摘要
针对董箐混凝土面板堆石坝的抗震安全性要求,采用三维非线性动力有限元方法,考虑堆石料的动力非线性及地震时坝体动水压力作用,采用等效线性模型求解坝体的地震反应,获得了该坝在EI-Centro地震波作用下及峰值加速度时坝体和面板的加速度反应、位移反应、应力反应、垂直缝与周边缝位移反应及坝体地震残余变形等地震动力反应特性,揭示了董箐面板堆石坝的地震反应规律与特点,分析了坝体的抗震安全性,论证了设计方案的合理性。
In view of seismic safety requirements of Dongqing concrete facing rock-fill dam, 3D dynamic nonlinear FEM is applied to study the seismic response behavior of Donqing concrete facing rock-fill dam. The non-linear dynamic properties of rockfill materials and the interaction of water and dam under earthquake are considered. The equivalent line- ar method is used to solve the problem of seismic response of concrete facing rock-fill dam. The dynamic response proper- ties of the dam are obtained in the conditions of EI-Centro seismic wave and peak acceleration of input earthquake curve, such as acceleration response, displacement response and stresses response of rock-fill dam body and its concrete face, displacement response of its peripheral joints and slab joints, and earthquake-induced permanent deformation of the dam. The general law and characteristics of seismic response is put forward for Dongqing concrete facing rock-fill dam. The an- ti-seismic safety of the dam body is analyzed. The conclusion of the design scheme is proved to be reasonable.
出处
《水电能源科学》
北大核心
2012年第1期62-65,共4页
Water Resources and Power
关键词
水工结构
地震响应
三维有限元
董箐混凝土面板堆石坝
hydraulic structure
seismic response
3D finite element method
Dongqing concrete facing rock-fill dam
