An experimental study on shear strength of glubam
An experimental study on shear strength of glubam
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DOI：
10.1016/j.conbuildmat.2017.06.005
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发表时间：
2017-09
影响因子：
7.4
通讯作者：
Yan Xiao;Yiqiang Wu;Jun Li;R. Yang
中科院分区：
文献类型：
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作者：
Yan Xiao;Yiqiang Wu;Jun Li;R. Yang
竹集成材是一种新型的结构材料，是替代集成材而发展起来的。与现代木结构类似，使用钢接头连接glubam元件需要对材料的剪切行为有很好的了解。本研究以三种不同竹条（或竹纤维）配置之胶合板为研究对象。制备并测试了三种类型的glubam板，包括在两个正交方向上分别以4：1和1：1的比例具有两种双向纤维排列的glubam和单向纤维排列的glubam。根据常规木材的抗剪强度测试规范，对不同加载条件下的抗剪强度进行了实验研究。研究发现，面内抗剪强度值很好地遵循正态分布，而面外抗剪强度值可以用威布尔分布进行统计表达。根据试验结果，研究了胶合板的面外抗剪强度和面内抗剪强度，提出了胶合板的特征值和设计值。同时还得到了竹篾（或纤维）双向比与面外抗剪强度的关系，与试验结果有较好的相关性。
Glued-laminated bamboo (glubam) is a new type of structural material, which is developed as a potential alternative to the glued-laminated lumber or glulam. Similar to modern timber structures, connecting the glubam elements using steel joints requires a good understanding of the shear behavior of the material. In this study, glubam boards with three different bamboo strip (or fiber) configurations are manufactured and studied. Three types of glubam boards were manufactured and tested, including glubam with two bidirectional fiber arrangements at the ratios of 4:1 and 1:1, respectively, in the two orthogonal directions, and also the unidirectional fiber arrangement. The shear strengths in different loading conditions are experimentally investigated, following testing specifications for conventional wood. The study found that the in-plane shear strength values follow a normal distribution well, whereas the out-of-plane shear strength values can be statistically expressed by Weibull distribution. Based on the test results, the out-of-plane shear strengths and the in-plane shear strengths of glubam are studied, and the characteristic values and the design values are suggested. The relationship between the out-of-plane shear strength and the bidirectional ratio of bamboo strip (or fiber) has also been obtained with reasonably good correlation to the test results.