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针对大跨度钢筋混凝土空腹夹层板楼盖结构体系,应用大型有限元分析软件ANSYS对这种新型结构的23个模型进行分析,采用线性有限元法计算。通过研究特征值屈曲分析其静力稳定性能,并分析了空腹夹层板厚度、上下肋高度和表层薄板厚度在不同数值时对结构静力稳定性的影响。分析结果表明,空腹夹层板线性屈曲时以整体失稳为主,稳定性较好。空腹夹层板的厚度、上下肋高度和表层薄板厚度对结构的静力稳定性都有一定的影响,取适当的数值可显著提高结构的特征值屈曲荷载。
Aiming at the structure system of long-span reinforced concrete sandwich panel sandwich panel, 23 models of this new structure were analyzed by using the large-scale finite element analysis software ANSYS, and the linear finite element method was used to calculate. The static stability of the structure is analyzed by studying the eigenvalue buckling, and the influence of the sandwich panel thickness, the height of the upper and lower ribs and the thickness of the surface sheet on the static stability at different values are analyzed. The analysis results show that when the buckling plate is linear buckled, the overall instability is the main factor, and the stability is better. The thickness of the sandwich panel, the height of the upper and lower ribs and the thickness of the superficial sheet have a certain influence on the static stability of the structure. Appropriate values can significantly improve the eigenvalue buckling load of the structure.