Variation of through-culm wall morphology in P. edulis bamboo strips used in glue-laminated bamboo beams
Variation of through-culm wall morphology in P. edulis bamboo strips used in glue-laminated bamboo beams
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DOI：
10.1016/j.conbuildmat.2019.117248
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发表时间：
2020-01
影响因子：
7.4
通讯作者：
Yusuf Akinbade;K. Harries;Bhavna Sharma;M. Ramage
中科院分区：
文献类型：
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作者：
Yusuf Akinbade;K. Harries;Bhavna Sharma;M. Ramage
图像分析用于量化纤维体积比VF在OFP带材中的分布。从两种市面上可以买到的胶合竹梁产品中获得的食用竹。总共分析了包含超过3500个19 × 6 mm带材的58个横截面。发现简单的数字处理技术在从1200 dpi源图像中建立纤维体积数据方面效果很好。建立了每个带材的总纤维体积，并发现其通过带材厚度以线性方式变化。所提供的观察表明，两家制造商使用的竹子来源(原料)材料有很大不同。用自相关分析表明，每个梁截面中各条带的取向不是随机的。非随机分布的带材取向在受弯截面上的影响相对较小，但确实会导致与假设力学性能均匀分布的分析不同。最后，节点是胶合竹材构件中的一个薄弱部位，在给定的横截面上占所有条带的3-4%。节点的分布似乎是随机的。
Image analysis is used to quantify the distribution of fibre volume ratio,Vf, in strips ofP. edulisbamboo obtained from two commercially available glue-laminated bamboo beam products. In total, 58 cross sections containing more than 3500 19 × 6 mm strips were analysed. Simple digital manipulation techniques were found to work well in establishing fibre volume data from the 1200 dpi source images. Total fibre volume for each strip was established and was found to vary in a linear manner through the strip thickness. The observations presented indicate significantly different bamboo source (feedstock) material used by the two manufacturers. Autocorrelation analysis was used to demonstrate that the orientation of the individual strips in each beam section was not random. The impact of a non-random distribution of strip orientation in a section subject to flexure is relatively small but does result in variation from analyses that assume a homogenous distribution of mechanical properties. Finally, nodes, a weak location in glued-laminated bamboo members were observed to represent 3–4% of all strips in a given cross section. The distribution of nodes appeared to be random.