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混凝土坝的断裂研究对大坝的安全运行有着重大的意义。目前对混凝土材料的断裂韧度和裂缝失稳判据进行了较多的实验研究,并有了一些初步的成果。 本文应用边界元法研究混凝土结构的裂缝稳定问题。因裂缝结构含有不连续的裂缝表面,若将边界元法直接用于裂缝问题,则所得到的边界元方程的系数矩阵是奇异
The research of the concrete dam’s rupture is of great significance to the safe operation of the dam. At present, more experimental research on the fracture toughness and fracture instability criteria of concrete materials has been carried out, and some preliminary results have been obtained. In this paper, the boundary element method is used to study the crack stability of concrete structures. Since the fracture structure contains discontinuous fracture surfaces, if the boundary element method is applied directly to the fracture problem, the coefficient matrix of the resulting boundary element equation is singular