Bamboo has been widely used as a load-bearing material in construction; however, there are limited studies on the stability of slender original bamboo columns. Based on the experimental investigation of thirty-nine original bamboo columns, parametric analyses were conducted to investigate the influence of the diameter–thickness ratio, cross-sectional area and slenderness ratio on the axial compression behavior of original bamboo columns. The test results indicate that the failure modes of the columns are substantially affected by the slenderness ratio and diameter–thickness ratio. For columns with the same diameter–thickness ratio, the ultimate bearing capacity was negatively correlated with the slenderness ratio, and the highest reduction rate for the load-bearing capacity caused by the slenderness ratio was 44.39%. Under the same slenderness ratio, when the diameter–thickness ratio increased by 18.75%, the ultimate bearing capacity increased by 82.65%. An excessive slenderness ratio may result in local buckling, leading to underutilization of the material strength when failure occurs and substantially reducing the load capacity of bamboo columns. Local buckling can be mitigated by decreasing the slenderness ratio and increasing the diameter–thickness ratio. According to the test results, the model predicting the compressive bearing capacity of the original bamboo column was proposed considering the slenderness ratio and diameter–thickness ratio, and it was indicated that the proposed model can provide satisfactory predictive results.

中文翻译：

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细长比和截面几何形状对原始竹柱轴向压缩行为的影响

竹子已被广泛用作建筑的承重材料。但是，对于细长的原始竹柱的稳定性研究很少。在对39根原始竹柱进行实验研究的基础上，进行了参数分析，以研究直径-厚度比，横截面积和细长比对原始竹柱的轴向压缩行为的影响。测试结果表明，柱的破坏模式受细长比和直径-厚度比的影响很大。对于相同的直径-厚度比的柱，极限承载力与细长比成负相关，并且由细长比引起的最大承载力降低率为44.39％。在相同的细长比下，当直径/厚度比增加18.75％时，极限承载力增加82.65％。细长比过大可能会导致局部屈曲，导致发生破坏时材料强度的利用率不足，并大大降低竹柱的承载能力。减小屈曲比并增加直径/厚度比可以减轻局部屈曲。根据试验结果，提出了考虑长细比和直径-厚度比的预测竹柱抗压承载力的模型，并表明该模型可以提供满意的预测结果。细长比过大可能会导致局部屈曲，导致发生破坏时材料强度的利用率不足，并大大降低竹柱的承载能力。减小屈曲比并增加直径/厚度比可以减轻局部屈曲。根据试验结果，提出了考虑长细比和直径-厚度比的模型，用于预测原始竹柱的抗压承载力，并表明该模型可以提供令人满意的预测结果。细长比过大可能会导致局部屈曲，导致发生破坏时材料强度的利用率不足，并大大降低竹柱的承载能力。减小屈曲比并增加直径/厚度比可以减轻局部屈曲。根据试验结果，提出了考虑长细比和直径-厚度比的预测竹柱抗压承载力的模型，并表明该模型可以提供满意的预测结果。减小屈曲比并增加直径/厚度比可以减轻局部屈曲。根据试验结果，提出了考虑长细比和直径-厚度比的模型，用于预测原始竹柱的抗压承载力，并表明该模型可以提供令人满意的预测结果。减小屈曲比并增加直径/厚度比可以减轻局部屈曲。根据试验结果，提出了考虑长细比和直径-厚度比的模型，预测了原竹柱的抗压承载力，表明该模型可以提供满意的预测结果。