文献类型：期刊文献

英文题名：Experimental validation and numerical simulation of a dual-self-centering variable friction braced frame under strong ground motions

作者：Wang, Yongwei Zhou, Zhen Ge, Hanbin Yao, Jiehua Xie, Qin

第一作者：Wang, Yongwei

通信作者：Zhou, Z[1]

机构：[1]Southeast Univ, Key Lab Concrete & Prestressed Concrete Struct, Minist Educ, Nanjing 210096, Peoples R China;[2]Meijo Univ, Dept Civil Engn, Nagoya 4688502, Japan;[3]Guizhou Inst Technol, Sch Civil Engn, Guiyang 550003, Peoples R China

第一机构：Southeast Univ, Key Lab Concrete & Prestressed Concrete Struct, Minist Educ, Nanjing 210096, Peoples R China

通信机构：corresponding author), Southeast Univ, Key Lab Concrete & Prestressed Concrete Struct, Minist Educ, Nanjing 210096, Peoples R China.

年份：2022

卷号：56

外文期刊名：JOURNAL OF BUILDING ENGINEERING

收录：;EI(收录号：20222612270125);Scopus(收录号：2-s2.0-85132517659);WOS:【SCI-EXPANDED(收录号:WOS:000817844400001)】；

基金：The authors would like to acknowledge financial supports from "National Natural Science Foundation of China (Grant No. 51878150, 52108449) ", and "the Scientific Research Foundation of Graduate School of Southeast University (Grant NO. YBPY2126) ". Meanwhile, the authors also acknowledge the Pacific Earthquake Engineering Research (PEER) online ground motion database for earthquake records. These supports are gratefully acknowledged.

语种：英文

外文关键词：Shake table test; Steel braced frame; Self-centering; Variable friction; Near-field-pulse earthquakes

摘要：The dual self-centering variable friction brace (DSC-VFB) is a novel resilient system with a loading stiffness higher than the unloading stiffness and an enhanced energy dissipation capability. This study presents experimental and numerical analyses of a 1/3-scaled dual-self-centering variable friction braced frame (DVBF). The pinned beam-column, column-base connections in the DVBF ensured that the DSC-VFBs were a standalone lateral seismic resisting system. Three ground motions scaled to six shaking intensities were conducted to evaluate the seismic responses of the DVBF. The ground motions were subjected to far-and near-field earthquakes. Owing to the high seismic resistance of the DVBF, the stiffness degradation could be omitted after several strong earthquakes. The frame returned to its initial position with nearly zero residual drift, although the maximum drift exceeded 2.5%. The grooved friction plates and self-centering system, which could be disassembled and replaced conveniently, had no observable damage after the tests. A 3D simulation model was developed based on practical constructions. The nonlinear analysis results were compared with the experimental results. The two exhibited good agreement. The results showed that the DVBF under near-field pulse earthquakes resulted in larger displacement and acceleration responses than those under far-field and near-field no-pulse earthquakes. The present study verified the effective working mechanism and good resilience of the DSC-VFB and DVBF even under strong seismic shaking intensities.