NEHRP Clearinghouse
- Title
- Earthquake Analysis and Response of Concrete Gravity Dams.
- File
- PB85193902.pdf
- Author(s)
- Fenves, G.; Chopra, A. K.
- Source
- National Science Foundation, Washington, DC., August 1984, 240 p.
- Identifying Number(s)
- UCB/EERC-84/10
- Abstract
- First the reservoir bottom materials are modelled approximately by a reservoir bottom that partially absorbs incident hydro-dynamic pressure waves. A general analytical procedure is then developed to compute the response of concrete gravity dams to arbitrary earthquake ground motion including the simultaneous effects of dam-water interaction, dam-foundation rock interaction and reservoir bottom absorption. Finally, a simplified analytical procedure suitable for the preliminary design and safety evaluation of concrete gravity dams is developed. The simplified procedure includes the more important factors influencing the earthquake response of dams. An equivalent single-degree-of-freedom system is developed that approximately represents the fundamental mode response of concrete gravity dams on flexible foundation rock with impounded water and absorptive reservoir bottom materials due to horizontal earthquake ground motion. The equivalent SDF system can then be used in a response spectrum earthquake analysis of the dam.
- Keywords
- Energy absorption; Design; Seismic waves; Alluvium; Gravity dams; Concrete dams; Reservoirs; Earthquake engineering; Safety; Soil dynamics; Sediments; Foundations; Rocks; Earthquakes; Dynamic structural analysis