NUMERICAL ANALYSIS OF KARKHEH DAM, FOUNDATION, AND ITSCUTOFF WALL SUBJECTED TO EARTHQUAKE LOADING

摘要

A plastic concrete cut-off wall is used for seepage controlling in the foundation of the Karkheh Dam. Thefoundation comprises conglomerate layers with intercalated mudstone layers. This paper presents a twodimensional, stress-strain, finite element analyses of the Karkheh Dam, foundation, and cut-off wall,subjected to a combination of first impounding and earthquake loading. The paper concentrates mostly onthe deformation behavior of the cut-off wall. Stresses and strains within the structure, particularly in thecutoff wall, will be studied in this paper. The analysis indicates that earthquake-induced horizontaldisplacements maximize in upper elevations of the cut-off wall, particularly where it meets the dam core.Also some residual post-earthquake horizontal deformations remain in the upper part of the cut-off wall.