双轴荷载作用下工字形钢筋混凝土矮墙的抗剪承载力研究

Study on shear capacity of h-shaped reinforced concrete squat walls under biaxial loading

为研究双轴荷载作用下工字形钢筋混凝土(RC)矮墙的抗剪承载力,运用DIANA有限元软件对单轴、“8”字形和“十”字形3种加载制度下的工字形RC矮墙的抗震性能进行数值模拟。分析翼缘宽度、轴压比、翼缘纵筋配筋率和腹板纵筋强度对其抗剪承载力的影响。研究表明,双轴加载路径下工字形RC矮墙存在较为明显的双轴耦合效应,其中“8”字形加载下双轴耦合效应最为明显。在一定范围内,工字形RC矮墙在2个主轴方向上的抗剪承载力均随着翼缘宽度、轴压比、翼缘纵筋配筋率和腹板纵筋强度的增加而增加。

In order to study the Shear capacity of H-shaped reinforced concrete(RC)squat walls under biaxial loading,The DIANA finite element software is used to carry out numerical simulation of H-shaped RC squat wall under three different loading systems:uniaxial,loading path"8"and loading path"+".The effects of flange widths,axial load ratios,stresses of vertical web reinforcement and vertical flange reinforcement ratios on the shear capacity are analyzed.The results show that the biaxial coupling effect of H-shaped RC squat wall under biaxial loading path is obvious,and the biaxial coupling effect of H-shaped RC squat wall under biaxial loading path"g"is the most obvious.In a certain range,the shear capacity of H-shaped RC squat wall in different directions increases with the increase of flange widths,axial load ratios,stresses of vertical web reinforcement and vertical flange reinforcement ratios.