Dynamic Analysis of Earth Dams under De-Noised Earthquake Records

Document Type : Research Article

Authors

1 Department of Civil Engineering, Shahrekord University, Shahrekord, Iran.

2 Assistant Professor, Department of Civil Engineering, Shahrekord University, Shahrekord, Iran.

Abstract

In this study, the dynamic behavior of earth dams with clay core was analyzed using the finite element method. The seismic responses of earth dams under main and wavelet-based decomposed earthquake records were investigated. Earthquake records were decomposed up to five stages by using the wavelet de-noising method. The ratio of acceleration response spectrum to maximum acceleration, ratio of velocity response spectrum to maximum velocity, ratio of displacement response spectrum to maximum displacement, Fourier amplitude spectrum and time history of Arias intensity of earth dam crest under main and wavelet-based decomposed earthquake records were analyzed. The results demonstrated that the acceleration response spectrum ratio of dam crest under de-noised records up to 3rd level and the velocity and displacement spectrum ratios of dam crest up to 4th level has an acceptable accuracy in comparison to the responses under main earthquake records. Results of the dynamic analysis indicated that Fourier amplitude spectra and Arias intensity of earth dam crest under de-noising based records up to 4th level are compatible with main earthquake records. The results also showed that the wavelet-based decomposed earthquake records can be a reliable alternative for main earthquake records in the dynamic analysis of earth dams.

Keywords

Main Subjects

References

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Amirkabir Journal of Civil Engineering
Volume 53, Issue 7
October 2021
Pages 3101-3114

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