耗能梁段腹板开孔对偏心支撑钢框架抗震性能影响  

Influence of Web Openings on Seismic Behavior of Eccentrically Braced Steel Frames

作　　者：李通 王新武[2] 时强[2,3] 布欣[2] 孙海粟[2] LI Tong;WANG Xinwu;SHI Qiang;BU Xin;SUN Haisu(School of Civil Engineering,Henan University of Science&Technology,Henan Luoyang471023,China;Henan International Joint Laboratory of New Civil Engineering Structure,Luoyang Institute of Science and Technology,Henan Luoyang471023,China;School of Science,Wuhan University of Science and 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471023 [2]洛阳理工学院河南省新型土木工程结构国际联合实验室,河南洛阳471023 [3]武汉理工大学理学院,武汉430070

出　　处：《河南大学学报（自然科学版）》2021年第3期339-349,共11页Journal of Henan University:Natural Science

基　　金：国家自然科学基金项目(51678284);中原科技创新领军人才项目(214200510002);河南省高校科技创新团队项目(21IRTSTHN010);河南省科技厅科技攻关项目(212102310969);河南省高等学校重点科研项目(21B560010);河南省高校青年骨干教师培养计划(2020GGJS244)。

摘　　要：为研究耗能梁段腹板开孔对K型偏心支撑钢框架抗震性能的影响,进行了一个1∶2缩尺单层单跨试件的拟静力加载实验,并采用ABAQUS软件对其结果进行数值模拟.在验证其结果准确的基础上,分别以开孔率、孔间竖向距离、孔间横向距离为参数建立了3组有限元模型,系统分析了不同开孔参数对模型抗震性能的影响.结果表明:在腹板厚度不变的情况下,任何形式的开孔虽然会使结构的延性上升,但是会导致承载能力和初始刚度的下降;开孔率和孔间横向间距是影响耗能梁段转动能力的重要因素.In order to study the influence of web opening in link on the seismic performance of K-type eccentrically braced steel frames,the quasi-static test of a 1∶2 scale single-span specimen was carried out,and the results were simulated numerically by ABAQUS software.On the basis of verifying the accuracy of the results,three sets of finite element models were established with the parameters of opening ratio,vertical distance between opening,horizontal distance between opening,and the influence of different opening parameters on the seismic performance of the model was systematically analyzed.The results show that,under the condition of unchanged web thickness,the ductility of the structure will increase due to any kind of opening,but the bearing capacity and initial stiffness will decrease.The ratio of opening and the horizontal distance between opening is an important factor affecting the rotating capacity of energy dissipation beam.

关 键 词：偏心支撑 拟静力实验 腹板开孔 抗震性能 

分 类 号：TU391[建筑科学—结构工程]