Zhao Caiqi, Zheng Weidong, Ma Jun, Zhao Yangjian
Key Laboratory of Concrete and Prestressed Concrete Structure, Ministry of Education, School of Civil Engineering, Southeast University, Nanjing 210096, China.
Materials (Basel). 2016 Jun 3;9(6):444. doi: 10.3390/ma9060444.
To solve the problem of critical buckling in the structural analysis and design of the new long-span hollow core roof architecture proposed in this paper (referred to as a "honeycomb panel structural system" (HSSS)), lateral compression tests and finite element analyses were employed in this study to examine the lateral compressive buckling performance of this new type of honeycomb panel with different length-to-thickness ratios. The results led to two main conclusions: (1) Under the experimental conditions that were used, honeycomb panels with the same planar dimensions but different thicknesses had the same compressive stiffness immediately before buckling, while the lateral compressive buckling load-bearing capacity initially increased rapidly with an increasing honeycomb core thickness and then approached the same limiting value; (2) The compressive stiffnesses of test pieces with the same thickness but different lengths were different, while the maximum lateral compressive buckling loads were very similar. Overall instability failure is prone to occur in long and flexible honeycomb panels. In addition, the errors between the lateral compressive buckling loads from the experiment and the finite element simulations are within 6%, which demonstrates the effectiveness of the nonlinear finite element analysis and provides a theoretical basis for future analysis and design for this new type of spatial structure.
为解决本文提出的新型大跨空腹屋盖结构（以下简称“蜂窝板结构体系”，HSSS）结构分析与设计中的临界屈曲问题，本研究通过侧向压缩试验和有限元分析，研究了不同长厚比的新型蜂窝板的侧向压缩屈曲性能。结果得出两个主要结论：（1）在所采用的试验条件下，平面尺寸相同但厚度不同的蜂窝板在屈曲前具有相同的抗压刚度，而侧向压缩屈曲承载能力最初随蜂窝芯厚度的增加而迅速增加，然后接近相同的极限值；（2）厚度相同但长度不同的试件的抗压刚度不同，而最大侧向压缩屈曲载荷非常相似。长而柔性的蜂窝板容易发生整体失稳破坏。此外，试验得到的侧向压缩屈曲载荷与有限元模拟结果之间的误差在6%以内，这证明了非线性有限元分析的有效性，并为今后这种新型空间结构的分析与设计提供了理论依据。
