方钢管高强混凝土短柱有限元分析  

Finite Element Analysis of High Strength CFSST Stub Columns

作　　者：郎 杨志坚[2] 

机构地区：[1]宿迁学院建筑工程系,江苏宿迁223800 [2]天津大学建筑工程学院,天津300072

出　　处：《江苏建筑》2011年第6期36-38,共3页Jiangsu Construction

摘　　要：文章基于冷弯型方钢管高强混凝土短柱试件的轴心受压试验,采用ABAQUS通用有限元分析软件对试件的轴压工况进行数值计算。采用合理的材料本构方程、建模与网格划分方法,使有限元计算结果与试验结果吻合较好。分析了在荷载-应变典型曲线特征点时轴压短柱试件的核心混凝土横截面轴向应力分布和试件在各阶段的受力性能。得到如下结论:钢管的冷弯区域决定了核心混凝土横截面轴向应变的分布;轴压短柱达到极限承载力时,核心混凝土由于方钢管的约束作用,其抗压强度得到明显提高;文章采用的有限元模型在分析冷弯型方钢管高强混凝土轴压短柱时是可行的。Based on previous research on the experimental study of high strength concrete-filled square coldformed steel tubular （CFSST） stub columns, a finite element software ABAQUS was employed to analyze the mechanical behaviors of the stub column under axial compressive load. The results obtained from the finite element analysis were verified against experimental results with reasonable constitutive equations, finite element modeling and meshing. This paper discussed mechanical characteristics during che test with finite element method results. Some conclusions were drawn as follows： The area of cold-formed square tube determined the distribution of axial strain on the middle cross-section of core concrete. Because of confinement effect of square tube, compressive strength of core concrete was .enhanced. The element analysis modeling used in the paper was practicable in simulating high strength concrete-filled square cold-formed steel tubular stub columns.

关 键 词：冷弯方钢管 核心混凝土 高强 有限元 

分 类 号：TU392.1[建筑科学—结构工程]