安徽工程大学学报2018，Vol.33Issue(2)：78-85,8.
改进的组合式L形钢管混凝土长柱轴压性能非线性分析
Nonlinear Behavior of Improved Composite L-shaped Concrete-filled Steel Tubular Long Columns Subjected to Axial Compression Load
摘要
Abstract
The finite element software ABAQUS was used to analyze the nonlinear behavior of improved composite L-shaped concrete-filled steel tubular long columns subjected to axial compression load,inclu-ding the failure modes,load-axial displacement curves,load-lateral deflection curves and the interaction among steel tube,support steel plate and core concrete.The results show that:the failure modes of spec-imens are mainly divided into bending failure and strength failure.The thickness of steel tube and the slenderness ratio have a greater influence on the load-axial displacement curve of the specimen and the influence of the concrete strength and the support steel plate on the load-axial displacement curve is smaller.The slenderness ratio,support steel plate and steel tube thickness has great influence on the load-lateral deflection curve.From the beginning of loading to 75% peak load,the axial load ratio of steel tube and core concrete changes little.To 100% peak load,the axial load ratio of the steel tube increases, the axial load ratio of the core concrete decreases.Compared with the specimens without support steel plate,the contact pressure of the specimens with support steel plate is more uniform.The support steel plate in the rectangular steel tube can improve the restraint effect of the steel tube on the core concrete. The formulas (1)and (11)for calculating the axial compressive stability bearing capacity are less than those calculated by the finite element method.关键词
L形钢管混凝土/长柱/轴压性能/非线性分析Key words
L-shaped concrete-filled steel tube/long column/axial compress behavior/nonlinear analy-sis/interaction分类
建筑与水利引用本文复制引用
曹兵,王义俊,张金轮,黄博,杜怡韩,黄俊..改进的组合式L形钢管混凝土长柱轴压性能非线性分析[J].安徽工程大学学报,2018,33(2):78-85,8.基金项目
安徽省自然科学基金资助项目(1708085QE121) （1708085QE121）
