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Research on Mechanical Properties of Bamboo Winding Composite Pipe Reinforced Thin-Walled Steel Tube Composite Structures Under Axical Compression
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摘要: 竹缠绕复合管是由我国独立研发的一种新型环保材料,为研究其约束薄壁圆钢管组合结构的轴压性能,对组合试件进行轴压试验,研究组合试件的破坏形式、承载能力;分析了荷载与位移、应变的变化趋势;并提出组合试件轴压极限承载力理论计算公式。最后运用ABAQUS有限元软件对组合试件进行参数化分析,分析了竹缠绕复合管厚度等参数对轴压性能的影响。试验结果表明:组合试件的破坏形式为试件中部侧向弯曲破坏;相比纯竹缠绕复合管和钢管,组合试件的极限承载力分别提高了6.5倍和1.5倍;试验结果与有限元模拟结果吻合较好,理论计算承载力算式与试验结果误差为 5.9%。Abstract: The bamboo winding composite pipe is a new type of environmentally-friendly material independently developed in China. In order to study the reinforced thin-walled circular steel tube composite structures, axial compression tests were conducted on the composite specimens, and the failure modes and bearing capacity of the composite specimens were studied. Trends of load versus displacement and strain were analyzed, and a theoretical calculation formula for the axial compression ultimate bearing capacity of the composite specimens was proposed. Finally, ABAQUS finite element software was used to analyze the parametric analysis of the composite specimen, as well as the influence of the thickness of bamboo winding composite pipe and other parameters on the axial compression performance. The experimental results showed that the failure mode of the composite specimens was lateral bending failure in the middle section of the specimen. Compared to pure bamboo winding composite pipes and steel tubes, the ultimate bearing capacity of the composite specimens had increased by 6.5 times and 1.5 times, respectively. The experimental results were in good agreement with the finite element simulation results, and the error between the theoretical calculation bearing capacity formula and the experimental results was 5.9%.
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