混合连接自复位节点的力学分析  

Mechanism of Joint of Self-centering Frame with Hybrid Connection

作　　者：简斌[1,2] 龚春玉 王康[3] 綦露 

机构地区：[1]重庆大学土木工程学院,重庆400045 [2]山地城镇建设与新技术教育部重点实验室(重庆大学),重庆400045 [3]中南建筑设计院股份有限公司,武汉430071

出　　处：《结构工程师》2017年第2期115-121,共7页Structural Engineers

基　　金：中央高校基本科研业务费专项项目(106112015CDJXY200004)

摘　　要：混合连接是一种预应力装配式混凝土结构的节点连接方式,作为最早提出的自复位结构形式,具有明确而典型的自复位受力特征,应用越来越广泛,有着极大的研究价值。因此,将以混合连接自复位节点作为自复位结构的出发点,深入分析其力学特征、自复位机理。本文提出了叠加法、四状态分析法和数值计算法用于分析混合连接自复位节点连接截面的弯矩-转角关系。研究发现,叠加法得出了具有典型"旗形"滞回特点的混合连接本构模型,表明其具有良好的自复位能力和理想的耗能能力;四状态分析法以四种特殊状态的弯矩-转角关系为控制点,较为精确地得到关键连接截面的本构关系,有助于自复位节点的受力分析和设计;数值计算法则可以得到连续光滑的弯矩-转角关系,用于模拟混合连接自复位节点的全过程受力特征。Hybrid connection is a connecting method in prestressed prefabricated concrete structures and is more and more widely used. As the earliest proposed self-centering structure, it has the clear and typical self- centering mechanism and has great application value. Therefore, this paper makes hybrid connection as the starting point of the entire self-centering structure, and make further study of its mechanical characteristics. In order to solve the M-0 relationship of the beam-column connection section of the hybrid connection self- centering joints, this paper puts forward a superposition method, a four-state comprehensive analysis method and the numerical method respectively. The analysis results show that ： （ 1 ） With superposition method, the hysteresis constitutive model with typical ＂flag＂ hysteresis characteristic can be obtained which shows that hybrid connection has good self-centering ability and energy dissipation capacity; （2） Four-state comprehensive analysis method is based on four control points which are the relation of four special conditions. What＇ s more,it can be more accurate to obtain the constitutive model of the key connection section, so it is useful to simplify the mechanism analysis and design; （3） Numerical methods can get a continuous smooth relation, and can be used to simulate the mechanical characteristics of the hybrid connection self-centering joints during the whole process.

关 键 词：混合连接 自复位结构 节点 力学特征 

分 类 号：TU378[建筑科学—结构工程]