大跨度双层板架结构轴压极限强度试验与仿真研究

Experimental and numerical study of ultimate strengths of long-span box-framed structures on ships under compressive load

  • 摘要: 摘 要:【目的】为了探究大跨度双层板架结构在轴压作用下的极限承载能力以及崩溃特性,【方法】本研究选取典型船舶大跨度双层板架结构作为研究对象,设计并开展了大跨度双层板架结构轴压极限强度试验,并将试验结果与仿真进行对比。【结果】试验结果表明上下层甲板的整体屈曲失稳是大跨度双层板架结构崩溃的主要原因,在与仿真结果对比中验证了轴压载荷的分载效应对结构极限承载能力影响显著。【结论】在实际仿真评估中,应将分载效应纳入分析以获得安全保守的评估结果。

     

    Abstract: Objectives In order to explore the ultimate bearing capacity and collapse buckling characteristics of long-span double-layer plate frame structures under axial compression, Methods In this study, a typical ship long-span double-layer plate frame structure was selected as the research object, and the axial compressive ultimate strength test of the long-span double-layer plate frame structure was designed and carried out, and the test results were compared with the simulation. Results The test results show that the overall buckling instability of the upper and lower decks is the main reason for the collapse of the long-span double-deck structure, and the comparison with the simulation results verifies that the subload effect of the axial compressive load has a significant impact on the ultimate bearing capacity of the structure. Conclusions In the actual simulation evaluation, the load sharing effect should be included in the analysis to obtain the safety and conservative evaluation results.

     

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