用环刚度法评价圆竹径向抗压力学性能
Radial compression mechanical properties of bambooculm by ring stiffness.
-
摘要: 根据圆竹在实际中的应用情况，本文提出用环刚度法作为圆竹径向抗压力学性能评价的主要指标。通过试验，确定了圆竹环刚度测试试件的长度等于试件的直径，测得毛竹的环刚度在80～180 kN/m2之间，远远大于QB/T 1916—2004中给出的最高级（SN16）。竹材在高度方向上的环刚度从基部到顶部呈增大趋势，4年生毛竹的环刚度优于6年生毛竹的环刚度。竹节可以有效提高圆竹的径向承载能力，带有竹节圆竹的环刚度是无竹节圆竹的2.30倍。在圆竹上加喉箍可以增加其径向破坏应变，而圆竹打孔使得其径向抗压力学性能随孔径的增加呈下降趋势。环刚度法具有测试迅速、可操作性强等特点，可以用于圆竹径向抗压力学性能的评价。Abstract: In this paper, Moso bamboo is the main object to study its radial compression mechanical properties of bambooculm by ring stiffness method. It was found that the optimum length of samples was its outer diameter. The ring stiffness of Moso bamboo was 80-180 kN/m2, far greater than QB/T 1916-2004 standard given in the SN16 level. Ring stiffness increased with stem height from bottom to top, but declined after 4-year-old. Bamboo joint can improve the radial compression of bamboo-culm，and that with bamboo joint was about 2.30 times of without. Using hose clamps can improve the strain of bambooculm, but the holes reduce its radial compression performance with the increase of hole diameter. Therefore, it is inferred that ring stiffness can be used as a novel and reliable method for assessing the radial compression mechanical properties of bamboo-culm.
-
-
期刊类型引用(1)
1. 肖虹雁, 岳彩荣. 合成孔径雷达技术在林业中的应用综述. 林业调查规划. 2014(02): 132-137 . 
百度学术
其他类型引用(5)
计量
- 文章访问数: 1553
- HTML全文浏览量: 166
- PDF下载量: 74
- 被引次数: 6
下载:
