摘要
为精准考量自复位节点的初始转动刚度和明确连接件间摩擦对初始转动刚度的贡献,设计了一种摩擦型腹板自复位梁柱延性节点.该节点由摩擦腹板、预应力索、上下狗骨形翼缘连接板、黄铜摩擦片、高强度摩擦型螺栓构成.设计了两种不同尺寸的狗骨形翼缘连接板和不同预应力的预应力索,并通过试验得到节点弯矩-转角及各组件的相关材性数据.随后,基于欧洲规范EC3中组件法相关原理,推导得到该节点初始转动刚度计算公式.引入Iwan模型表征摩擦的力学行为,将摩擦腹板中的摩擦等效为组件法中的弹簧模型.试验结果与计算公式对比分析表明,二者吻合良好且摩擦腹板对转动刚度的贡献不可忽略.
To accurately consider the initial rotational stiffness of self-centering joints and determine the contribution of friction between the connectors to the initial rotational stiffness in structural analysis,a friction web self-centering beam-column ductile joint was designed.The joint is composed of friction web,prestressed cables,upper and lower dog-bone flange connection plates,brass friction plates and high-strength friction bolts.Two different sizes of dog-bone flange connection plates and different prestressed cables were designed,and the bending moment-rotation angle of the joint,along with the relevant material data of each component,was obtained from the test.Then,a calculation formula of initial rotational stiffness is obtained based on the component method defined in EC3.To represent the friction of the friction web as an equivalent spring in the component method,the Iwan model is introduced to describe the mechanical behavior of friction.Comparison between the test results and the calculated values shows good agreement,indicating that the contribution of the friction web to the rotational stiffness cannot be ignored.
作者
周凌宇
许磊
陈浩
阳凡
王其良
方蛟鹏
贺学军
ZHOU Lingyu;XU Lei;CHEN Hao;YANG Fan;WANG Qiliang;FANG Jiaopeng;HE Xuejun(School of Civil Engineering,Central South University,Changsha 410075,China;China National Engineering Laboratory of High-Speed Railway Construction Technology(Central South University),Changsha 410075,China;Hunan Construction Investment Group Co.,Ltd.,Changsha 410029,China)
出处
《湖南大学学报(自然科学版)》
北大核心
2026年第3期35-43,共9页
Journal of Hunan University:Natural Sciences
基金
国家自然科学基金资助项目(51978662)。
关键词
自复位节点
初始转动刚度
摩擦腹板
组件法
Iwan模型
self-centering joints
initial rotational stiffness
friction web
component method
Iwan model
