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。
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 rods. In addition, the low stress transfer efficiency caused by the poor permeability of bamboo is the main reason for hindering the further improvement of the con- nection strength of bamboo plywood composites.
出处
《安徽农业大学学报》
CAS
CSCD
北大核心
2015年第2期177-180,共4页
Journal of Anhui Agricultural University
基金
国际竹藤中心基本科研业务费专项资金(1632011002
1632015013)资助
关键词
胶合植筋
胶合竹
影响因素
抗拔强度
破坏模式
epoxy bonded steel connection
bamboo plywood
impact factors
pullout strength
failure mode
