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Impulsive and Convective Effect on Tanks Resting on Firm Ground

Author(s):

Pankaj Malviya , RKDF(IST) BHOPAL; Lucky Sahu, RKDF(IST) BHOPAL; Dr. Pankaj Singh, RKDF(IST) BHOPAL

Keywords:

Hydrodynamic Effect, Convective and Impulsive, Rectangular Tanks, Finite Element Models, Staad-Pro

Abstract

This study is an examination of an ideal reinforced concrete rectangular water tank resting on ground under the effect of earthquake (lateral) forces. A linear three-dimensional finite element analysis on Staad pro software have been used to analyse the tank response. The variable analysis parameters considered are the aspect ratio (tank height to length ratio) and tank water level, while the tank wall thickness is taken as a constant. Hydrodynamic forces exerted by liquid on tank wall shall be considered in the analysis in addition to hydrostatic forces. These hydrodynamic forces are calculated with the help of spring-mass model of tanks. When a tank containing liquid vibrates, the liquid exerts impulsive and convective hydrodynamic pressure on the tank wall and the tank base in addition to the hydrostatic pressure. In order to show the effect of hydro-dynamic pressure in the analysis, tank can be idealized by an equivalent spring-mass model, which includes the effect of tank wall-liquid interaction. The parameters of this model depend on geometry of the tank. In general, the results show that, there is a smooth increase in the moment and displacement of both hydrostatic and hydrodynamic analysis with a decrease in aspect ratio. The top displacement and moment for the hydrodynamic effects are greater than the hydrostatic results and it is observed that the maximum hydrodynamic moment is higher than the corresponding maximum hydrostatic moment. Likewise, the displacement obtained from hydrodynamic analysis is more than the corresponding hydrostatic value.

Other Details

Paper ID: IJSRDV6I30459
Published in: Volume : 6, Issue : 3
Publication Date: 01/06/2018
Page(s): 699-701

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