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本文用特解边界元法及蒙特卡罗边界法计算了弹性地基上重力坝坝踵界面裂缝的断裂可靠度,找出了断裂韧度的均值是影响坝踵界面裂缝可靠度的主要因素,同时指出:区分裂缝的类型对断裂可靠度计算来说是十分重要的。文中还定量分析了地基刚度对裂缝断裂可靠度的影响。计算结果表明:地基刚度对裂缝断裂可靠度的影响甚大,不可忽视。计算还表明:扬压力对断裂可靠性来说仍是一种极为不利的因素。
In this paper, the fracture reliability of interface cracks in gravity dams on elastic foundations is calculated by the special solution boundary element method and Monte Carlo boundary method. The mean value of fracture toughness is the main factor affecting the reliability of cracks at the interface between dams and dams. It is pointed out that distinguishing the type of fracture is very important for the calculation of fracture reliability. The paper also quantitatively analyzes the influence of foundation stiffness on fracture fracture reliability. The calculation results show that the foundation stiffness has a great influence on the fracture fracture reliability and cannot be ignored. The calculations also show that the lifting pressure is still a very unfavorable factor for fracture reliability.