建筑钢结构进展2026，Vol.28Issue(6)：20-29,10.DOI:10.13969/j.jzgjgjz.20241112002
分段控制型钢支撑抗震性能试验研究
Experimental Study on the Seismic Performance of Segmentally Controlled Steel Braces
摘要
Abstract
To address the issues of compressive buckling in traditional steel braces and the structural complexity and performance instability of buckling-restrained braces,a segmentally controlled section steel brace was proposed.This innovative brace consists of energy dissipation sections at both ends and an elastic section in the middle based on the design concept of zonal control.Under rare earthquakes,plastic deformation occurs in the energy dissipation sections to dissipate seismic energy,and the elastic section always remains in an elastic state.Three segmentally controlled section steel brace specimens with different energy dissipation section configurations(unconstrained and constrained)and steel types(Q235 and LYP225 steel)for the energy dissipation section were designed.The failure modes,studied through quasi-static tests.The influence of different configurations and steel types on the seismic performance of this new type of brace was analyzed.The research results show that the specimen made of Q235 steel has the highest bearing capacity but the most significant stiffness degradation.The brace specimens with external constraints(U-shaped plates and channel steel)exhibit full hysteretic curves and greatly improved compressive bearing capacity.There is no obvious stiffness degradation under large displacements;demonstrating stable tensile and compressive performance and excellent energy dissipation capacity.The steel type used in the energy dissipation section has little influence on the energy dissipation and deformation capacity of the segmentally controlled section steel brace.关键词
分段控制/钢支撑/耗能段/弹性段/拟静力试验/抗震性能/破坏模式Key words
segmental control/steel brace/energy dissipation section/elastic section/quasi-static test/seismic performance/failure mode分类
建筑与水利引用本文复制引用
辛力,张龙,李佳珂,连鸣,程倩倩..分段控制型钢支撑抗震性能试验研究[J].建筑钢结构进展,2026,28(6):20-29,10.基金项目
陕西省科协青年人才托举计划(20230426),中建股份科技研发课题(CSCEC-2023-Z-18,CSCEC-2025-Z-22),陕西省秦创原"科学家+工程师"队伍建设(2022KXJ-084) （20230426）
