含暗牛腿顶底摩擦耗能自复位混凝土梁柱节点的滞回性能  

HYSTERICAL BEHAVIOR OF AN UPPER-BOTTOM FRICTION DAMPER SELF-CENTERING PRESTRESSED CONCRETE BEAM-COLUMN CONNECTION WITH HIDDEN CORBEL

作　　者：马俊峰 周臻[1] 陈耀刚 张军 MA Junfeng;ZHOU Zhen;CHEN Yaogang;ZHANG Jun(Key Laboratory of Concrete and Prestressed Concrete Structures of the Ministry of Education,Southeast University,Nanjing 210096,China;Jiangsu Zhongnan Construction Industry Group Co.,Haimen 226100,China)

机构地区：[1]东南大学混凝土及预应力混凝土结构教育部重点实验室,南京210096 [2]江苏中南建筑产业集团有限责任公司,江苏海门226100

出　　处：《工业建筑》2020年第1期16-21,124,共7页Industrial Construction

基　　金：国家重点研发计划项目(2018YFC0705700);国家自然科学基金(51878150);江苏省重点研发计划资助项目(BE2018675)

摘　　要：对一种含暗牛腿的顶底摩擦耗能预应力装配式自复位混凝土框架(HC-FD-SCPC)梁柱节点,采用OpenSees有限元软件开展滞回性能模拟,分析该节点的工作机理和力学性能。该节点由预应力筋提供自复位能力,顶底摩擦耗能器进行摩擦耗能,并通过在柱上设立暗牛腿改善剪力传递机制,便于现场安装。对预应力筋截面面积、初始预张力、摩擦耗能器摩擦力等参数分析表明:预应力筋截面面积增加能提高第二刚度;初始预张力增加能提高节点张开启动力;摩擦耗能器的摩擦力增加能提高节点张开启动力和耗能性能。The upper-bottom friction damper self-centering prestressed concrete beam-column connection with hidden corbel was numerically simulated by OpenSees to verify its hysteretic behavior,and analyzed the working mechanism and mechanical properties.The results showed that prestressed tendons provided self-centering capability to the connection,upper-bottom friction dampers were used to dissipate energy,and the hidden corbel was designed to improve the shear force transfer mechanism and reduce the difficulties of the fabrication.The cross-sectional area of the prestressed tendons,the initial prestressing forces and the friction forces of the friction damper were analyzed in order to study its hysteretic behavior and energy dissipation capacity.The results showed that the increase of cross-sectional area of the prestressed tendons could increase the second stiffness of the beam-column connection.The increase of initial prestressed forces could increase the gap opening forces of the beam-column interface.The increase of the frictions of the dampers could increase the gap-opening forces of the beam-column interface and energy dissipation performance.

关 键 词：自复位 摩擦耗能 预应力混凝土梁柱节点 滞回曲线 暗牛腿 

分 类 号：TU37[建筑科学—结构工程]