【摘要】 广义Hoek-Brown强度准则广泛用于岩石工程,但其没有考虑中间主应力效应.为此,根据双剪模型和广义Hoek-Brown强度准则,建立了广义非线性统一强度理论.该理论的极限面覆盖了全部外凸区域,构成岩石材料在主应力空间的全部极限面,广义Hoek-Brown强度准则和岩石广义非线性双剪强度准则是其特例.广义非线性统一强度理论的内边界是广义Hoek-Brown强度准则,外边界是岩石广义非线性双剪强度准则,其间是一系列新的极限面.广义非线性统一强度理论可以将统一屈服准则、统一强度理论、岩石非线性统一强度理论联系在一起.更多还原

【Abstract】 The generalized Hoek-Brown strength criterion is used widely in rock engineering.The effect of the intermediate principal stress,however,is not taken into account in the Hoek-Brown criterion.The twin-shear models and the generalized Hoek-Brown strength criterion were generalized and combined into a generalized nonlinear unified strength theory.The serial limit surfaces of the generalized nonlinear unified strength theory cover the whole convex region,and encompasses the generalized Hoek-Brown strength criterion and the generalized nonlinear twin shear strength criterion as two special cases.In the stress space,the inner bound of limit surface of the generalized nonlinear unified strength theory is the generalized Hoek-Brown strength criterion,and the outer bound is the generalized twin shear strength criterion.A series of new limit surfaces cover the all region between these two bounds.As a result,the unified yield criterion,the unified strength theory,the rock nonlinear unified strength theory can be linked with the generalized nonlinear unified strength theory.更多还原