The axial compressive behavior of laminated bamboo lumber (LBL) columns with a chamfered section was investigated using 15 specimens with lengths varying from 600 mm to 3000 mm; all considered samples had same square cross section of 100 mm × 100 mm with 10 mm chamfers at each corner. Axial compression tests were carried out to analyze the impact of slenderness ratios on failure modes, strain and ultimate bearing capacity of LBL columns. Two failure modes were observed i.e. compression failure and buckling failure. Obtained results on the ultimate vertical strain and ultimate load showed a downward trend with the increase in slenderness ratios; the correlation between the ultimate strain, ultimate load and the slenderness ratios were fitted. The approximate solution method was adopted to reveal the lateral deflections of buckling columns by a quartic functional model. Based on the ideal elastic–plastic constitutive model and Hill failure criterion, FEM was carried out to simulate the axial compression tests. The simulation results agreed well with both test and theoretical results, which verified the feasibility of proposed methods used under similar working conditions in this paper.

使用15个长度从600 mm至3000 mm不等的试样研究了具有倒角截面的层压竹木（LBL）柱的轴向压缩行为。所有考虑的样品均具有100 mm×100 mm的相同正方形横截面，每个拐角处都有10 mm的倒角。进行了轴向压缩试验，以分析细长比对LBL柱的破坏模式，应变和极限承载力的影响。观察到两种失效模式，即压缩失效和屈曲失效。获得的极限竖向应变和极限载荷结果随着细长比的增加而呈下降趋势。拟合了极限应变，极限载荷和细长比之间的关系。采用近似解法通过四次函数模型揭示了屈曲柱的侧向挠度。基于理想的弹塑性本构模型和Hill破坏准则，进行了有限元模拟来模拟轴向压缩试验。仿真结果与试验和理论结果吻合良好，验证了本文提出的方法在类似工作条件下使用的可行性。