Abstract
The isolation storage tank with 20000m3 responded to seismic is calculated by using the finite element analysis (FEA) program ANSYS, and horizontal displacement harmonic excitation is considered for investigation of the relative displacement of tank wall, liquid sloshing wave height, and the stress of tank wall. The analysis show that, with isolation, the maximal relative displacement, the maximal liquid sloshing wave height, and the maximal stress of tank wall are reduced obviously compared with tank that without isolation, and as site become soft, the maximal relative displacement of the tank wall at the top and the maximal wave height increase gradually, but the maximal stress of tank wall change little.
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