重组竹柱轴心受压试验研究

Experimental research on parallel bamboo strand lumber column under axial compression

为了研究竹材重组材轴心受压柱的力学性能,选取根部原竹制作竹材重组材构件,并进行试验研究与分析。详细描述了试件的破坏过程,结果表明,竹材重组材轴压柱的破坏是一种延性破坏,其破坏形式可以分成两类:一类是柱顶部或底部被压溃而导致的强度破坏;另一类是横向变形过大,跨中受拉侧纤维被拉断而出现的失稳破坏。重组竹试件的极限承载力随着长细比的增大而减小。在试验研究与分析的基础上,给出了竹材重组材轴心受压柱承载力计算公式,推导公式的计算结果与试验结果吻合良好。

In order to investigate the mechanical performance of parallel bamboo strand lumber(PBSL)column under axial compression,the specimens have been made choosing the root part of the original bamboo and a series of axial compression tests have been done.The whole failure process for the specimens has been described in details on the basis of the test results.The failure for the parallel bamboo strand lumber column for structural use belongs to ductile failure under axial compression condition and the failure modes can be divided into two series.The ultimate load decreases as the increasing of the slenderness ratio.An equation is proposed for calculating the slenderness ratio influencing coefficient of PBSL columns.The calculation results obtained from the equations give a good agreement with the test results.