竹集成材方柱墩轴压力学性能

对竹集成材方柱墩试件3个方向的轴心受压力学性能进行了研究与对比分析，探讨了竹集成材方柱墩各向轴心受压的破坏机理。3个方向的受压破坏均为延性破坏，横纹受压Ⅰ和横纹受压Ⅱ受压破坏的过程及形态较为接近。竹集成材方柱墩顺纹抗压强度值最大，但是试验结果的离散性较大。两个横纹方向的抗压强度值基本相等，试验结果离散性较小。竹集成材方柱墩试件3个方向的受压破坏过程可以分为弹性阶段、弹塑性阶段、塑性阶段和破坏阶段。顺纹方向的弹性模量大于另外两个方向的弹性模量，另外两个方向的弹性模量基本相等。3个方向的荷载轴向位移关系均可以用1个三段线模型表示。
In order to investigate the compressive strength performance of laminated bamboo square column, an experimental study was carried out in three axial directions. All the axial compression failures belonged to the ductile damage. The compression failure process and mode for the two directions perpendicular to the grain were similar to each other. The compressive strength parallel to the grain was the highest but the test data were scattered. The strength values for the other two directions were almost equal to each other with less variation. The whole failure processes in all the three directions were similar and could be divided into elastic stage, elastic？？plastic stage, plastic stage and failure stage. The two elastic modulus perpendicular to the grain were equal to each other and smaller than that parallel to the grain. A tri？？linear model was proposed which can be used for all the three directions