多开口甲板板架结构极限承载力实验研究

周红昌; 孔祥韶; 袁天; 吴卫国

doi:10.19693/j.issn.1673-3185.01275

多开口甲板板架结构极限承载力实验研究

Experimental study on the ultimate bearing capacity of deck grillage structure with multiple openings

摘要

摘要:
目的为了研究多开口结构形式对甲板板架结构极限承载能力的影响，
方法以2种不同开口形式的双层板架模型为研究对象，对其在轴向压缩载荷作用下的极限承载能力进行实验研究，对比分析双开口甲板结构和舷侧开口板架结构的失稳破坏模式及极限承载能力，得到多开口甲板板架结构在逐步崩溃过程中甲板各处应力的变化规律。
结果实验结果表明：开口角隅处应力集中现象明显，随着轴向压缩载荷逐渐增大，开口中部甲板应力急剧上升，多开口结构最终均在最大开口的中部发生失稳破坏；甲板开口尺寸对结构初始轴向刚度的影响显著，舷侧开口结构则在弹塑性变形阶段对极限承载力的影响占主导地位。
结论所提实验研究方法及结果可为此类甲板结构的设计提供参考。

Abstract:
Objectives In order to study the impact of the multi-opening structure on the ultimate bearing capacity of deck grillage structure,
Methods the ultimate bearing capacity of the double deck frame model with two different opening types was studied experimentally under the uniaxial compression load. This paper identified the stress change pattern of deck grillage with multiple openings, by analyzing the buckling failure mode and ultimate bearing capacity of double-opening deck structure and broadside opening structure in the process of gradual collapse.
Results The experiment results show that the stress concentration is obvious at the corner of the opening. With the gradual increase of axial compression load, the stress of the middle deck of the opening increases sharply, and the multi-opening structure eventually suffers buckling failure in the middle of the biggest opening. The deck opening size has a significant impact on the initial axial stiffness of the structure, while the side opening structure has a dominant influence on the ultimate bearing capacity in the elastoplastic deformation stage.
Conclusions The experimental research methods and results can provide reference for the design of such deck structures.

HTML全文

参考文献(13)

施引文献

资源附件(0)