摘要
针对传统方法在重力坝深层抗滑稳定分析中存在的问题,以某实际工程为例,建立重力坝有限元强度折减计算模型,并考虑荷载分项系数和坝基及软弱层的材料分项系数,通过逐步降低材料强度参数,利用ANSYS软件确定大坝关键节点水平位移与坝踵下方软弱层上、下两点位移差随折减系数变化的关系,引入尖点突变理论得到大坝深层抗滑稳定安全裕度为1.29,对重力坝的稳定性进行了判别。
In review of the problem of traditional method in analysis of gravity dam deep anti sliding stability, finite element strength reduction model of gravity dam was established by taking an actual project for an example. Considering load and material partial coefficient of dam foundation and the weak layer, the strength parameters of the materials are reduced by the strength reduction method. ANSYS software was used to determine the change of horizontal displacement of the key nodes of the dam and vertical displacement of weak layer below the dam heel with reduction coefficient. The anti-sliding safe ty margin of the dam is 1.29 obtained by the catastrophe theory. Finally, the gravity dam stability was distinguished.
出处
《水电能源科学》
北大核心
2015年第12期78-80,100,共4页
Water Resources and Power
关键词
重力坝
抗滑稳定
分项系数
突变理论
gravity dam
anti-sliding stability
partial coefficient
catastrophe theory
