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Maksimovic峰值剪切强度准则形式简洁,参数的物理含义明确,但由于反映节理粗糙程度的特征量“粗糙度角??”须由试验值确定,因此不可用于估算岩石节理的峰值剪切强度。改进的Maksimovic峰值剪切强度准则在继承原准则优点的基础上,采用定量化的三维形貌参数表示节理的“粗糙度角??”。采用岩石节理的直剪切试验数据对改进的Maksimovic峰值剪切强度准则进行了试验验证,计算值与试验值具有很好的相关性,表明可以采用该准则估算岩石节理的峰值剪切强度。
The Maksimovic peak shear strength criterion is concise, and the physical meaning of the parameters is clear. However, the peak shear strength of the rock joints can not be used to estimate the peak shear of rock joints strength. The improved Maksimovic peak shear strength criterion, based on the advantages of the original criterion, uses the quantitative three-dimensional topography parameters to represent the “roughness angle” of joints. The improved Maksimovic peak shear strength criterion is validated by using the data of direct shear tests of rock joints. The calculated values are in good agreement with the experimental values, indicating that this criterion can be used to estimate the peak shear strength of rock joints.