人民黄河Issue(7)：103-105,3.DOI:10.3969/j.issn.1000-1379.2014.07.031
不同河谷条件面板堆石坝地震加速度反应规律
Research on Distribution of Horizontal Acceleration of Concrete Faced Rockfill Dam Under Different Conditions of River Valley
宋志宇 1董莉莉 1李斌1
作者信息
- 1. 黄河勘测规划设计有限公司，河南 郑州 450003
- 折叠
摘要
Abstract
In order to find the distribution patterns of dynamic acceleration for dams subjected to earthquake,3D seismic responses of concrete-faced rockfill dams with different heights,different widths of river valley and different bank slopes were analyzed by using equivalent-linear model. The acceleration distribution along the dam axis at the top of the dam was mainly analyzed. The results show that if dam height is about 200 m,the position of the maximum acceleration is on the middle of river valley at the top;if dam height is higher(about 300 m),the position and distribution of the maximum acceleration is generally not affected by the conditions of river valley;To lower dam(100 m)and wider valleys( ﹥ 50 m),the po-sition of the maximum acceleration on the axis of the top moves from the middle valley to the riversides. So if 2-D dynamical computation for wide valleys is used to compute the seismic response. It concludes that the maximum acceleration value and its occurring position cannot be correctly got. So it should take 3-D dynamical computation for concrete-faced rockfill dams.关键词
面板堆石坝/动力分析/河谷条件/加速度分布Key words
faced rockfill dams/seismic response analysis/conditions of river valley/distribution patterns of dynamic acceleration分类
建筑与水利引用本文复制引用
宋志宇,董莉莉,李斌..不同河谷条件面板堆石坝地震加速度反应规律[J].人民黄河,2014,(7):103-105,3.
