基于仿生竹材原态多方重组材的轴心抗压性能研究  

Axial compressive properties of glue-pressed engineered honeycomb bamboo(GPEHB)

作　　者：张彬[1] 傅万四[1] 周建波[1] 闫薇[1] 

机构地区：[1]国家林业局北京林业机械研究所,北京100029

出　　处：《木材加工机械》2017年第2期27-31,共5页Wood Processing Machinery

基　　金：林业公益性行业科研专项"大规格竹重组材制造关键技术;装备研发与示范(201304503)"

摘　　要：研究的多方重组材利用了仿生学原理,将单根竹材有机地结合起来,降低了竹材的不均匀性,提升了原竹材的承载能力,而且其中空构造使得其强重比优于同体积其它建筑材料。多方重组材主要作为承重柱在建筑领域应用,那么它的轴心抗压性能就是重点考察的力学性能。通过对原态重组材竹柱进行轴心方向施压,竹柱中部应变和竖向变形的采集,研究了多方重组材的轴心抗压性能,其最大竖向承载力为269kN,最大竖向变形为19.5mm,最大纵向应变约为2500,最大横向应变约为1500。结果表明:在轴心抗压载荷的作用下,试件破坏形式为屈曲破坏,破坏形态主要表现为多方竹单元在铣削面的劈裂与竹单元的鼓包。本试验证明了多方重组材是一种具有明显弹、塑性阶段的塑性材料,为其进一步的力学性能研究提供了依据。多方重组材的出现为竹材的工业化利用提供了一种新颖的方案。In this paper, the Glue-Pressed Engineered Honeycomb Bamboo （GPEHB） used in the study of the principle of bionics. It makes the organic combination of the single bamboo, reducing the non-uniformity of bamboo, enhancing the carrying capacity of the original bamboo. And the strength ratio of hollow structure is better than that of the same volume other building materials, GPEHB are mainly used as a load-bearing column in the construction, so its axial compression performance is focused on the study of mechanical properties. In this paper, the axial compressive performance of GPEHB was studied by loading in the axial direction, with the collection of strain and vertical deformation in the central bamboo column. The maximum vertical bearing capacity was 269kN, the maximum vertical deformation was 19.5mm, the maximum longitudinal strain was about 2500, the maximum lateral strain was about 1500. The resultshows that under the action of axial compressive load, the failure mode of the specimen is buckling failure. And the GPEHB is a kind of plastic material with obvious elastic and plastic phases, which provides the basis for further study of its mechanical properties. The emergence of GPEHB provides a novel program for the industrial utilization of bamboo.

关 键 词：竹材原态 轴心抗压性能 蜂窝结构 重组竹材 

分 类 号：TS653[轻工技术与工程]