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Comparison of Ideal-Coupled and Decoupled Methods in Dynamic Analysis of Gravity Dams
Major Topic: Soil-Fluid-Structure Interaction|اندرکنش خاک-سیال- سازه
Abstract
This paper aims to take advantage of the decoupled and ideal-coupled method in dynamic analysis of gravity dams. In this way, the capability of these methods is compared. The analysis is conducted in frequency domain, and the responses are transformed into the time domain with the help of Fourier transform. Note that; the ideal-coupled approach has not been applied in the analysis of gravity dams. The finite element formulation of dam-reservoir systems results in unsymmetric eigenvalue problem, when pressure and displacements are the water and the dam unknowns, correspondingly. It should be highlighted that the unsymmetric eigensolvers are usually very time-consuming from execution point of view, and also complicated from programming point of view. The aforesaid schemes were developed to symmetrize this eigenvalue problem required to be solved in frequency-domain analysis.
Keywords
Concrete gravity dam; Decoupled method; Ideal-coupled method; Dynamic analysis