立式储罐橡胶隔震工程应用设计研究

The Application Investigation of Rubber to Seismic Isolation Engineering Design of Standing Tanks

针对立式储罐的工程应用,给出了立式储罐的隔震基础设计的构造及要求,并将储罐作为单质点体系,建立了与规范相对应的储罐抗震设计反应谱法.考虑隔震频率在一定范围内对储罐晃动波高有一定的影响,给出了隔震设计的波高修正系数.考虑反应谱阻尼比与实际阻尼比之间的差异,给出了阻尼修正方法.针对工程中常用的浮顶罐,进行了计算分析,并与文献[1]的结果进行了比较,表明所给出的结果能够满足工程要求.

Based on the engineering application of standing tanks, conformation and demands of the seismic isolation foundation design of tanks are figured out and the response spectral method of tanks corresponding to the codes by considering the tank as a singlemass system is set up in this paper. Because the seismic isolation frequency will affect the rocking wave height in some degree, the revising parameter on the base of a lot of numerical analysis and investigations is obtained. Because the damping ratio of the general design response spectrum is 0.05, rocking damping ratio of the liquid surface is 0.005, the liquid - structure coupling ratio is 0.05, the damping ratio of seismic isolation is from 0. 10 to 0.30, apparently using the damping ratio of 0.05 will make the calculating reactions on the high side, so the revising parameters are obtained on the base of the differences. Calculations and analysis are went alone with for the floating - head tanks in common use and compared with paper , the computing resuits indicate that the results of this paper meet the engineering demands.