低周水平荷载作用下高强混凝土剪力墙变形能力非线性分析

Deformability nonlinear analysis on high-strength concrete shear walls under low cyclic horizontal loading

基于4个高强混凝土剪力墙试件抗震性能的试验结果,将ABAQUS软件提供的混凝土损伤塑性模型参数与已有的混凝土本构关系结合起来,在基于能量等效原理的基础上引入损伤因子概念,模拟其加载全过程和受力性能,模拟曲线与试验曲线吻合较好。在此基础上,分析了影响高强混凝土剪力墙变形能力的主要因素,包括混凝土强度、竖向分布钢筋配筋率、水平分布钢筋配筋率、边柱箍筋体积配箍率、边柱纵筋配筋率、轴压比和剪跨比,并与试验结果进行了对比。

The experiments on seismic performances of 4 high-strength concrete shear wails （HSCW） were carried out. Based on the experimental results, the damage plasticity model parameters provided by the finite element software ABAQUS were combined with concrete constitutive relationship and damage factor was introduced based on the energy equivalence principle. The nonlinear analysis was performed to simulate the complete loading process and mechanical behaviors. The analysis results and experimental results matched well. Based on the analysis, the main factors that affect the deformability of high-strength concrete shear walls were studied, including concrete strength, reinforcement ratio with vertical and horizontal rebar distribution, stirrup volumn ratio with side columns, reinforcement ratio with side columns, axial compression ratio and shear-span ratio. The analysis results were compared with experimental results.