自复位支撑钢框架摩擦装配式节点性能研究  

Performance study of frictional prefabricated connection nodes in self-centering braced steel frame

作　　者：徐龙河[1] 黄楚城 谢行思 XU Long-he;HUANG Chu-cheng;XIE Xing-si(School of Civil Engineering,Beijing Jiaotong University,Beijing 100044,China)

机构地区：[1]北京交通大学土木建筑工程学院,北京100044

出　　处：《振动工程学报》2024年第7期1239-1249,共11页Journal of Vibration Engineering

基　　金：北京建筑大学大型多功能振动台阵实验室开放研究专项基金项目(2021MFSTL08);国家自然科学基金面上项目(52078036);中国博士后科学基金面上项目(2022M710340)。

摘　　要：自复位支撑在激活后具有较大的刚度和承载力,支撑连接节点及梁柱受力复杂,损伤风险高。提出了一种基于摩擦连接的自复位支撑钢框架装配式节点,利用摩擦滑移连接实现自复位支撑极限轴力可控,并为整体结构提供附加耗能。阐述了该摩擦装配式节点的构造、组装和工作原理,通过数值模拟对其抗震性能进行研究,并分析了该节点设计参数对其性能的影响。结果表明:采用该节点的自复位支撑钢框架滞回响应更为饱满,整体结构耗能能力提升了20.81%,节点对总水平剪力的实际限制作用达17.56%,有效减缓了节点区塑性发展。通过改变支撑连接节点的摩擦片摩擦系数和高强螺栓预紧力,能够实现起滑位移与起滑力可调。Self-centering brace has greater stiffness and bearing capacity after being activated.The brace connection,beam and col⁃umn are subjected to more complex forces and higher risk of damage.A novel frictional prefabricated connection node in self-center⁃ing braced steel frame is proposed to control ultimate axial force of the self-centering brace by frictional slipping.It provides addi⁃tional energy dissipation for the whole structure.Configuration,assembly and working principles of the connection nodes are de⁃scribed.By numerical simulation,its seismic performance is studied.The effects of design parameters of the connection node on performance are analyzed.The results show that the hysteretic response of the self-centering braced steel frame with the novel con⁃nection node is fuller.The energy dissipation capacity of the overall structure is increased by 20.81%.The actual limiting effect of the connection node on total shear force reaches 17.56%,effectively regarding the plastic development of connection node region.By changing the friction coefficient of the friction plate and the preload force of the high-strength bolts of the connection node,the slipping displacement and force can be adjusted.

关 键 词：抗震性能 自复位支撑连接节点 预制装配 摩擦耗能 滞回响应 

分 类 号：TU352.11[建筑科学—结构工程]