Earthquake analysis of concrete gravity dams including reservoir bottom absorption and dam-water-foundation rock interaction.
Earthquake analysis of concrete gravity dams including reservoir bottom absorption and dam-water-foundation rock interaction.
复制标题
DOI：
10.1002/eqe.4290120507
复制
发表时间：
1984
影响因子：
4.5
通讯作者：
G. Fenves;A. Chopra
中科院分区：
文献类型：
--
作者：
G. Fenves;A. Chopra
本文将现有的混凝土重力坝地震分析的子结构法（包括蓄水和柔性基岩的动力效应）推广到实际水库底部冲积层和沉积物的影响。近似模拟的水库底部，部分吸收入射的流体动力压力波，这些影响被纳入流体动力压力的连续性解决方案。将坝-水-基岩系统理想化为二维系统，并在线性行为假设下进行分析。一个例子的地震分析，以证明从分析过程中得到的结果。几种情况下的计算时间说明了分析方法的效率。特别是，所需的额外的计算时间，包括水库底部吸收显示是非常小的。
The available substructure method for the earthquake analysis of concrete gravity dams, including the dynamic effects of the impounded water and the flexible foundation rock, is extended to include the effects of alluvium and sediments invariably present at the bottom of actual reservoirs. Modelled approximately by a reservoir bottom that partially absorbs incident hydrodynamic pressure waves, these effects are incorporated into the continuum solution for the hydrodynamic pressure. The dam-water-foundation rock system is idealized as a two-dimensional system and analysed under the assumption of linear behaviour. An example earthquake analysis is presented to demonstrate the results obtained from the analytical procedure. Computation times for several cases illustrate the efficiency of the analytical procedure. In particular, the additional computation time required to include reservoir bottom absorption is shown to be very small.