耗能梁段长度对偏心支撑钢框架受力性能影响  

Effect of link beam length on mechanical performance of eccentrically braced steel frame

作　　者：孙山川 王新武 李通 时强 孙海粟[2] Sun Shanchuan;Wang Xinwu;Li Tong;Shi Qiang;Sun Haisu(Civil Engineering,Henan University of Science&Technology,Luoyang 471000,China;School of Civil Engineering,Luoyang Institute of Technology,Luoyang 471000,China;School of Science,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]河南科技大学土木工程学院,河南洛阳471000 [2]洛阳理工学院土木工程学院,河南洛阳471000 [3]武汉理工大学理学院,湖北武汉430070

出　　处：《建筑科学》2020年第11期124-131,158,共9页Building 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项目(184200510016)。

摘　　要：为研究耗能梁段长度对K形偏心支撑钢框架性能的影响,利用有限元软件ABAQUS建立模型并进行非线性数值模拟分析。研究表明耗能梁段长度的改变对偏心支撑钢框架受力性能有影响:随着长度的增加偏心支撑钢框架屈服位移逐渐增加,各模型达到屈服位移所需的荷载反而依次减小.模型初始刚度呈下降趋势;长度的不同使得耗能梁段发生弯曲变形的部位不同,长度的增加使得耗能梁段由剪切变形转换为弯曲变形。耗能梁段长度不变,耗能梁段构造形式的不同对偏心支撑钢框架受力性能产生影响,随着加劲肋数量增多,间距相应减小,偏心支撑钢框架极限承载力及延性性能明显提高。In order to study the influence of the length of the link beam on the performance of the K-shaped eccentrically braced steel frame,a finite element software ABAQUS is used to establish a model and perform nonlinear numerical simulation analysis.The research shows that the change of the length of the link beam has an impact on the mechanical performance of the eccentrically braced steel frame:as the length increases,the yield displacement of the eccentrically braced steel frame gradually increases,the loads require to achieve the yield displacement of each model decreases in turn,and the stiffness is decreasing;the difference in length makes the bending deformation of the link beam section different.The increase of the length causes the link beam to change from shear deformation to bending deformation.The length of the link beam remains the same,the different structural forms of the link beam affect the mechanical performance of the eccentrically braced steel frame.As the number of stiffeners increases,the spacing decreases accordingly,and the ultimate bearing capacity and ductility of the eccentrically braced steel frame are significantly improved.

关 键 词：偏心支撑框架 有限元模拟 耗能梁段长度 构造形式 受力性能 

分 类 号：TU391[建筑科学—结构工程]