混凝土剪力墙结构静力非线性分析的弯剪模型及实现

为发展剪力墙结构的精细化非线性分析方法,对剪力墙静力非线性分析方法及实现技术进行了系统研究.首先基于钢筋混凝土薄膜元软化桁架理论,考虑弯曲和剪切的耦合,在对约束边缘构件混凝土数值模型比较的基础上,提出了混凝土实体墙的数值模型.然后对比数值分析与已有试验数据的荷载位移关系,发现二者符合较好,表明该方法能反映结构整体受力性能.最后通过对连梁数值模型和整体建模方法的研究,提出了开洞混凝土墙体静力非线性分析的模型和方法,数值仿真结果与已有的联肢墙试验结果的荷载-位移曲线对比表明,二者的初始刚度以及初始转折点位置符合良好,极限承载力接近,分析曲线能够较好地反映实际双肢墙荷载位移发展的总体趋势.

Nonlinear static analytical shear-flexure model of RC shear wall structure and its realization

It is necessary for better understanding and grasp on seismic performance of RC(reinforced concrete) shear wall structures to develop its fine nonlinear analysis method.Systemic study on nonlinear static analysis and its realization method are carried out.Beginning with rotating-angle softened-truss model for coupled shear and flexural responses,shear-flexure analytical model of solid wall is presented based on the comparative study on four types of constitutive law of concrete for confined concrete of boundary zone.Good agreements between analytical and experimental load-displacement relation are found,which indicates that the proposed analytical method can well reflect the global mechanical behavior of shear wall well.Study on coupling beam and global perforated wall modeling is implemented,then modeling and nonlinear static analysis method for perforated wall is proposed.By comparing analytical load-displacement curve to experimental results,it is shown that initial stiffness and first turning point agree well and analytical ultimate capacity is close to experimental,which shows that the load-displacement curve can actually exhibit the general load-displacement trend of perforated wall.