钢筋混凝土双肢剪力墙非线性静力有限元分析

Nonlinear Static Finite Element Analysis of Reinforced Concrete Coupled Shear Walls

利用有限元软件ABAQUS中的混凝土损伤塑性模型,采用分离式方法建立有限元模型,对钢筋混凝土双肢剪力墙进行了非线性分析;在与试验结果进行对比分析的基础上,选取了用于钢筋混凝土剪力墙非线性有限元分析的材料破坏准则和本构关系进行建模;通过数值计算,分析了轴压比、墙连梁跨高比、墙分布钢筋配筋率、边缘构件配筋率对钢筋混凝土双肢剪力墙的承载能力、延性、破坏形态等的影响。结果表明:轴压比、分布钢筋配筋率和连梁跨高比对钢筋混凝土双肢剪力墙的受力性能影响较为明显;边缘约束构件配筋率对墙体的影响较小。

Finite element software ABAQUS was used in a concrete damage plastic model, and the nonlinear finite element was adopted to analyze the reinforced concrete coupled shear walls, according to the separate finite element model. Based on the comparison analysis with test result, the material failure criterion and constitutive relations were selected for nonlinear finite element analysis of reinforced doncrete coupled shear wall. Through the numerical calculations, the analysis also considered influences of design parameters, such as different axial compression ratios, reinforcement ratio of steel bars for wall distribution, marginal components stirrup ratio as well as span-depth ratio of coupling beam on bearing capacity, ductility, failure shape for reinforced concrete coupled shear walls. The results indicate that the factors that axial compression ratio, reinforcement ratio of steel bars. span-depth ratio of coupling beam significantly affect the mechanical behavior of reinforced concrete coupled shear walls, and the different reinforcement ratios of constraint component have little influence for wall.