建筑钢结构进展2025，Vol.27Issue(7)：10-20,11.DOI:10.13969/j.jzgjgjz.20240618001
金属消能器-屈曲约束支撑复合减震构件抗震性能研究
Study on Seismic Performance of Buckling-Restrained Brace Combined with Steel Yielding Damper
摘要
Abstract
In order to improve the energy dissipation capacity of buckling-retained brace(BRB)under small deformation,a new type of two-stage yielding buckling-restrained brace is proposed.In this system,shear-plate steel yielding dampers are connected in parallel to the BRB out of the tube of BRB,which can be called SD-BRB.In the small deformation stage,the shear-plate steel yielding damper yields to dissipate energy.As the deformation increases,the BRB enters the yield stage,thereby achieving the goal of two-stage yielding.Through comparative tests between BRB and SD-BRB,it was found that the energy dissipation capacity of SD-BRB increased by 2.4 times during the small deformation stage.Based on the experimental results,finite element analysis models were established to study the effect of the ratio of yield bearing capacity between steel yielding damper and BRB,as well as the axial stiffness of steel tube,on the energy dissipation capacity of SD-BRB.The results indicate that when the yield bearing capacity ratio is between 0.05 and 0.10,and the axial stiffness of steel tube is 2.5 to 3.0 times that of the elastic stiffness of the steel yielding damper,the SD-BRB exhibits superior energy dissipation capacity during the small deformation stage.Based on the structural characteristics and results of experiments and finite element analysis,a mechanical model and practical design method for SD-BRB are proposed.关键词
金属消能器/屈曲约束支撑/复合减震构件/消能能力/抗震性能/实用设计方法Key words
steel yielding damper/buckling-restrained brace/composite damper/energy dissipation capacity/seismic performance/practical design method分类
建筑与水利引用本文复制引用
施海熔,胡大柱,孙航..金属消能器-屈曲约束支撑复合减震构件抗震性能研究[J].建筑钢结构进展,2025,27(7):10-20,11.基金项目
国家自然科学基金(51408361) （51408361）
