A novel bamboo plywood and thin-walled steel-tube dual-confined stone dust concrete composite column (BSDCC) is proposed to integrate the utilization of industrial solid waste and bamboo materials. Compression tests are performed on 12 BSDCC specimens. The failure mechanism is elucidated by analysing the entire process of specimen damage, the failure modes of the thin-walled steel tubes, the load-displacement curves, and the strain development patterns of different composite components. The test results show that the failure modes of the BSDCC specimens under compression were dominated by adhesive cracking failure of the bamboo plywood between the transverse binding bars in the middle of the column and the bamboo plywood on the tension side and yielding of the inner steel tube. Throughout the loading process, the specimens showed ideal elastoplastic behaviour, but the plastic capacity was not advantageous, and the plastic strengthening effect was not obvious. The bearing capacity of the stone dust concrete accounts for less than 10% of the total bearing capacity of the composite column, so the concrete strength is not the main factor improving the bearing capacity. The inner steel tube filled-with low-strength stone dust concrete can result in a composite column configuration with better mechanical properties, changes the failure mode of the composite column and the deformation mode of a cross-section, and delays the overall failure of the composite column. The setting of binding bars can effectively delay the bamboo plywood failure, and the outward partial buckling of the slab and steel tube enhances the restraint effect of the steel tube on the core concrete. Setting the binding bar in the middle of the column body can improve the column eccentric load bearing capacity and ductility. A formula for calculating the bearing capacity of BSDCCs under eccentric compression is established based on nonlinear regression analysis.

提出了一种新型的竹胶合板和薄壁钢管双约束石粉混凝土组合柱（BSDCC），以结合工业固体废物和竹材料的利用。对12个BSDCC标本进行压缩测试。通过分析试样破坏的全过程，薄壁钢管的失效模式，载荷-位移曲线以及不同复合构件的应变发展模式，阐明了失效机理。试验结果表明，BSDCC试件在压缩状态下的破坏模式主要是柱中间的横向约束杆与张紧侧的竹胶合板之间的粘胶开裂以及内钢管的屈服引起的。 。在整个加载过程中，试件表现出理想的弹塑性行为，但塑性容差不大，塑性强化效果不明显。石粉混凝土的承载力不到复合柱总承载力的10％，因此混凝土强度并不是提高承载力的主要因素。内钢管填充低强度石粉混凝土可产生具有更好机械性能的复合柱构造，改变复合柱的破坏模式和截面变形模式，并延迟整体破坏。复合列。设置绑扎杆可以有效地延迟竹胶合板的失效，平板和钢管的局部屈曲增强了钢管对核心混凝土的约束作用。将固定杆设置在柱体的中间可以提高柱体的偏心承载能力和延展性。基于非线性回归分析，建立了偏心受压状态下BSDCCs承载力的计算公式。