Abstract: The traditional buried single-layer steel oil tank is exposed to the internal and external corrosive environment for a long time, which is easy to leak and pollute the soil and groundwater. The double-layer FF (Fiber Reinforced Plastics- Fiber Reinforced Plastics) and SF (Steel-Fiber Reinforced Plastics) storage tanks have good corrosion resistance and low cost. The material strength can meet the requirements of use, and hasbetter safety performance than single-layer steel storage tanks. The numerical calculation model for buried FF and SF double-layer oil storage tanks was established,considering the viscoelastic boundary and fluid-solid coupling. The seismic response of buried FF and SF double-layer oil storage tanks was studied, and the influence of parameters was analyzed. The results show that the dynamic response of the tank under liquid filling condition is obviously larger than that without liquid filling condition. The dynamic response of the system under near-field earthquake is larger than that under far-field earthquake. The dynamic action of oil storage tank increases with the increase size of body shape. In this paper, it is found that the dynamic response of FF and SF storage tanks is similar in model analysis and practical application, and both of them have a good application prospect, good economy and practicability in future engineering practice.

Key words: buried type, double layer oil storage tank, soil structure interaction, FSI, dynamic response