Passive control method of large elevated liquid-storage tank with outside floating roof

In order to reduce the loss of the large elevated liquid-storage tank in earthquake, this paper introduces the passive control method to the anti-seismic analysis of large elevated liquid-storage tank with outside floating roof by building the finite element model which involves the fluid sloshing and tank bottom uplift with ANSYS. The viscous damper and the frictional damper are installed between the floating roof and rigid wall of the tank, respectively. The numerical results show that the amplitude of fluid sloshing, the vertical compressive stress, the hoop tensile stress and the height of the bottom tank uplift are all reduced by installing dampers. The results also illustrate that the seismic response of the large elevated liquid-storage tank can be effectively reduced by conducting passive control on the system of the tank.