基于性能的钢筋混凝土剪力墙变形能力分析研究

Deformation-based nonlinear finite element analysis on reinforced concrete structural walls

以钢筋混凝土剪力墙试验研究为基础,采用有限元软件ABAQUS建立了剪力墙的非线性有限元模型.对构件加载的全过程进行模拟,考虑材料的非线性本构关系、损伤模型和受拉开裂后的行为,与试验结果进行对比;计算曲线与试验曲线吻合良好,验证了有限元分析模型的准确性.分析影响变形能力的主要参数,包括轴压比、配筋率、高宽比和配箍特征值.提出不同轴压比和极限顶点位移角情况下约束边缘构件长度与配箍特征值的设置要求.用三种计算方法计算了极限位移角为1/100或位移延性比为3时所需的约束边缘构件长度和配箍特征值,并与有限元结果进行了对比.

Based on the experiment with reinforced concrete （RC） structural walls, nonlinear finite element analysis was performed to simulate the complete process of the loading and concrete crack of RC structural walls in the platform of ABAQUS. The nonlinear of material is taken into account in the models. The rationality and reliability of the finite element model was verified through the comparison of the finite element analysis results with the experimental results. Based on the proposed finite element model, the parametric analysis was carried out to define the effect of the axial load ratio, height-width ratio, stirrup characteristic value and the reinforcement ratio. Three kinds of deformation design method on structural walls are used to calculate the stirrup characteristic value and the length of confined zone when the drift ratio is 1/100 or the ductility ratio is three, and are compared with finite element results. The results the stirrup characteristic value and the length of confined zone are put forward.