Dynamic Response of Rectangular RC Liquid Storage Structures Considering Liquid-Structure Interaction

Abstract eng:
This paper presents a dynamic simulation for rectangular reinforced concrete (RC) liquid storage tank structure taking liquid-structure interaction into account. A finite element approach is employed for the simulation of rectangular RC liquid storage tank making use of software ADINA, and the actions of reinforcement is considered using the element Rebar provided in the software, which is embedded in concrete materials in the finite element analysis. The effects of the surface gravity waves of the liquid, the stiffness of the wall panels of the tank and the shapes of the tanks on the dynamic response are discussed respectively considering liquid-structure interaction. The dynamic responses of the tank are also investigated for the cases of the action of the unidirectional, bidirectional and three-directional coupled seismic excitations, respectively. The study results indicate that the effect of the surface gravity waves on the dynamic response of the tank storage structures is not negligible for the dynamic analysis with liquid-structure interaction, while the dynamic pressure of the liquids is sensitive to the change of the stiffness of the wall panels of the tank, and the effect of the surface gravity waves on the dynamic response of the shallow liquid storage structures is much more significant than that of the deep ones. For the purpose of engineering designs, the effect of the stiffness of the wall panels on the dynamic response of the tank structures can be negligible, and the analysis by the action of unidirectional seismic action is sufficiently accurate.

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