不同长度耗能梁段偏心支撑框架受力性能  

Mechanical Behavior of Eccentric Support Frames with Different Length Energy Dissipation Beams

作　　者：孙山川 王新武[2] 孙海粟[2] 时强 SUN Shanchuan;WANG Xinwu;SUN Haisu;SHI Qiang(Civil Engineering School,Henan University of Science&Technology,Luoyang 471023,China;School of Civil Engineering,Luoyang Institute of Technology,Luoyang 471023,China)

机构地区：[1]河南科技大学土木工程学院,河南洛阳471023 [2]洛阳理工学院土木工程学院,河南洛阳471023

出　　处：《河南科技大学学报（自然科学版）》2020年第1期56-61,67,M0006,共8页Journal of Henan University of Science And Technology:Natural Science

基　　金：国家自然科学基金项目(51678284);河南省科技创新杰出人才基金项目(184200510016)

摘　　要：通过对3种长度耗能梁段下的K型偏心支撑钢框架进行往复力加载试验,研究了耗能梁段长度对结构受力性能的影响,分析了结构的极限承载能力、破坏形式、刚度退化及耗能等性能。研究结果表明:随着耗能梁段长度的增加,K型偏心支撑钢框架的强度、刚度和耗能均产生了明显的退化现象,但延性有所提升。耗能梁段长度的增加使得偏心支撑钢框架屈服荷载及极限承载力明显下降,这表明耗能梁段的长度对钢框架受力性能具有较大影响。耗能梁段长度的改变,并不影响偏心支撑钢框架率先通过耗能梁段消耗能量,从而保护整体框架相对稳定的设计理念。Through the reciprocating force loading test of the K-type eccentrically braced steel frame under three lengths of energy-consuming beam sections,the effects of the length of the energy-consuming beam section on the mechanical behavior of the structure was studied. The ultimate bearing capacity,failure mode,stiffness degradation and energy dissipation capability were analyzed.The results show that the strength,stiffness and energy dissipation performance of the K-type eccentrically braced steel frame are obviously degraded with the increase of the length of the energy-consuming beam section,but the ductility performance is improved.The increase of the length of the energy-consuming beam section makes the yield load and ultimate bearing capacity of the eccentrically supported steel frame decrease significantly,indicating that the length of the energyconsuming beam section has a great influence on the mechanical performance of the steel frame. The length changing of the energy-consuming beam segment does not affect the design concept that the eccentricallysupported steel frame is the first to consume energy through the energy-consuming beam segment to protect the overall frame.

关 键 词：K型偏心支撑钢框架 耗能梁段长度 承载力 耗能能力 

分 类 号：TU392[建筑科学—结构工程]