转换层桁架非线性地震损伤分析  

Nonlinear seismic damage analysis of truss structure at transfer story

作　　者：徐龙河[1] 张建华 吕杨[3] 

机构地区：[1]北京交通大学,北京100044 [2]唐山市节能监察监测中心,河北唐山063004 [3]天津大学,天津300072

出　　处：《土木工程学报》2013年第S2期45-49,共5页China Civil Engineering Journal

基　　金：国家自然科学基金面上项目(51178034);高等学校学科创新引智计划项目(B13002)

摘　　要：倒V型柱转换层具有承担和分散上部竖向荷载,以及承受地震作用等多重功能,作为连接上下左右结构构件的重要枢纽,对其抗震可靠性需要作详细深入的分析,以检查其在各种荷载作用下的非线性工作性能、校核设计可靠性、发现薄弱部位等,进而为改进结构设计提出建议。以一实际工程为例,采用考虑弹塑性损伤的混凝土材料模型和混合强化的钢材模型,应用LS-DYNA有限元软件针对转换层X向钢-混凝土组合桁架在大震、中震和小震各工况荷载下结构混凝土和型钢应力分布、混凝土开裂破坏以及结构变形状态等进行分析,以检验转换层结构在小震、中震和大震各工况下所处状态。The inverted V-type column transfer story can bear the upper load and resist the earthquake actions,as the connection of the up and down around members,its seismic performance should be analyzed intensively to check the nonlinear properties,designed reliability,weak region under different load cases etc.,and to further improve structural design measures.In this paper,based on a practical structure,the steel-concrete composite truss in X direction of the transfer story under big,middle,and small earthquakes are analyzed using the elastic-plastic damage material model of concrete and combined hardening steel model in LS-DYNA program,both the concrete and steel stress,the cracks of concrete,and the deformation of the truss are all analyzed to verify the working status of transfer story under small,middle,and big earthquakes.

关 键 词：转换层 组合结构 倒V型柱 弹塑性分析 损伤本构模型 

分 类 号：TU352.11[建筑科学—结构工程] TU323.4