用刚体弹簧元研究梅花拱坝的破坏机理

Failure simulation of the Meihua arch dam

提出了使用非连续介质力学模型在满足刚度、强度和荷载等效的基础上模拟连续介质的方法 ,以研究结构大变形破坏过程。使用三维刚体弹簧元对梅花拱坝由于周边缝设计施工不当造成拱坝破坏的机理与过程进行了仿真研究。重现了拱坝在周边缝抗滑摩擦因数不足时 ,坝体整体上滑 ,拱座失去支承 ,导致拉应力急速恶化 ,坝体断裂并最终溃决的过程。

A 3 D rigid body spring element method was used to simulate continuum failure behaviour based on the equivalent stiffness, strength and external loads. The failure of the Meihua arch dam due to insufficient friction resistance of the peripheral joints was studied using this method. The results demonstrate that the procedure can simulate the failure of arch dams and foundations due to insufficient strength of the concrete rock interface or peripheral joints. The analysis can also be applied to simulate...