Simplified mechanical model for seismic design of horizontal storage tank considering soil-tank-liquid interaction

Based on potential fluid theory and soil model theory, this paper derived a simplified mechanical model for horizontal storage tanks considering soil-tank-liquid interaction (STLI), which can be used for seismic design of horizontal storage tanks. Then the paper studied the ground motion response of STLI and Non-STLI under different shear wave velocity. We find the seismic response of the horizontal storage tank is more severe after considering the STLI, and the main control targets such as the base shear force, overturning bending moment and sloshing wave height increase by 25%~58%. Moreover, the effects of soft and medium soft fields are more significant.