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为了比较钢-混凝土组合空腹夹层板3种常用的有限元模型的计算结果,建立了考虑材料非线性的壳-实体精细化模型和两种梁-壳混合模型。以30块精细化程度不同的正交正放钢-混凝土组合空腹夹层板数值模型为例,并考虑剪力键节点尺寸及表层混凝土板厚的变化进行有限元参数化分析。找出了简化数值模型和精细化数值模型对于竖向挠度、自振频率等计算结果的差别,并提出了基于结构层次和构件层次的修正方法。在工程数值分析中,想要得到更好的精度,应采用精细化的有限元模型,或对简化数值模型结果进行修正。
In order to compare the results of three commonly used finite element models of steel-concrete sandwich panels, a shell-solid refinement model and two beam-shell hybrid models considering material nonlinearity were established. In this paper, 30 numerical models of orthogonal steel-concrete composite slab sandwich panels with different degree of refinement are taken as an example. The parametric analysis of finite element method is carried out with the consideration of the size of shear bond nodes and the change of surface concrete slab thickness. The differences between the simplified numerical model and the refined numerical model for the calculation results of vertical deflection and natural frequency are found out, and the correction method based on the structural level and component level is proposed. In engineering numerical analysis, to get better accuracy, a refined finite element model should be used, or a simplified numerical model should be modified.