Small Displacement Coupled Analysis of Concrete Gravity Dam Foundations: Static and Dynamic Conditions
详细信息 查看全文
- 作者：Maria Luísa Braga Farinha ; Nuno Monteiro Azevedo…
- 关键词：Gravity dams ; Rock foundations ; Seepage–stress coupled model ; Joint finite elements ; Stability analysis
- 刊名：Rock Mechanics and Rock Engineering
- 出版年：2017
- 出版时间：February 2017
- 年：2017
- 卷：50
- 期：2
- 页码：439-464
- 全文大小：
- 刊物类别：Earth and Environmental Science
- 刊物主题：Geophysics/Geodesy; Civil Engineering;
- 出版者：Springer Vienna
- ISSN：1434-453X
- 卷排序：50
文摘
The explicit formulation of a small displacement model for the coupled hydro-mechanical analysis of concrete gravity dam foundations based on joint finite elements is presented. The proposed coupled model requires a thorough pre-processing stage in order to ensure that the interaction between the various blocks which represent both the rock mass foundation and the dam is always edge to edge. The mechanical part of the model, though limited to small displacements, has the advantage of allowing an accurate representation of the stress distribution along the interfaces, such as rock mass joints. The hydraulic part and the mechanical part of the model are fully compatible. The coupled model is validated using a real case of a dam in operation, by comparison of the results with those obtained with a large displacement discrete model. It is shown that it is possible to assess the sliding stability of concrete gravity dams using small displacement models under both static and dynamic conditions.