拱坝-地基破坏的数值模型与溃坝仿真

本文使用刚体弹簧元模型来模拟拱坝-地基这类非连续介质和连续介质组成的系统，对一个悬臂梁的位移场和应力场的计算并与有限元方法计算结果的对比表明，这种方法具有良好的精度.应用这一模型对玛尔帕塞拱坝的溃坏进行了仿真，重现了拱坝的破坏过程，探讨了拱坝坝肩滑动失稳的原因，计算结果表明坝肩岩体裂隙和断层的强度不足是导致整个拱坝溃毁的关键因素.

Numerical modeling of dam-foundation failure and simulation of arch dam collapse

The 3-D rigid body-spring element method is applied to simulate the behavior of the arch damabutment system consisted of continuum and discontinuous media. The principle of the method is described and the accuracy of this method is verified by comparing the predicted displacement field and stress field of a cantilever beam with the analysis by means of FEM. Detailed study on the failure process of Malpasset Arch Dam is carried out. The result demonstrates that insufficient strengths of rock uoints and faults of the abutment are the crucial factors causing the entire collapse of the Dam.