论文部分内容阅读
为研究坝基倾向下游的缓倾角软弱结构面的稳定问题,采用有限元强度折减法,建立了重力坝坝趾夹层处上下两点的相对位移与强度折减系数尖点突变模型,并通过建立模型的标准势函数来比较其判别式与零的大小关系,进而判断重力坝是否失稳。实例应用结果表明,以此模型为失稳判据可以体现重力坝失稳过程的突变性,同时能够将安全系数量化到一个客观具体的数值。
In order to study the stability of gently inclined weak structural plane downstream of the dam foundation, finite element strength reduction method was used to establish a cusp catastrophe model of relative displacement and strength reduction coefficient at the top and bottom of the toe sandwich of gravity dam. By establishing a model The standard potential function to compare the size of its discriminant and zero, and then determine whether the gravity dam instability. The practical application shows that the model can be used as the instability criterion to show the catastrophic instability of gravity dam and to quantify the safety factor to an objective and specific value.