建筑钢结构进展2025，Vol.27Issue(9)：15-26,12.DOI:10.13969/j.jzgjgjz.20240409001
双层方钢管防屈曲支撑滞回性能试验研究
Experimental Study on Hysteretic Behavior of Dual-Tube Buckling-Restrained Braces
摘要
Abstract
The unreasonable design of ends of buckling-restrained braces will cause premature fracture of weak components easily.To avoid this phenomenon,a novel dual-tube buckling-restrained brace was proposed in this paper.Dual tubes restrain the plates in the gap,and the front or back side of the upper and lower plates are welded to the outer surface of the inner tube or the inner surface of the outer tube,making this type of brace has the same performance under compression and tension.Four dual-tube buckling-restrained braces were manufactured in order to carry on a low-cycle reversed loading test,studying the influences of plate arrangement and the number of energy dissipation parts on hysteretic behavior of the braces.The failure mechanism,hysteretic behavior,ductility,stiffness degradation and energy dissipation of the four braces under cyclic loading were researched.Meanwhile,numerical analysis on the seismic behavior of the brace was performed.The experimental results indicated that the hysteretic curves of the braces were full,and the energy dissipation capacity and deformation capacity were excellent.Under axial loading,the specimen primarily dissipated energy through the plastic deformation of the energy dissipation plates.In the later loading stage,fracture of the energy dissipation plates occurred,leading to a loss of bearing capacity.During the loading,the tubes remained elastic,but the local buckling occurred on the surfaces of the outer tubes.The bearing capacity and stiffness of the brace increased with the increase of the number of energy dissipation parts.A finite element model(FEM)of the brace was developed through ABAQUS.The FEM results agreed well with the test results.关键词
防屈曲耗能支撑/双层方钢管/低周往复荷载试验/滞回性能/耗能能力/有限元分析Key words
buckling-restrained brace/dual-tube/low-cycle reversed loading test/hysteretic behavior/energy dissipation capacity/finite element analysis分类
建筑与水利引用本文复制引用
任炜晨,赵宝成,徐伟栋..双层方钢管防屈曲支撑滞回性能试验研究[J].建筑钢结构进展,2025,27(9):15-26,12.基金项目
国家自然科学基金(51878432),江苏省研究生实践创新计划(SJCX23_1738) （51878432）
