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Nonlinear dynamic analysis of Moshampa Dam Spillway structure and modelling it in finite element software, taking structure soil interaction in to account

Author Affiliations

  • 1Iran, Tehran, Tehran University, Iran
  • 2Iran, Zanjan, Zanjan University, Iran

Res. J. Engineering Sci., Volume 9, Issue (2), Pages 1-12, May,26 (2020)


The region subjected to this study is Qezelozan river basin up where Moshampa dam is located, near Moshampa-ye-Sharqi village. The structure of the spillway is currently placed on the right axis abutment of Moshampa dam. By changing the spillway dimensions and adding to the size of the plunge pool, this study focuses on a new alternative in which the concrete structure of the flip bucket has been shortened and a concave projectile has been added to its end. After hydraulically investigating the idea of remodeling the drain system of Moshampa reservoir applying value engineering, the hydraulic function mechanism of the spillway was changed from flip bucket + stilling bas in model to projectile bucket + plunge pool one. The climatological and geotechnical characteristics of the region including the river basin, its climate, its surface geology, the resistivity and the geotechnical factors of the different kinds of soils or the alluviums existing under and around the spillway structure, the stilling basin and also the concave projectile were studied and the characteristics of the stone wall necessary for the analysis of the soil resistivity under and around the spillway were processed in a computer software .At the first step of this research, the resistivity of the soil existing around and under the spillway and the pool has been analyzed by Praxis software in both static and quasi static modes considering the loads. Next, the model has been given to Finite element analytical software, so that the structure soil interaction could be analyzed in terms of the rules and regulations and its nonlinear dynamic design would be revealed.


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