Bamboo continues to be of interest in buildings and structures owing to its good mechanical properties and sustainability. In this study, a new method of bamboo use is proposed, which is to twine laminated bamboo lumber (LBL) slices to form a bamboo-fiber-reinforced composite tube (bamboo slices twining tube, BST). Considering the high tensile strength of bamboo fiber, BST is proposed to replace steel and FRP as the confining jacket acting on concrete. A total of 10 BST and BST-confined concrete (BCC) short columns were subjected to axial compressive tests using the BST wall thickness as a variable. The test results show that the mechanical properties of BSTs are close to those of engineered bamboo under tension and compression. The failure mode of the BCC specimens is the rupture of the BST wall in the middle of the columns. BSTs can effectively confine the concrete.The BST with a wall-thickness of 5 ~ 12 mm can enhance the compressive strength and the ultimate strains of the plain concrete (PC) column by more than 1/4 and 3 times, respectively. Finally, an analysis-oriented stress–strain model for the BCCs is proposed, and the predictions of the proposed model can reproduce the experimental curves well.

由于其良好的机械性能和可持续性，竹子继续受到建筑和结构的关注。本研究提出了一种新的竹材利用方法，将竹层压材（LBL）片缠绕成竹纤维增强复合管（bamboo slices twining tube，BST）。考虑到竹纤维抗拉强度高，建议用BST代替钢和FRP作为作用于混凝土的围护套。使用 BST 壁厚作为变量，对总共 10 个 BST 和 BST 约束混凝土 (BCC) 短柱进行了轴向压缩试验。测试结果表明，BSTs 在拉伸和压缩下的力学性能接近于工程竹。BCC 试件的破坏模式是柱中间 BST 壁的破裂。BSTs可以有效地约束混凝土。壁厚为5~12mm的BST可以分别提高素混凝土（PC）柱的抗压强度和极限应变1/4倍以上和3倍以上。最后，提出了以分析为导向的 BCC 应力-应变模型，该模型的预测可以很好地再现实验曲线。