钢管混凝土边框内藏钢桁架组合筒体弹塑性有限元分析

Elastic-Plastic Finite Element Analysis of Composite Core Walls With Concrete Filled Steel Tube Columns and Concealed Steel Truss

为了对钢管混凝土边框混凝土组合核心筒和钢管混凝土边框内藏钢桁架组合核心筒参数优化设计,在试验研究基础上,运用ABAQUS通用有限元分析软件,建立了有限元分析模型,对其在水平荷载作用下的力学性能进行非线性分析,研究了轴压比、高宽比、扭矩对筒体性能的影响.分析结果表明:随着轴压比的增大,筒体最大水平承载力呈先增加后减小的变化规律,延性变差;随着高宽比的增大,筒体延性增加,整体弯曲作用更加明显;随着扭矩的增大,筒体水平承载力呈下降趋势.

In order to optimally design core walls with concrete filled steel tube columns and core walls with concrete filled steel tube columns and concealed steel truss, on the basis of test, the models were set up and nonlinear analysis was made in a horizontal load by the general finite element analysis software ABAQUS. By the correct model, the axial compression ratio, depth-width ratio and eccentricity were changed to study the impact on the model. The analysis results show that by increasing axial compression ratio, the load-carrying capacity increases at first, decreases in the end, and the ductility reduces. By increasing the depth-width ratio, the ductility of the model is increased and overall bending effect is more obvious. By the torque increasing, the load-carrying capacity of the model is decreasing gradually