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对大尺度重组竹试件进行了3个方向轴心受压试验研究与分析,探讨了其破坏机理及所测参量之间的相互关系.竹重组材的受压破坏属于延性破坏,沿3个方向的破坏过程均经历弹性阶段、弹塑性阶段、塑性阶段和破坏阶段;但破坏阶段有所区别.试件各向受压的最终破坏形态较接近,均出现沿对角线方向的主裂缝.顺纹方向的实测抗压强度、弹性模量和泊松比值最大,离散性较大;横纹方向Ⅰ的抗压强度稍大于横纹方向Ⅱ的抗压强度,但其弹性模量和泊松比均比横纹方向Ⅱ对应的值要小.基于试验结果,给出了各个方向抗压强度、弹性模量和泊松比相互之间对应的关系.
Three large-scale reorganized bamboo specimens were subjected to axial compression test and analysis, and the relationship between the failure mechanism and the measured parameters was discussed. The compression damage of bamboo reorganized material belongs to ductile damage along the three The failure process in the direction all experienced elastic phase, elastic-plastic phase, plastic phase and failure phase, but the damage phase was different.The ultimate failure modes of the specimens in all directions were close and all appeared along the diagonal main cracks. The measured compressive strength, elastic modulus and Poisson’s ratio in the direction parallel to the grain direction are the largest and the dispersity is large. The compressive strength of the transverse grain direction I is slightly greater than the compressive strength of the transverse grain direction II, but the elastic modulus and Poisson’s ratio The value corresponding to the transverse direction II is smaller.According to the experimental results, the corresponding relationship between compressive strength, elastic modulus and Poisson’s ratio in each direction is given.