基于试验子结构恢复力修正的不完整边界条件混合试验方法  

A HYBRID SIMULATION METHOD WITH INCOMPLETE BOUNDARY CONDITIONS BASED ON RESTORING FORCE CORRECTION OF EXPERIMENTAL SUBSTRUCTURE

作　　者：王尚长 杨格 王贞 吴斌 肖嘉俊[1,2] WANG Shang-zhang;YANG Ge;WANG Zhen;WU Bin;XIAO Jia-jun(School of Civil Engineering and Architecture,Wuhan University of Technology,Wuhan,Hubei 430070,China;Sanya Science and Education Innovation Park,Wuhan University of Technology,Sanya,Hainan 572000,China;Key Laboratory of Earthquake Engineering Simulation and Seismic Resilience of China Earthquake Administration,Tianjin University,Tianjin 300072,China)

机构地区：[1]武汉理工大学土木工程与建筑学院,湖北武汉430070 [2]武汉理工大学三亚科教创新园,海南三亚572000 [3]中国地震局地震工程综合模拟与城乡抗震韧性重点实验室(天津大学),天津300072

出　　处：《工程力学》2024年第5期77-86,共10页Engineering Mechanics

基　　金：国家自然科学基金项目(52008320,51878525,52078398);武汉理工大学三亚科教园开放基金项目(2020KF0011);中国地震局地震工程综合模拟与城乡抗震韧性重点实验室项目(2021年度开放课题)。

摘　　要：相比于传统拟静力和拟动力试验,混合试验通常存在较为复杂的试验子结构边界条件。受到实验室加载条件的限制,子结构的边界条件往往难以完全实现,这将对混合试验的保真度产生很大影响,即混合试验中的不完整边界条件问题。为解决不完整边界条件问题,提出一种基于试验子结构恢复力修正的不完整边界条件混合试验方法。该方法为试验子结构建立两套数值模型,并通过两套数值模型修正试验子结构的不完整恢复力。两套数值模型的区别在于边界条件的设定:第一套数值模型具有完整的边界条件;第二套数值模型具有与试验子结构相同的边界条件,为不完整边界条件。该研究分析了边界自由度耦合程度、数值模型误差对该方法精度的影响,验证了该方法对存在模型误差的数值模型具有较好的鲁棒性;最后,采用所提方法对一座两层两跨抗弯框架结构进行了抗震性能数值分析。结果表明:与常规混合试验方法和弱耦合混合试验方法相比,该方法不仅具有解决不完整边界条件问题的能力,而且也表现出较高的仿真精度。Compared with quasi-static and pseudo-dynamic tests,the hybrid simulation usually has more complex boundary conditions(BCs)of experimental substructure(ES).Limited by the laboratory loading conditions,the BCs of the substructure are often difficult to fully realized,which may have a great impact on the fidelity of hybrid simulation,that is,the problem of incomplete BCs in hybrid simulation.To solve the problem of incomplete BCs,a novel testing method is proposed.Two numerical modules of the ES are established in this method and are used to correct the incomplete restoring force of the ES.The difference between the two modules sets the same BCs as the ES,which is incomplete BCs.In this study,the influence of coupling degree of boundary DOFs and numerical module error on the accuracy of this method is analyzed,and it is verified that this method has good robustness to the numerical modules with model error.Finally,the seismic performance of a two-story and two-span moment-resisting frame structure is numerically analyzed using the proposed method.Compared with the conventional hybrid simulation and weakly coupled hybrid simulation method,the results show that this method has the ability to solve the problem of incomplete BCs and has higher simulation accuracy.

关 键 词：混合试验 不完整边界条件 试验子结构恢复力修正 辅助数值模型 数值模拟 

分 类 号：TU317[建筑科学—结构工程]