Taking foundation soil as porous medium,based on the tank and the liquid storage tank coupling,tank body-foundation-ground interaction,porous medium solid-liquid coupling,a three-dimensional finite element model of shell-liquid-foundation-ground was built,and the stress distribution of tank body and foundation were discussed.The research shows that additional stress range caused by single tank is mainly the 0.3D range of the tank bottom edge outer,in order to eliminate the effect of group tanks,the desirable tank spacing is 0.6D; with the foundation consolidation,tank body stress changes;the radial stress maximum value of tank bottom,the circumferential stress maximum value of tank body reaches the peak when the loading end,but the peak of the radial stress maximum value of tank wall appears lag phenomenon; the radial stress of tank wall at the edge of tank bottom is larger,the maximum circumferential stress of tank wall occurs at about H/3 distance of tank bottom.%将地基土看做多孔介质,考虑罐体与储液相互耦合、罐体-基础-地基之间的相互作用、多孔介质固液相耦合,建立壳-液-基础-地基三维有限元模型,探讨了静荷载作用下罐体及罐基应力分布的特点.结果表明,在荷载作用下,单个储罐所引起的竖向附加应力主要集中在罐底边缘外0.3D范围内,为消除群罐效应的影响,罐距可取0.6D左右;罐体的应力随地基固结的进行不断变化,罐底板的径向应力最大值、罐底板与罐壁板的环向应力最大值在加载结束时达到峰值,罐壁板的径向应力最大值的峰值出现滞后现象;固结结束后,底板边缘处罐壁径向应力较大,罐壁最大环向应力发生在距离罐底约H/3处.
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