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考虑施工过程中焊缝引起的初始缺陷,对圆柱壳进行弹性屈曲分析,研究了不同初始缺陷幅值下圆柱壳的屈曲应力,结果表明施工过程中焊缝收缩引起的圆柱壳环向初始缺陷对圆柱壳的弹性屈曲影响显著,可使屈曲应力降至理想圆柱壳的0.22～0.43倍.根据吸收塔施工验收规程,考虑施工制作过程中产生的几何初始缺陷,对圆柱壳进行了弹塑性屈曲分析,得到了圆柱壳在轴压状态下的受力性能,以及相关的荷载位移曲线,并对比了各规范方法计算结果,给出了建议的稳定承载力设计值.
Considering the initial defects caused by the weld during the construction process, the elastic buckling analysis of the cylindrical shell is carried out. The buckling stress of the cylindrical shell with different initial defects amplitude is studied. The results show that The elastic buckling of the cylindrical shell is significant, which can reduce the buckling stress to 0.22 ~ 0.43 times the ideal cylindrical shell.According to the acceptance rules of the absorption tower construction, considering the initial geometric imperfections in the construction process, the elastoplastic buckling analysis , The force performance of cylindrical shell under axial compression and the relevant load displacement curves were obtained. The calculated results of each standard method were compared, and the proposed design values of stable bearing capacity were given.