摘要
为研究单边螺栓与T型钢连接的中心支撑钢框架的抗震性能,对1个1∶2缩尺的单跨单层的钢框架进行拟静力加载试验。采用ABAQUS有限元软件,建立子精细化非线性有限元模型,在验证子有限元模型的可靠性与精度基础上,通过改变支撑的孔径尺寸、壁厚以及形状等变量对框架整体抗震性能进行参数化分析。结果表明:有限元模拟结果与试验结果吻合度良好,可用于半刚性连接钢框架在循环荷载下的性能研究。随着支撑孔径和壁厚的增加,框架的滞回曲线更加饱满,刚度、耗能能力和延性皆有明显提升。方形截面支撑的抗震性能对比圆截面更加优异。梁柱节点的半钢性连接方式较刚性连接方式抗震性能更加优异。
To study the seismic performance of a center brace steel frame connected by unilateral bolts and T-shaped steel,quasi-static loading tests were conducted on a 1∶2 scale single span single story steel frame.By using ABAQUS finite element software,a sub refined nonlinear finite element model was established to verify the reliability and accuracy of the sub finite element model.Based on this,the parametric analysis of the overall seismic performance of the frame was carried out by changing variables such as the aperture size,thickness,and shape of the brace.The results show that the finite element simulation results are in good agreement with the test results,and it can be used for the performance study of semi-rigid connected steel frame under cyclic loads.With the increase of brace aperture and thickness,the hysteresis curve of the frame becomes fuller,and the stiffness,energy dissipation capacity,and ductility are significantly improved.The seismic performance of square section brace is superior to that of circular section braces.The semi-rigid connection method of beam column nodes has better seismic performance than the rigid connection method.
作者
王新武
程菁康
刘欢欢
孙海粟
李向
WANG Xinwu;CHENG Jingkang;LIU Huanhuan;SUN Haisu;LI Xiang(School of Civil Engineering and Architecture,Henan University of Science and Technology,Luoyang 471023,China;School of Civil Engineering,Luoyang Institute of Technology,Luoyang 471023,China;School of Civil Engineering and Architecture,Wuhan University of Technology,Wuhan 430070,China;School of Civil Engineering,Henan University of Technology,Jiaozuo 454000,China)
出处
《河南科技大学学报（自然科学版）》
CAS
北大核心
2024年第4期64-72,M0006,M0007,共11页
Journal of Henan University of Science And Technology:Natural Science
基金
国家自然科学基金项目(51678284)
河南省高校科技创新团队项目(21IRTSTHN010)
河南省科技厅科技攻关项目(212102310969)。
关键词
T型钢
中心支撑
钢框架
有限元分析
T-stub
center brace
steel frame
finite element analysis
