高阻尼橡胶隔震结构实时混合试验仿真研究  

Real-time Hybrid Simulation of the Seismically Isolated Structure with High Damping Rubber Bearings

作　　者：李晓磊 谭平[1,2] 姚洪灿 杨奎 郑晓君 周福霖[1,2] LI Xiao-lei;TAN Ping;YAO Hong-can;YANG Kui;ZHENG Xiao-jun;ZHOU Fu-lin(Key Laboratory of Earthquake Resistance,Earthquake Mitigation and Structural Safety,Ministry of Education,Guangzhou University,Guangzhou 510405;Guangdong Provincial Key Laboratory of Earthquake Engineering and Advanced Technology,Guangzhou University,Guangzhou 510405)

机构地区：[1]广州大学工程抗震减震与结构安全教育部重点实验室,广州510405 [2]广州大学广东省地震工程与应用技术重点实验室,广州510405

出　　处：《广州建筑》2021年第2期1-8,共8页GUANGZHOU ARCHITECTURE

基　　金：国家重点研发计划(2017YFC0703600);国家自然科学基金(51978185);教育部创新团队研究发展计划(IRT13057)。

摘　　要：现行隔震支座试验方法多为慢速加载的拟静力试验,无法准确评估高阻尼橡胶隔震结构在真实地震作用下隔震支座速度相关性特性。本文以某七层框架基底隔震结构为研究对象,考虑物理加载系统的随机性和隔震支座的复杂非线性,建立了自适应时滞补偿实时混合试验仿真系统,对高阻尼橡胶隔震支座的力学性能和隔震结构的动力响应进行了评估。结果表明:在噪声、不确定性及物理加载系统的动力特性等影响下,通过合理地设置时滞补偿器及控制器,支座指令位移与实测位移间的最大误差与顶层加速度最大误差分别为1.71%与4.03%,实时混合试验仿真系统能够较好地反映隔震支座力学特性及上部结构动力响应,计算结果具有良好的精度与鲁棒性,为采用实时混合试验研究真实地震作用下高阻尼橡胶支座速度相关性特性展开了有益的探索。The quasi-static test is a conventional experimental method to evaluate the seismic isolation bearings behaviors,while it cannot capture the load rate-dependent properties of high damping rubber bearings(HDRBs)under realistic seismic loading.To accurately evaluate bearing properties and structural dynamic responses,this paper considers the randomness of the servo-hydraulic actuator and the nonlinearity of the bearings,and establishes the numerical simulation analysis for the real-time hybrid simulation(RTHS)of a seven-story base-isolated frame structure with an adaptive time-delay compensator.The research results show that the maximum errors for tracking performances of the HDRB displacements and the roof acceleration are 1.71%and 4.03%,respectively.The numerical simulation analysis for the RTHS of the isolated system can reflect the mechanical properties of the seismic isolators and the dynamic response of the structure by designing and implementing time-delay compensator and tracking controller,which demonstrates the accuracy and robustness to noise,uncertainties,and dynamic performances of the transfer system.The accurate numerical simulation analysis provides a further understanding for the use of RTHS to evaluate the mechanical properties of HDRBs under realistic earthquake excitations.

关 键 词：隔震结构 高阻尼橡胶支座 支座力学特性 实时混合试验 时滞补偿 

分 类 号：TU317[建筑科学—结构工程]