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基于最大拉应变断裂理论，推导出了混凝土Ⅰ和Ⅱ复合型裂缝在静力荷载作用下缝端附近损伤区的边界方程式，给出了允许损伤尺度的定义、计算公式和损伤断裂判据，实现了损伤与断裂力学的有机结合．计算求得的损伤区长度与实测结果基本相符．
Based on the theory of maximum tensile strain fracture, the boundary equations of the damage zone near the joint end of the composite I and II composite cracks under static load were deduced, and the definition of the allowable damage scale, calculation formula and damage fracture criterion were given. The organic combination of damage and fracture mechanics. The calculated damage zone length is basically consistent with the measured results.