三剪统一强度理论在轴对称混凝土板冲切问题中的应用

Punching Analysis for Axisymmetric Concrete Slabs Based on the Triple-shear Unified Strength Criterion

采用三剪统一强度理论作为混凝土的破坏准则,求解了轴对称混凝土板的冲切破坏强度,得出强度理论参数b对冲切强度影响曲线。结果表明强度理论参数b的取值不同,冲切破坏荷载的取值也不同,对于一定的板厚,破坏荷载随着b值的增大而增大。Mohr-Coulomb为其特殊情况的解,与Mohr-Coulomb准则相比,三剪强度统一准则的计算结果更接近试验值和实际值。

Using the triple-shear strength Criterion theory as a failure criterion of concrete to solve the punching shear strength analysis of axisymmetric concrete slabs,the punching theory strength curve based on the shear strength parameters b was obtained.The result show that different shear strength parameters b have different punching failture loads.For a given thickness of concrete slabs,the limit load increases with increasing value of b.Mohr-Coulomb is a particular solution,compared with Mohr-Coulomb,the triple-sheas strength Criterion theory is closer to the experimental and the actual.