STRENGTH OF CONCRETE SLABS IN PUNCHING SHEAR
STRENGTH OF CONCRETE SLABS IN PUNCHING SHEAR
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DOI：
10.1061/(asce)0733-9445(1986)112:12(2578
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发表时间：
1986-12
期刊：
影响因子：
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通讯作者：
D. Jiang;Jingsi Shen
中科院分区：
文献类型：
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作者：
D. Jiang;Jingsi Shen
给出了混凝土板冲切强度的理论解。该问题被处理为三维轴对称问题，材料假定为刚塑性。提出了混凝土的破坏准则，其中库仑-莫尔屈服包络采用二次抛物线。通过建立虚功方程，得到了比著名的Braestrup-Nielsen解更简单的上界解。当冲切角度小于混凝土的摩擦角时，也可以给出极限冲切剪荷载。并提出了不同简化程度的混凝土板冲切极限强度的简化表达式，以供实际应用。文中还对破坏面上的正应力、剪应力和主应力进行了探讨。
A theoretical solution for the punching shear strength of a concrete slab is presented. The problem is treated as a three-dimensional axisymmetrical one, the material being assumed to be rigid-plastic. A failure criterion for the concrete is suggested, in which a second-degree parabola is used for a Coulomb-Mohr yield envelope. By establishing the virtual work equation, an upper-bound solution is obtained, which is simpler than the well-known Braestrup-Nielsen solution. It can also give the ultimate punching shearing load when the punch angle is smaller than the angle of friction of concrete. Simplified expressions for the ultimate strength of a concrete slab in punching shear with different degrees of simplification are also suggested for practical use. The normal, shearing, and principal stresses along the failure surface are also explored.