基于IDA方法的带可替换耗能梁段偏心支撑钢框架结构影响系数研究  

Study on structural influencing coefficient of eccentrically braced steel frame with replaceable energy dissipation links based on IDA method

作　　者：殷占忠[1,2] 李鑫炜 冯大哲 YIN Zhan-zhong;LI Xin-wei;FENG Da-zhe(School of Civil Engineering,Lanzhou Univ.of Tech.,Lanzhou 730050,China;Western Engineering Research Center of Disaster Mitigation in Civil Engineering of Ministry of Education,Lanzhou Univ.of Tech.,Lanzhou 730050,China)

机构地区：[1]兰州理工大学土木工程学院,甘肃兰州730050 [2]兰州理工大学西部土木工程防灾减灾教育部工程研究中心,甘肃兰州730050

出　　处：《兰州理工大学学报》2024年第5期133-138,共6页Journal of Lanzhou University of Technology

基　　金：国家自然科学基金(51968044)。

摘　　要：为研究带可替换双槽钢型剪切耗能梁段偏心支撑钢框架中耗能梁段的截面尺寸、梁段长度、加劲肋个数以及结构层数对于结构影响系数R和位移放大系数C_(d)的影响,通过OpenSees有限元软件对18个不同参数的模型进行增量动力时程分析(IDA),得到各模型的结构影响系数和位移放大系数.结果表明:通过合理设计耗能梁段的构造参数,能够提高带可替换双槽钢型剪切耗能梁段防屈曲偏心支撑钢框架的抗震能力以及变形能力,给出R和C_(d)的建议值,为偏心支撑钢框架结构影响系数的研究提供参考.To investigate the effects of cross-section size,beam length,number of stiffeners,and number of floors on the structural influence coefficient(R)and the displacement amplification factor(C_(d))of eccentrically braced frames with replaceable double-channel shear links,incremental dynamic analysis(IDA)was conducted on 18 models with varying parameters using the OpenSees finite element software.The structural influence coefficients and displacement amplification factors were calculated for each respective model.The results indicate that the seismic performance and deformation capacity of the eccentrically braced frame with replaceable double-channel shear links can be enhanced through the judicious design of the shear link structural parameters.Additionally,proposed values of R and C_(d)are provided to serve as a reference for further studies on the structural influence coefficient of eccentrically braced frames.

关 键 词：可替换双槽钢型剪切耗能梁段 增量动力分析 结构影响系数 

分 类 号：TU391[建筑科学—结构工程]