季节性冻土层对立式储罐地震反应的影响

Influence of seasonally frozen ground on the seismic response of tanks

冬季的季节性冻土层改变了地基土的动力特性和场地的卓越周期,季节性冻土层上储罐的地震反应必然受到季节性冻土层的影响。本文以Ⅲ类场地上的八种立式储罐为研究对象,计算了场地在非冻结期和冻结期两种情况下储罐的地震反应,并对计算结果进行了比较。结果表明Ⅲ类场地上的储罐,冻结期的地震反应要比非冻结期的地震反应明显增大。

In winter,seasonally frozen ground changes the dynamic properties of foundation soil and the predomi- nant periods of soil sites,then the seismic response of tanks on the seasonally frozen ground will be influenced.In this paper,we study eight kinds of liquid-storage steel tanks on the third kind of soil site,compute the seismic re- sponses of the tanks on the sites with or without the frozen layer and compare both of the computing results.The re- sults indicate that the seismic response of the tanks on the site with the frozen layer is much larger than that of the tanks on the site without the frozen layer.