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为消除重力坝角缘部位有限元应力失真的影响,采用数值方法对重力坝建基面的有限元应力进行积分,求得建基面上的轴力和弯矩,利用偏心受压公式计算出截面上的有限元等效应力分布。结果表明,有限元等效应力法可消除角缘部位的有限元应力失真现象,且不受网格尺寸的影响,计算结果和材料力学法具有相同的计算精度,得出的坝踵、坝趾应力结果可按《混凝土重力坝设计规范》规定的应力标准评价重力坝坝体安全度。
In order to eliminate the influence of the finite element stress distortion on the corner edge of the gravity dam, the finite element stress of the foundation surface of the gravity dam is integrated by numerical method, and the axial force and bending moment on the foundation surface are obtained. The eccentric compression formula Finite Element Equivalent Stress Distribution in Section. The results show that the finite element equivalent stress method can eliminate the finite element stress distortions in the corner and is not affected by the mesh size. The calculated results and the material mechanics method have the same calculation accuracy. The obtained heel, Stress Results The safety of gravity dam can be evaluated according to the stress criterion stipulated in the Code for Design of Concrete Gravity Dam.