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通过对拱顶储罐罐壁承受轴向载荷、初始几何缺陷及轴压失稳状况研究，指 出在固定顶罐设计、建造和运行各阶段都应进行罐壁轴压稳定性校核. 根据圆柱薄壳稳定性 理论和轴压失稳临界应力数值分析计算结果，提出固定顶罐罐壁轴压稳定性校核方法和数学 模型，并运用回归分析方法建立罐壁轴压失稳临界应力计算公式. 对几种常用规格的拱顶罐 有初始挠度缺陷罐壁轴压稳定性分析表明：随储罐容积和罐壁初始挠度增大，罐壁轴压稳定 性呈减弱趋势.

ANALYSIS AND CALCULATION METHODS FOR BUCKLING STRENGTH OF DOME-ROOF TANK SHELLS WITH IMPERFECTIONS UNDER AXIAL COMPRESSION

The study on the dome-roof tank shells with imperfections under the axial compressive and buckling loads shows that the buckling strength of fixed-roof tank shells should be checked during its design and construction stages as well as during the service stage. Based on the stability theory and the numerical analysis of critical buckling strength for cylindrical shell subjected to axially compressive loads, a checking computation method and its mathematical model are established, and then the formula for calculating the buckling loads are obtained by regression analysis. The stability of tanks of several typical sizes with initial geometric imperfections is also studied, and the buckling strength of the tank shells under axial compression is decreased with their volume and shell's increasing initial deflection.