中心支撑半刚性连接钢框架抗震性能
Seismic Performance of Semi-rigid Connection Steel Frame with Central Brace
王新武 1程菁康 2刘欢欢 3孙海粟 4李向5
作者信息
- 1. 河南科技大学土木建筑学院,河南洛阳 471023;洛阳理工学院土木工程学院,河南洛阳 471023
- 2. 河南科技大学土木建筑学院,河南洛阳 471023
- 3. 武汉理工大学土木工程与建筑学院,湖北武汉 430070
- 4. 洛阳理工学院土木工程学院,河南洛阳 471023
- 5. 河南理工大学土木工程学院,河南焦作 454000
- 折叠
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.
Abstract
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.
关键词
T型钢/中心支撑/钢框架/有限元分析Key words
T-stub/center brace/steel frame/finite element analysis引用本文复制引用
基金项目
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)
出版年
2024
国家科技期刊平台
NSTL
万方数据