Experimental and numerical study of buckling-restrained braces configured with out-of-plane eccentricity under cyclic loading
作者机构：Earthquake Engineering Research&Test Center Guangzhou University Guangdong Provincial Key Laboratory of Earthquake Engineering and Applied Technology Key Laboratory of Earthquake Resistance Earthquake Mitigation and Structural Safety Ministry of Education School of Civil Engineering Guangzhou University Graduate School of Urban Environmental Sciences Tokyo Metropolitan University Department of Civil and Natural Resources Engineering University of Canterbury
出 版 物：《Earthquake Engineering and Engineering Vibration》 (地震工程与工程振动(英文刊))
年 卷 期：2024年第04期
页 面：957-971页
核心收录：
学科分类：081405[工学-防灾减灾工程及防护工程] 08[工学] 081402[工学-结构工程] 081304[工学-建筑技术科学] 0813[工学-建筑学] 0814[工学-土木工程]
基 金：National Natural Science Foundation of China under Grant No. 51978184
摘 要：This study focuses on variations in the hysteretic behavior of buckling-restrained braces(BRBs) configured with or without out-of-plane eccentricity under cyclic loading. Quasi-static experiments and numerical simulations were carried out on concentrically and eccentrically loaded BRB specimens to investigate the mechanical properties, energy dissipation performance, stress distribution, and high-order deformation pattern. The experimental and numerical results showed that compared to the concentrically loaded BRBs, the stiffness, yield force, cumulated plastic ductility(CPD) coefficient, equivalent viscous damping coefficient and energy dissipation decreased, and the yield displacement and compression strength adjustment factor increased for the eccentrically loaded BRBs. With the existence of the out-of-plane eccentricity, the initial yield position changes from the yield segment to the junction between the yield segment and transition segment under a tensile load, while the initial high-order buckling pattern changes from a first-order C-shape to a second-order S-shape under a compressive load.
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