Safety Assessment of an Existing Concrete Gravity Dam

by Romeo B. Baylosis, Tennessee Valley Authority, United States,
Richard M. Bennett, Tennessee Valley Authority, United States,

Document Type: Proceeding Paper

Part of: Structural Safety and Reliability


The safety and/or probability of failure of an existing 146 m high concrete gravity dam subjected to normal static and dynamic loads is evaluated. Three modes of failure were considered, namely, sliding, overturning, and overstressing. Two reservoir levels were considered: one with the reservoir level being a random variable, and the other with the reservoir level being a deterministic value corresponding to flood level. A suite of thirty-nine actual earthquake acceleration time history records were used for the dynamic input. A thermal analysis was also conducted based on measured temperature readings. The results indicated that the critical modes of failure are overturning and overstressing during an earthquake. The study describes a probabilistic generalized methodology of quantifying the uncertainties of input random variables and performing a probabilistic risk assessment.

Subject Headings: Concrete dams | Gravity dams | Dam safety | Dam failures | Gravity loads | Risk management | Probability | Reservoirs

Services: Buy this book/Buy this article


Return to search