Numerical Evaluation of Seismic Behavior of Shallow Tanks Considering the Effect of Interaction

Given the importance of surface water reservoirs and their application in various industries, comprehensive knowledge of the seismic behaviour of these facilities is required. In such structures, due to soil structure interaction and fluid structures, seismic behaviour without the help of software based on the numerical solution is not possible. Therefore, finite element software, Abaqus, is required. In this paper, a three-dimensional model of a solid rectangular surface tank and underlying soil was considered in addition to the effects of SSI and FSI. For a closer examination, the Drucker Prager nonlinear model was used to describe the behaviour of the soil and for modelling the interaction of water and reservoir to the normal behaviour Hard Contact was used; and for soil-structure interaction, Frictionless behaviour, the theory of Columbus, was used. By using sensitivity analysis, the sensitivity for the dynamic interaction parameters was obtained, and then the results were compared with the results of Iranian publication number 123. The results showed that the soil beneath the tank and soil-structure interaction had a great impact on the seismic behaviour of surface reservoirs. Furthermore, the effect of sloshing water was highly dependent on the intensity and frequency of the seismic load. Because the behaviour of water in the high-frequency earthquake is different, the low-frequency response often tends to increase the reservoir's behaviour.