基于实时混合试验的隔震结构楼面设计反应谱评估  

EVALUATION OF FLOOR DESIGN RESPONSE SPECTRUM OF ISOLATED STRUCTURE BASED ON REAL-TIME HYBRID TEST

作　　者：党育[1] 李国宝 李兆席 陈一杰 DANG Yu;LI Guo-bao;LI Zhao-xi;CHEN Yi-jie(School of Civil Engineering,Lanzhou University of Technology,Lanzhou 730050,China)

机构地区：[1]兰州理工大学土木工程学院,兰州730050

出　　处：《工程力学》2025年第4期206-215,共10页Engineering Mechanics

基　　金：国家自然科学基金项目(62166025,51668043);甘肃省重点研发计划项目(21YF5GA073)。

摘　　要：为评估提出的基础隔震结构楼面设计反应谱,构建隔震结构-设备组合体系的实时混合试验系统,将单个隔震支座作为试验子结构,并将体系剩余部分作为数值子结构,考虑影响隔震结构楼面反应谱的各主要因素,对6个不同的隔震结构-设备组合体系进行实时混合试验,比较试验所得的楼面均值谱和楼面设计反应谱,评估楼面设计反应谱的准确性和可靠性。试验结果表明:建立的隔震结构-设备组合体系的实时混合试验系统可考虑隔震结构与设备的相互作用,实现较多工况的隔震结构-设备组合体系的地震响应测试,且指令位移和测量位移的峰值误差在0.2%以内,支座的恢复力峰值的误差不超过5%,说明构建的实时混合试验试验误差较小,试验结果可信;提出的隔震结构楼面设计反应谱的谱型与试验所得的楼面均值谱基本一致,主要特征参数取值与试验所得的楼面均值谱相同,除谱峰值外,提出的楼面设计反应谱的谱值均大于楼面均值谱,各周期点的平均误差小于5%,说明提出的隔震结构楼面设计反应谱谱值估计偏于保守,且较为准确。In order to evaluate the floor design response spectrum of the proposed base-isolated structure,a realtime hybrid test system for the isolated structure-equipment combination system was established.A single isolation bearing was used as the test substructure,and the rest of the system was used as the numerical substructure.Considering the main factors affecting the floor response spectrum of the isolated structure,real-time hybrid tests were carried out on six different isolated structure-equipment combination systems.The accuracy and reliability of the floor design response spectrum were evaluated by comparing the floor design response spectrum with the test floor mean spectrum.The test results show that the established real-time hybrid test system of isolation structure-equipment combination system can consider the interaction between isolation structure and equipment,and realize the seismic response test of the seismic isolation structure-equipment combination system under more cases.Moreover,the peak error of the command displacement and measured displacement is under 0.2%,and the peak error of restoring force of the bearing is less than 5%,indicating that the error of the real-time hybrid test is small and the test results are credible.The spectral type of the floor design response spectrum of the isolated structure is basically consistent with the floor mean spectrum obtained from the test,and the values of the main characteristic parameters are the same as those of the floor mean spectrum obtained by the test.Except for the spectral peak,the spectral value of the proposed floor design response spectrum is greater than that of the floor mean spectrum,and the average error of each periodic point is less than 5%,indicating that the proposed floor design response spectrum value of the isolated structure is conservative and accurate.

关 键 词：基础隔震 设备 楼面设计反应谱 实时混合试验 楼面均值谱 

分 类 号：TU352.12[建筑科学—结构工程]