考虑流固耦合作用的高土石坝动力分析

吴永康; 王翔南; 董威信; 于玉贞

doi:10.11779/CJGE201511010

考虑流固耦合作用的高土石坝动力分析 English Version

清华大学水沙科学与水利水电工程国家重点实验室,北京 100084

基金项目: 国家自然科学基金项目（51379103,51179092）; 国家重点实验室项目（2013-KY-4）

详细信息

作者简介:
吴永康(1988- ),男,博士研究生,主要从事高土石坝数值分析方面的工作。E-mail: wuyongkang888@163.com。

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- 文章访问数: 403
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- PDF下载量: 386
出版历程
- 收稿日期: 2014-09-07
- 发布日期: 2015-11-19

Dynamic analyses of a high earth-rockfill dam considering effects of solid-fluid coupling

State Key Laboratory of Hydroscience and Engineering, Department of Hydraulic Engineering, Tsinghua University, Beijing 100084, China

摘要

摘要: 在土石坝施工、蓄水和遭遇地震时,流固耦合作用对土石坝的静动力响应有重要影响,应在计算分析中有所考虑。以糯扎渡高心墙堆石坝为例,选用莫尔-库仑弹塑性模型来描述坝料的力学性质,并采用流固耦合的方法对该坝进行了静动力分析。静力分析中模拟了大坝施工和蓄水过程,然后基于静力分析得到的初始应力场,采用完全耦合的非线性方法研究了大坝的地震动力响应。该分析方法能够更为合理准确地描述土石坝在地震动作用下残余变形的发展及超静孔压的累积和消散过程。计算结果表明：超静孔隙水压力随地震过程逐渐累积,最大值出现在心墙的底部;由于鞭梢效应,加速度放大系数在坝顶处达到最大;水平和竖直方向的永久变形同样都是在坝顶处达到最大值。
- 流固耦合 /
- 土石坝 /
- 动力分析 /
- 初始应力场 /
- 施工 /
- 蓄水
Abstract: In the process of construction, impounding or action of earthquake, the solid-fluid coupling has a significant influence on the static and dynamic responses of earth-rockfill dams, which should be considered in the seismic analysis. Taking the Nuozhadu high earth-rockfill dam as an example, static and seismic analyses are conducted by using the solid-fluid coupling method. The Mohr-Coulomb elasto-plastic model is employed to describe the mechanical properties of dam materials. The construction of the dam and the impounding of the reservoir are simulated in the static analysis, then on the basis of the static stress field, the dynamic response of the dam during an earthquake is investigated using the fully-coupled nonlinear method. The evolution of residual deformations and the accumulation and dissipation of excess pore water pressure can be calculated more reasonably. The results show that the excess pore water pressure accumulates gradually with earthquake, and the maximum value occurs at the bottom of core. The acceleration amplification reaches the maximum at the crest as a result of whiplash effect. The horizontal and vertical permanent displacements both reach the maximum values at the dam crest.
- solid-fluid coupling /
- earth-rockfill dam /
- dynamic analysis /
- initial stress field /
- construction /
- impoundment

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参考文献(18)

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文章访问数: 403
HTML全文浏览量: 7
PDF下载量: 386
被引次数: 0

考虑流固耦合作用的高土石坝动力分析 English Version

作者简介: 吴永康(1988- ),男,博士研究生,主要从事高土石坝数值分析方面的工作。E-mail: wuyongkang888@163.com。

计量

出版历程

Dynamic analyses of a high earth-rockfill dam considering effects of solid-fluid coupling

计量

出版历程

目录

作者简介:
吴永康(1988- ),男,博士研究生,主要从事高土石坝数值分析方面的工作。E-mail: wuyongkang888@163.com。