基于钢筋混凝土足尺柱拟静力试验的离线模型更新混合试验方法  

Offline model updating hybrid test based on Quasistatic test of fullscale reinforced concrete column

作　　者：郭玉荣[1,2] 叶哲谦 GUO Yurong;YE Zheqian(College of Civil Engineering,Hunan University,Changsha 410082,China;Key Laboratory of Building Safety and Energy Efficiency,Ministry of Education,Changsha 410082,China)

机构地区：[1]湖南大学土木工程学院,湖南长沙410082 [2]建筑安全与节能教育部重点实验室,湖南长沙410082

出　　处：《世界地震工程》2022年第3期70-77,共8页World Earthquake Engineering

基　　金：国家自然科学基金资助项目(51878259,51161120360)。

摘　　要：离线模型更新混合试验对构件拟静力数据进行恢复力模型参数识别,并更新数值子结构中相应构件的模型参数来提高混合试验精度,但该方法尚缺少真实试验的验证。本文基于课题组开展的足尺RC柱拟静力试验,取恢复力模型为集中塑性铰Ibarra-Medina-Krawinkler(IMK)模型,进行框架结构离线模型更新混合试验研究。结果表明,当物理子结构取为RC足尺柱时,离线模型更新混合试验能获得接近于真实试验情况下结构的地震响应,从而对该方法的有效性进行了试验验证。利用IMK经验公式,将真实试验模型参数识别值按轴压比进行对照修正,应用于不同层数的框架结构地震响应模拟,实现了试验数据的重复利用。The offline model updating hybrid test identifies the restoring force model parameters of the Quasi-static data of the component,and updates the model parameters of the corresponding component in the numerical substructure to improve the accuracy of the hybrid test.However,this method still lacks the verification of real tests.Based on the Quasi-static test of the full-scale RC column carried out by the research group,this paper takes the restoring force model as the centralized plastic hinge Ibarra-Medina-Krawinkler(IMK)model,and conducts the offline model updating hybrid test research for frame model.The results show that when the physical substructure is a RC full-scale column,the offline model updatinghybrid test can obtain a seismic response close to the real test situation,thereby verifying the effectiveness of the method.Using the IMK empirical formula,the real test model parameter identification value is compared and corrected according to the axial compression ratio,and they were applied to the seismic response simulation of frame structures with different stories,realizing the repeated use of test data.

关 键 词：离线模型更新 混合试验 足尺RC柱 IMK模型 拟静力试验 

分 类 号：TU317[建筑科学—结构工程]