基础隔震高举架储油罐地震反应分析

Seismic Response of Base Isolation Highly-elevated Oil Storage Tanks

为减小高举架储油罐的地震反应，在高举架储油罐支架底设置基础隔震橡胶垫，建立考虑刚性脉冲质量、对流质量、液固耦合质量的三质点无控及基底隔震体系简化分析模型，进行了不同容积体型的高举架储油罐有控、无控情况下的地震反应时程分析，分析了高举架储油罐隔震频率对减震效果的影响。研究结果表明：隔震层上部的结构近似为平动，隔震频率的理想区段可取为0．5rad／s≤ω≤4rad／s，隔震高举架储油罐基底剪力降低60．88％～95．02％，减震效果明显，储罐容积越小隔震效果越好。

In order to reduce the seismic response, a rubber pillow for base isolation is set on the bottom of the bracket of highly- elevated oil storage tank. The simplified model for the base isolation system with three-particle uncontrolled is given, considering the rigid impulse convection and liquid-solid coupling mass. The analysis of the seismic response of highly-elevated oil storage tank of different dimensions was made under the controlled and uncontrolled circumstances, and the influence of the base isolation frequency of highly-elevated oil storage tank on the earthquake mitigation is analyzed. The research indicates that the horizontal motion happens on the upside of the base isolation, and the ideal base isolation frequency is 0. 5 rad/s ≤ω≤4 rad/s. The base shearing force of the highly-elevated oil storage tank increased by 60.88% - 95.02%. The less of the tank cubage is, the better of the base isolation effect is.