基于悬挂连接的韧性钢框架梁柱节点抗震性能数值模拟  

NUMERICAL ANALYSIS ON SEISMIC PERFORMANCE OF RESILIENT STEEL BEAM-COLUMN JOINTS USING SUSPENDED CONNECTIONS

作　　者：赵俊贤[1,2] 蔡泽鑫 邵旭东 张景程 郝贵强 石晓娜 ZHAO Junxian;CAI Zexin;SHAO Xudong;ZHANG Jingcheng;HAO Guiqiang;SHI Xiaona(State Key Laboratory of Subtropical Building Science,South China University of Technology,Guangzhou 510641,China;School of Civil Engineering and Transportation,South China University of Technology,Guangzhou 510641,China;Xinjiang Architectural Design Institute,Urumqi 830002,China;Zhongtu International Architectural Design Co.,Ltd.,Shijiazhuang 050000,China)

机构地区：[1]华南理工大学亚热带建筑科学国家重点实验室,广州510641 [2]华南理工大学土木与交通学院,广州510641 [3]新疆建筑设计研究院,乌鲁木齐830002 [4]中土大地国际建筑设计有限公司,石家庄050000

出　　处：《工业建筑》2021年第8期79-86,共8页Industrial Construction

基　　金：广东省自然科学基金杰出青年项目(2021B1515020057);乌鲁木齐市建设科技项目(201815);中央高校基本科研业务费重点项目(D2191400)。

摘　　要：为解决震后钢框架梁端因塑性损伤导致的残余变形过大而无法修复的问题,提出一种具有低损伤和易拆卸的新型韧性钢框架梁柱节点,在梁上翼缘顶部采用悬挂抗剪连接形成旋转中心,在梁下翼缘通过屈曲约束板拉压屈服耗散地震能量。通过ABAQUS有限元软件对该节点受力性能开展研究,提出悬挂栓接和悬挂焊接两种构造,并与传统焊接节点进行对比。结果表明:该节点与传统节点具有相同弹性刚度,屈服耗能主要集中在屈曲约束板,有效避免梁端塑性损伤、屈曲和断裂,显著提高节点的震后可恢复性;在弹塑性阶段,节点旋转中心基本位于梁上翼缘附近,节点弯矩主要由屈曲约束板和悬挂抗剪连接的拉压力偶提供,滞回环饱满稳定;悬挂栓接和悬挂焊接对节点性能无显著影响。In order to solve the problem that the residual defomation at the bean ends of steel frame caused by platic damage after the earthquake is too large to be repaired,a new resilient steel beam-column joint featured with low damage and easy maintenance is proposed.The top of the upper flanges of the beams adopt suspended shear connections to form the center of rotation.The bottom flanges of the beams are connected by buckling-restrained plate(BRP),which is used to dissipate seismic energy.ABAQUS finite element software was used to study the mechanical performance of the new joint,in which the suspended connections with steel angle bolted configuration and steel angle welded configuration on the top flange were considered,and their performance was compared with the traditional welded joint.The results showed that the new joint had comparable stiffness to the traditional one,and energy dissipation was concentrated in the BRP.Thus,damage and local buckling near the beam end could be avoided and resiliency of the joint could be significantly improved.In elasto-plastic range,the rotation center of the new joint concentrated near the beam top flange,and bending moment was contributed mainly by the axial force from the BRP and the suspended connection,with stable cyclic performance.The configuration of suspended connection did had little effect on the performance of the new joint.

关 键 词：韧性 钢框架 梁柱节点 悬挂连接 屈曲约束板 有限元分析 

分 类 号：TU391[建筑科学—结构工程] TU352.11