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Abstract: In order to study the damping effect of viscoelastic damper attached to the bottom of a spherical tank, the seismic simplified mechanical model considering the sloshing effect, the initial and further simplified mechanical model with viscoelastic dampers at the bottom of the tank are deduced respectively, and the corresponding seismic response analyses were carried out. The results show that the viscoelastic dampers can greatly reduce the force of the support of the spherical tank and the sloshing wave height of the reservoir. Moreover, the calculation results of the finite element model show that the additional viscoelastic dampers at the bottom of the tank can effectively reduce the seismic response. By comparison, the finite element calculation results and the numerical solutions are very close to each other, verifying the accuracy of the calculation results. When the simplified mechanical model is applied to seismic design, the results of the initial simplified model and the further simplified model should be properly amplified. For the purpose of structural safety, the amplification factor could be considered to be 1.1~1.2.
Key words: antiseismic; spherical tank; viscoelastic dampers; ground motion response; simplified mechanics model
作者簡介: 吕 远(1990—),男,博士研究生。电话: 13704266093; E-mail: m13704266093@163.com
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