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为了研究偏心距对重组竹柱的偏心受压力学性能的影响,对6根不同偏心距的重组竹柱进行了偏心受压试验。结果表明:在偏心载荷作用下,试件破坏形态主要表现为柱身中部竹材纤维受拉断裂;随着相对偏心距的增大,峰值载荷减小,而对应峰值载荷时试件的竖向位移和中部截面侧向挠度增大,弯曲变形越加显著,对应峰值载荷时,重组竹柱偏心受压试件的竹材压应变远远大于轴心受压试件,前者是后者的3.1~4.6倍,偏心受压重组竹柱的受压侧竹材的受压变形能力及强度得到了充分的发挥;基于试验结果与理论分析,提出了重组竹柱偏心受压承载力计算方法,平均绝对误差小于5%,计算结果与试验结果一致。
In order to study the influence of eccentricity on the eccentric compression mechanics performance of recombinant bamboo columns, eccentric compression tests were carried out on six kinds of bamboo columns with different eccentricity. The results show that under the eccentric load, the failure morphology of the specimens is mainly tensile fracture of the bamboo fiber in the middle of the column body. With the increase of relative eccentricity, the peak load decreases, while the vertical displacement of the specimen corresponding to the peak load And the lateral deflection of the middle section increases, the bending deformation becomes more significant. At the corresponding peak load, the bamboo’s compressive strain of the reorganized bamboo column eccentric compression specimen is far greater than the axial compression specimen, the former is the latter 3.1 ~ 4.6 The compressive deformation capacity and strength of the pressed bamboo of the double and eccentric compression reorganized bamboo columns are fully exerted. Based on the test results and theoretical analysis, the calculation method of the eccentric compression bearing capacity of the reorganized bamboo columns is proposed. The average absolute error is less than 5%, the calculated results are consistent with the test results.