古田溪三级平板支墩坝动抗滑稳定分析

Seismic sliding stability analysis of a flat slab buttress dam

采用三维非线性有限元法研究古田溪三级平板支墩坝动抗滑稳定性． 模拟了建基面的接触非线性， 混凝土、岩石假定为线弹性， 采用无限元模拟水体、岩基的无限域， 用静力分析法进行抗滑稳定分析， 研制了相应的有限元程序． 利用该程序计算了古田溪三级平板支墩坝在纵向地震作用下的抗滑稳定系数随时间变化情况．本文的方法也适用于岩基上混凝土重力坝的动抗滑稳定分析．

Seismic sliding stability of the Gutianxi third cascade buttress dam is studied with 3\|D non\|linear FEM in this paper. The contact non\|linearity between the dam and its foundation is simulated. The rock and concrete are assumed to be linearly elastic and the infinite area of water body and foundation are simulated with infinite elements. The sliding factor is obtained with static analysis method and the relevant FEM program is developed. By using this program, the variation of sliding factor of the dam with time under longitudinal earthquake motion is attained.