Investigation of Hydrodynamic Effects on Linear and Nonlinear Earthquake Responses of Arch Dams by the Lagrangian Approach

Authors: MEHMET AKKÖSE, A. AYDIN DUMANOĞLU, M. EMİN TUNA

Abstract: The linear and nonlinear responses of a selected arch dam subjected to earthquake ground motion are presented in this study. The hydrodynamic effects on the dynamic response of arch dams are investigated using step-by-step integration by the Lagrangian approach. The foundation flexibility effects on dam response are also examined. Water in the reservoir was represented by 8-noded Lagrangian fluid finite elements. The element including compressible behavior and surface sloshing motion of the fluid has been coded and incorporated into a general-purpose computer program, NONSAP. In this study, the curve description method describes the nonlinear behavior of the dam concrete. The El-Centro N-S component of the Imperial Valley earthquake, on May 18, 1940, has been used as the ground motion. The response of the dam was characterized by crest displacements and envelopes of maximum tensile stresses.

Keywords: Hydrodynamic effect, Dam-water-foundation interaction, Linear and nonlinear analysis, Curve description method, Earthquake responses

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