SOLUTION OF AXISYMMETRICAL PUNCHING STRENGTH OF CONCRETE SLABS WITH THE UNIFIED STRENGTH THEORY
SOLUTION OF AXISYMMETRICAL PUNCHING STRENGTH OF CONCRETE SLABS WITH THE UNIFIED STRENGTH THEORY
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发表时间：
2002
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通讯作者：
Wei Xue-ying
中科院分区：
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作者：
Wei Xue-ying
本文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。混凝土的破坏准则采用余氏统一强度理论。UST可以考虑中间应力的影响。通过建立虚功方程，得到了一系列极限冲压载荷的上界。研究了加载面积大小、系数b等变量对极限冲压载荷的影响。通过与姜申模型和实验结果的比较，验证了理论模型的正确性。
A theoretical solution of the punching shear strength of a concrete slab is obtained in this paper. The problem is treated as a three-dimensional axisymmetrical one, the material being assumed to be rigid-plastic. Yu’s unified strength theory (UST) is used for the failure criterion of concrete. The UST can take account of the intermediate stress effect. By establishing the virtual work equation, a series of upper-bound of ultimate punching loads are obtained. The influence of variables, such as the size of loaded area and the coefficient b, on the ultimate punching load is investigated. The theoretical model is verified through comparison with Jiang-shen model and experimental results.