胶合竹植筋深度及直径对抗拔性能的影响.PDF

安徽农业大学学报, 2015, 42(2): 177-180 Journal of Anhui Agricultural University [DOI] 10.13610/ki.1672-352x029 网络出版时间：2015-3-2 15:31:52 [URL] /kcms/detail/34.1162.S1531.029.html 胶合竹植筋深度及直径对抗拔性能的影响 1,2 1 3 1∗ 严 彦 ，刘焕荣 ，聂玉静 ，张秀标 (1. 国际竹藤中心，北京 100102；2.安徽太平试验中心，太平 245716 ；3. 浙江农林大学工程学院，临安 311300) 摘 要：采用胶合竹梁、双组份环氧树脂胶黏剂，不同直径和长度的公制螺纹杆，进行胶合竹顺纹双端植筋拉 伸试件制备及测试，初步分析研究了植入深度和植筋杆直径 2 个因素对胶合植筋强度和破坏模式的影响。抗拉试验 破坏模式主要为植筋杆的拔出破坏和螺纹杆的韧性断裂破坏 2 种模式，其中植筋杆的拔出破坏位于胶合竹/胶黏剂 界面；胶合竹顺纹双端植筋的破坏载荷及名义剪切强度随螺纹杆直径和植入深度增加而增大；胶合竹基材较胶合木 基材渗透性差，植筋杆受力不能很好地传递到竹材内部，是影响抗拔载荷主要因素之一。 关键词：胶合植筋；胶合竹；影响因素；抗拔强度；破坏模式 中图分类号：S785; TQ351 文献标识码：A 文章编号：1672−352X (2015)02−0177−04 Effects of the glued-in threaded rod depth and diameter on the connection strength of structural glued laminated bamboo 1, 2 1 3 1 YAN Yan , LIU Huanrong , NIEYujing , ZHANG Xiubiao (1. International Center for Bamboo and Rattan, Beijing 100102; 2. Anhui Taiping Experimental Station, Taiping 245716; 3. School of Engineering, Zhejiang A F University, Lin’an 311300) Abstract: Through the both-end pullout test on the glued-in threaded rods in bamboo plywood, the effects of the depth and the diameter of the embedded rods in the bamboo glulam on the connection strength and the failure modes were investigated. Two failure modes were identified during the pullout test: the fracture of threaded rods and the pullout failure of the rods that existed in the interface between bamboo and the adhesive. The pullout critical load and the normal shear strength of both-end glued-in rods in bamboo plywood increased with an in- crease of the diameter and embedded length of the threaded