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Morteza Sohrabi Gilani
Assistant Professor, Department of Civil Engineering, University of Guilan, Rasht, Iran.
Civil Engineering, Building, Construction & Architecture

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A Comparative Study between Pseudo-static and Dynamic Analyses on Rock Wedge Stability of an Arch Dam Hasan Mostafaei; Morteza Sohrabi Gilani; Mohsen Ghaemian
Civil Engineering Journal Vol 4, No 1 (2018): January
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (856.211 KB) | DOI: 10.28991/cej-030977

Abstract

In this study, the abutment stability of arch dams for two cases of pseudo-static and dynamic methods were compared based on limit state equilibrium method. For the pseudo-static approach, unit accelerations were applied to the model in three directions for calculating thrust forces. For dynamic analysis, three components of ground acceleration time histories of Kobe earthquake, 1979 were applied to the finite element model of dam-foundation-reservoir, and the thrust forces were obtained. The effect of reduction factors in pseudo-static analysis is investigated in order to obtain the reduction factor that corresponds to wedge movement in dynamic analysis. For this purpose, the reduction factors have been increased from 0.5 to 1. The obtained results indicate that pseudo-static results are more conservative than the dynamic analysis method for small reduction factors and the reduction factor plays a key role on the abutment stability analysis.
Co-Authors Hasan Mostafaei Mohsen Ghaemian