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对轴力作用下钢制网壳盖板节点承载力进行了有限元分析,并通过盖板节点足尺试验验证有限元分析的正确性.改变有限元模型参数,计算数十个模型,基于分析结果得出轴力作用下钢制盖板节点的破坏模式.结果表明,盖板节点破坏模式有螺栓群抗剪破坏及盖板中心区域屈曲破坏两种.对结果数据进行拟合,得出钢制盖板节点在轴力作用下承载力计算公式.轴力作用下钢制盖板的极限承载力主要与螺栓的直径与数量、盖板的厚度和直径等因素有关,极限承载力由两种破坏模式所对应承载力的较小值确定.
The finite element analysis of the bearing capacity of the steel net shell cover with axial force was carried out and the correctness of the finite element analysis was verified by the full-scale test of the cover plate.According to the analysis of the finite element model parameters and the calculation of dozens of models, The results show that the failure mode of the steel plate joints under the axial force is obtained.The results show that there are two kinds of failure modes of the plate joints: the shearing failure of the bolt group and the buckling failure in the central region of the cover plate.Fitting the result data, The calculation formula of bearing capacity under the action of axial force of the cover-plate joints The ultimate bearing capacity of the steel cover under the axial force is mainly related to the diameter and number of the bolts, the thickness and diameter of the cover, etc. The ultimate bearing capacity consists of two kinds Destruction mode corresponding to the smaller bearing capacity to determine.