胶合竹-螺杆植筋锚固性能试验研究  

Experimental Research on Anchorage Performance of Glued-in Threaded Steel Rod in Glubam

作　　者：单波[1,2] 代上棋 孔原 林煜铭 张命鹏 黄斌 SHAN Bo;DAI Shangqi;KONG Yuan;LIN Yuming;ZHANG Mingpeng;HUANG Bin(College of Civil Engineering,Hunan University,Changsha 410082,China;College of Civil Engineering and Architecture,Hainan University,Haikou 570228,China;Zhejiang University(Ninghai)Joint Research Center for Bio-Based Materials and Carbon Neutral Development,Ningbo 315600,China)

机构地区：[1]湖南大学土木工程学院,长沙410082 [2]海南大学土木建筑工程学院,海口570228 [3]浙江大学(宁海)生物质材料与碳中和建设联合研究中心,浙江宁波315600

出　　处：《工业建筑》2022年第8期152-159,8,共9页Industrial Construction

基　　金：国家重点研发计划项目(2017YFC0703502);国家自然科学基金地区基金项目(52068019)。

摘　　要：聚焦于现代竹结构节点刚度的提升,开展胶合竹-螺杆植筋锚固性能研究,完成了12组胶合竹-螺杆单筋植筋节点的对拉试验,研究参数包括钻孔直径、锚固长度以及锚固长径比。试验观察到四种破坏模式,包括两种剪切破坏、螺杆屈服破坏与胶合竹劈裂破坏。对于直径分别为12 mm和16 mm的螺杆,其屈服破坏的临界锚固长径比可取为12.5和15。分析结果表明:胶合竹-单螺杆植筋连接的黏结强度随钻孔直径的增加而增大,随锚固长径比的增加而减小,选取直径相对较小的螺杆作为筋材,有利于提高传力效率;典型的胶合木-螺杆植筋黏结强度计算模型均不适用于胶合竹-螺杆植筋连接;基于试验结果,提出了胶合竹-单螺杆植筋连接承载力计算方法,计算值与试验结果较为接近。This study focused on improving the connection stiffness of modern bamboo structures. Total twelve groups, each including six identical glubam specimens with glued-in single threaded rod, were tested to failure in the pull-pull configuration. It was observed that the specimens exhibited four different failure modes, including two types of the shear failure at different interfaces, the yield failure of threaded rod, and the splitting failure of glubam. In order to control yield failure mode, the lower limit of bond length-diameter ratio could be taken as 12.5 and 15 for thread rods of M12 and M16, respectively. Analysis results showed that the bond strength of glued-in single threaded rod in glubam increased as increasing the drill-hole diameter, while it reduced as increasing the bond length-diameter ratio. Typical existing strength models for glued-in rod in timber were not fit to predict the bond strength of glued-in threaded rod in glubam. Based on test data in this investigation, a strength model was also proposed for the glued-in single threaded rod in glubam, and it showed a good prediction accuracy.

关 键 词：胶合竹 植筋 锚固性能 黏结强度 锚固长径比 

分 类 号：TU366.3[建筑科学—结构工程]