混凝土裂缝端部断裂过程区的粘聚力分布是导致混凝土断裂呈现非线性特性的重要原因。基于混凝土的断裂特性和虚拟裂缝端部存在粘聚力的分析模型 ,并通过分布函数的特性分析 ,提出了粘聚力分布函数的两种简化表达式 :一为单参数待定式 ,另一为双参数待定式。由变形体叠加原理 ,推导出计算单参数待定函数公式和计算双参数待定函数代数方程组。进而通过裂缝张开位移实测数据即可求得粘聚力分布 ,并且给出了适当的算例分析和讨论 The cohesion distribution in the process of the end of the concrete crack is the important reason that leads to the non-linearity of the concrete. Based on the fracture characteristics of concrete and the analysis model of cohesion at the end of virtual fracture, two simplified expressions of cohesion distribution function are proposed by the analysis of the characteristics of distribution function: one is one-parameter to be determined and the other is Two parameters to be determined. Based on the principle of superposition of deformation bodies, the equations for calculating single-parameter undetermined function and the algebraic equations for calculating two-parameter undetermined function are deduced. Then the distribution of the cohesion can be obtained through the measured data of the crack opening displacement, and an appropriate example analysis and discussion is given