外套管式节点装配式钢框架结构抗连续性倒塌研究  

Research on the progressive collapse resistance of assembled steel frame structure with outer tubular joints

作　　者：杨元强 刁延松[1,2] 李国华 郭荡 YANG Yuanqiang;DIAO Yansong;LI Guohua;GUO Dang(School of Civil Engineering,Qingdao University of Technology,Qingdao 266525,China;Cooperative Innovation Center of Engineering Construction and Safety in Shandong Blue Economic Zone,Qingdao 266525,China)

机构地区：[1]青岛理工大学土木工程学院,青岛266525 [2]山东省高等学校蓝色经济区工程建设与安全协同创新中心,青岛266525

出　　处：《青岛理工大学学报》2022年第6期47-57,共11页Journal of Qingdao University of Technology

基　　金：山东省重点研发计划(公益类专项)项目(2019GHY112039)。

摘　　要：根据外套管式梁柱节点各组件的受力特点,利用组件法建立简化模型,分析节点的弯矩-转角关系。利用ABAQUS软件分别建立普通刚性节点和外套管式组件节点装配式平面钢框架结构的有限元模型,采用非线性静力分析及非线性动力分析方法对二者进行抗连续性倒塌研究。研究结果表明,外套管式组件节点简化模型能较为准确地模拟外套管式节点的弯矩-转角关系。采用外套管式组件节点简化模型的钢框架的倒塌荷载低于刚性节点钢框架模型,其失效点最大位移为刚性节点钢框架模型的1.5倍左右,因此,应考虑节点刚度对结构抗倒塌能力的影响。另外,给出了采用非线性静力分析方法对两种平面钢框架结构进行抗连续性倒塌研究时的动力放大系数推荐值。Based on the stress characteristics of components of outer tubular beam-column joint, this study employs the component method to establish the simplified joint model and analyze the moment-rotation relationship. The finite element model of plane steel frame structure with rigid joints and outer casing type component joints are established by using the finite element software ABAQUS. Nonlinear static analysis and nonlinear dynamic analysis methods are employed to analyze their progressive collapse resistance separately. The results show that the simplified model of outer casing type component joints can accurately simulate the moment-rotation relationship of the outer tubular joints. The collapse load of the steel frame with simplified model of outer casing type component joints is lower than that of the steel frame with rigid joints, and the maximum displacement at its failure point is about 1.5 times that of the steel frame with rigid joints. Therefore, the effect of joint stiffness on the collapse resistance of the structure should be considered. In addition, the recommended value of dynamic amplification factor for the continuous collapse resistance study of two flat steel frame structures using nonlinear static analysis methods is given.

关 键 词：装配式钢框架 连续性倒塌 外套管式节点 组件法 备用荷载路径法 

分 类 号：TU391[建筑科学—结构工程]