不锈钢芯板结构L形柱轴压性能有限元分析  

FINITE ELEMENT ANALYSIS OF AXIAL COMPRESSION PERFORMANCE FOR L-SHAPED COLUMN MADE OF STAINLESS STEEL SANDWICH PANEL WITH CORE TUBES

作　　者：舒兴平[1] 尉明光 谭永强 SHU Xingping;WEI Mingguang;TAN Yongqiang(Steel Structural Institute of Civil Engineering College,Hunan University,Changsha 410082,China;Broad Sustainable Building Co.,Ltd.,Yueyang 414600,China)

机构地区：[1]湖南大学土木工程学院钢结构研究所,长沙410082 [2]远大可建科技有限公司,湖南岳阳414600

出　　处：《工业建筑》2020年第2期40-44,50,共6页Industrial Construction

基　　金：国家自然科学基金项目(51778219)。

摘　　要：不锈钢芯板结构L形柱是充分利用夹层结构和不锈钢的优点提出的一种新型异形柱结构形式。为研究不同面板厚度、芯管厚度以及芯管间距对不锈钢夹层结构L形柱稳定承载力的影响,分析其破坏形态和屈曲模式,利用有限元软件ABAQUS建立有限元分析模型并对其做轴压荷载下的模拟,分别进行特征值屈曲分析和非线性屈曲分析,通过对单一参数变化条件下柱的屈曲模式、变形以及荷载-位移曲线等方面的分析,全面研究这种新型L形柱轴压构件的性能。研究表明:该L形柱的屈曲模式表现为弯曲屈曲,其破坏形态为局部屈曲破坏,随着面板厚度的增加,芯管对面板的约束越来越弱,对其稳定承载力的贡献越来越小,同时发现芯管厚度和芯管间距对其稳定承载力的影响很大。The L-shaped column made of stainless steel sandwich panel with core tubes is a new type of special-shaped column,which makes full use of the advantages of sandwich structure and stainless steel. In this paper,the influence of the panel thickness,the wall thickness of core tube and the spacing of the core tube on the stability of the L-shaped column was studied. The finite element software ABAQUS was used to establish the finite element model and simulate its axial compression performance. The eigenvalue buckling analysis and nonlinear buckling analysis were carried out respectively. The buckling mode,deformation and loading-displacement curve under single sectional parameter change were analyzed. The research showed that the buckling mode of the L-shaped column was flexural buckling,and its failure mode was local buckling failure. With the increase of the panel thickness,the constraint of the core tubes to the panel became weaker and weaker,and the contribution to the stability became smaller and smaller. At the same time,it was found that the influence of the wall thickness of the core tube and the spacing of the core tube on the stability was obvious.

关 键 词：不锈钢 夹层结构 异形柱 轴压性能 屈曲分析 

分 类 号：TU392.4[建筑科学—结构工程]