指接位置对竹材原态多方重组材抗压性能的影响

Effect of finger-joint position on compressive properties of Glue Pressed Engineered Honeycomb Bamboo(GPEHB)

研究了指接位置对竹材原态多方重组材抗压性能的影响。本文对竹材原态多方重组材进行了轴向抗压试验,其结果表明:最先破坏的是指接位置。竹材原态多方重组材的破坏形式主要是竹单元的鼓包、劈裂和指榫的压溃、胶层脱落。随着指接位置不断地向上端部移动,竹材原态多方重组材承受抗压强度的能力不断上升,但是到了距离上端部1/5处时,其能力反而下降。可得结论:对于1m长的竹材原态多方重组材,指接位置布置在1/4处时较为合适。

In this paper, it demonstrates the effect of finger-joint position on the compressive properties of Glue Pressed Engineered Honeycomb Bamboo （GPEHB）. The axial compressive tests were carried out on GPEHB, and the results showed that the first failure was the joints. The main form of destruction of GPEHB is the swell, split of the cell and the crush of the tenon, desquamate of the bond line.As the finger-joint position continues to move toward the upper end, the compressive strength of the GPEHB is increasing, but the compressive strength decreases when the finger-joint position is located at 1/5 of the specimen. As a result, more appropriate finger placement position is at 1/4 for the 1 m GPEHB.