用双剪强度理论解混凝土板冲切的轴对称问题

SOLUTION OF THE AXISYMMETRICAL PUNCHING PROBLEM OF CONCRETE SLAB BY THE TWIN SHEAR STRENGTH THEORY

摘要: 本文采用双剪强度理论,对混凝土板轴对称冲切破坏强度进行了计算。采用刚塑性模型,给出轴对称破坏机构,得到极限应力圆的包络线为二条直线,再利用虚功方程求得破坏荷载的上限。公式形式简单,与已有结果相比符合很好。
- 双剪强度理论 /
- 混凝土板 /
- 轴对称问题 /
- 冲切破坏强度
Abstract: in this paper, the axisymmetrical ultimate punching Strength of concrete slabs is obtained by using the twin shear strength theory. Rigid-plastic model has been adopted, an axisymmetrical failure mechanism given, the envelope of failure Mohr circles is found to be two straight lines. Then,the upper-bound of ultimate punching load is obtained by the virtual work equation. The numerical results are shown to be satisfactory compared with known results.
- twin shear strength theory /
- concrete slab /
- axisymmetrical problem /
- ultimate punching strength