中文摘要：

建造在软土地基上的大型钢储罐易产生各种沉降变形，其中罐周不均匀沉降的影响最为不利。在各类大型储罐沉降变形的大量实测数据基础上，利用傅立叶分解分析罐周不均匀沉降的组成及特点，利用分析得到的谐波沉降对储罐结构进行有限元分析。分析表明，储罐在不均匀沉降下的应力和变形均与其几何参数有关，因此目前基于工程经验且与储罐参数无关的地基变形允许值控制标准，从结构的角度看不尽合理。

英文摘要：

Large steel storage tanks constructed in soft foundations are susceptible to various types of settlement deflections, and the differential settlement beneath the tank wall leads to the most serious consequence for the tank. Based on a great deal of measured data for the settlements of various types of in-site large tanks, the composition and characteristics of the differential settlement beneath the tank wall are analyzed using Fourier decomposition. The derived harmonic settlements are then introduced in finite element analyses of the tank structure. It has been shown that the stresses and deformations in the tank under differential settlements are dependent on its geometric parameters. Thus current empirical criteria for allowable deformation of foundation that is independent of geometric parameters seems unreasonable viewed from the structural perspective.