确地评估地震作用下隔震层橡胶隔震支座与上部结构耦合的真实响应特点。通过数值模拟的方法对上部结构各楼层的恢复力性能进行分析,将上部结构简化为非线性MDOF剪切模型;结合隔震支座的拟静力试验建立考虑非线性耦合的隔震支座模型,得到该结构的缩减自由度子结构耦合混合试验数值模型,通过橡胶隔震支座的动力试验和子结构交互计算进行不同地震作用下RC隔震框架的混合模拟试验研究。试验结果表明:10层RC隔震结构的混合试验中,隔震层变形与数值模拟计算结果吻合较好,利用混合试验方法对结构自由度进行缩减,既能较好地还原上部结构的动力特性,也能得到橡胶隔震支座在地震作用下的真实响应,且保证了较好的分析速度和精度。
In this paper,a hybrid experimental simulation method of isolation structure based on GPU parallel computing,reduced degree of freedom and considering nonlinear coupling mechanical properties of isolation bearings is proposed to accurately evaluate the real response characteristics of coupling between rubber isolation bearings and superstructure under seismic action.The restor-ing force performance of each floor of the superstructure is analyzed by numerical simulation,and the superstructure is simplified in-to a nonlinear MDOF shear model.Combined with the pseudo-static test of the isolation bearing,the isolation bearing model con-sidering nonlinear coupling is established,and the reduced degree of freedom(DOF)substructure coupling mixed experimental nu-merical model of the structure is obtained.Through the dynamic test of the isolation bearing and the numerical interaction calcula-tion of the substructure,the mixed simulation test of the RC isolation frame under different earthquake actions is carried out.The test results show that in the mixed test of 10-story RC isolation structure,the deformation of isolation layer is in good agreement with the numerical simulation results.The calculation results are in good agreement with numerical simulation,and the hybrid test method is used to analyze the structure of degree of freedom to shrink,which can better restore the upper structure dynamic charac-teristics and get the rubber isolation bearing the real response under seismic action,and to ensure the good analytical speed and pre-cision.
作者
陈睦锋
刘文光
褚濛
李韶平
潘鹏
CHEN Mu-feng;LIU Wen-guang;CHU Meng;LI Shao-ping;PAN Peng(Department of Civil Engineering,Shanghai University,Shanghai 200444,China;Shanghai Nuclear Engineering Research&Design Institute,Co.,Ltd.,Shanghai 200233,China;Department of Civil Engineering,Tsinghua University,Beijing 100084,China)
出处
《振动工程学报》
EI
CSCD
北大核心
2023年第5期1402-1410,共9页
Journal of Vibration Engineering
基金
国家自然科学基金资助项目(51778355,51778356)。
关键词
隔震结构
混合试验分析
静力分析
自由度缩减
isolated structure
mixed test analysis
statical analysis
reduction of freedom
