东南大学学报（自然科学版）2025，Vol.55Issue(5)：1246-1254,9.DOI:10.3969/j.issn.1001-0505.2025.05.004
多点约束式微型BRB抗震性能试验与数值模拟研究
Research on seismic performance test and numerical simulation of multipoint-restraining miniature BRB
摘要
Abstract
Miniature buckling-restrained brace(MBRB)can serve as energy dissipation device for precast joints and scaled structural models in shaking table tests.This study proposes a novel multipoint-restraining MBRB(MRMBRB)featuring good buckling-restraining performance,simple structure,easy fabrication,and controllable cost.Four specimens were designed,manufactured,and tested under cyclic loading to evaluate their mechanical properties.A refined numerical simulation method for MRMBRB was proposed and vali-dated,and applied to conduct parametric analysis.The results indicate that MRMBRB can effectively limit cores buckling,achieving the lateral deformation of only 1 mm.The pitch and wire diameter of the springs are key design parameters affecting the buckling restraint effect.The proposed numerical simulation method dem-onstrates good agreement with the experimental results,validating the accuracy of the numerical model in simulating the hysteretic characteristics,bearing capacity and deformation mode of MRMBRB.The spring pitch exhibits an inverse relationship with the effectiveness of multipoint-restraining springs in controlling the buckling behavior of the cores.关键词
微型屈曲约束支撑/多点约束弹簧/滞回曲线/数值模拟/抗震性能Key words
miniature buckling restrained brace(BRB)/multipoint-restraining springs/hysteresis curve/nu-merical simulation/seismic performance分类
建筑与水利引用本文复制引用
李爱群,何洋,杨参天..多点约束式微型BRB抗震性能试验与数值模拟研究[J].东南大学学报（自然科学版）,2025,55(5):1246-1254,9.基金项目
国家自然科学基金资助项目(52408312) （52408312）
北京市自然科学基金资助项目(8244048) （8244048）
北京建筑大学研究生创新资助项目(PG2024032). （PG2024032）
