紧固件数量对CLT钢木连接节点性能的影响  

The Influence of the Number of Fasteners on the Properties of CLT Steel-to-Timber Connections

作　　者：钟淼麟 李静[1] 强智森 胡宪睿 ZHONG Miao-lin;LI Jing;QIANG Zhi-sen;HU Xian-rui(School of Civil Engineering and Transportation,South China University of Technology,Guangzhou 510641,Guangdong,P.R.China)

机构地区：[1]华南理工大学土木与交通学院,广东广州510641

出　　处：《林产工业》2021年第10期18-23,共6页China Forest Products Industry

基　　金：广东省省级科技计划(2020A1414010101)。

摘　　要：为探究紧固件数量对CLT节点力学性能的影响,分别对紧固件数量为6、9、12、15、18个的CLT钢木连接节点在平行于木纹方向和垂直于木纹方向进行剪力单调加载试验。结果表明:连接节点的破坏形式主要为环纹钉的弯剪破坏和弯曲变形;紧固件数量多于15个且垂直于木纹方向的连接节点在承受剪力荷载时还伴随层板的撕裂破坏。随着紧固件数量的增加,钢木节点的屈服强度、最大强度、极限强度及其对应的位移增大,节点延性比增大,耗能能力增强;在相同紧固件数量下平行于木纹方向节点的耗能能力优于垂直木纹方向节点的耗能能力。To investigate the influence of the number of fasteners on the mechanical properties of CLT connections,monotone tests under shear loading were carried out on CLT steel-to-timber connections with the number of fasteners being 6,9,12,15 and 18 respectively in the direction parallel and perpendicular to the grain.The test results showed that the failure modes of the connections were mainly the bending shear failure and bending deformation of the annular-ringed shank nails,and the wood crushing of the CLT lamination perpendicular to grain was founded when the fasteners are greater than 15.The yield strength,maximum strength,ultimate strength and the corresponding displacement of the steel-to-timber connections increased with the growth of fastener numbers.Besides,the greater the number of fasteners,the greater the ductility ratio and the stronger the energy dissipation capacity.Under the uniform fastener number,the energy dissipation capacity of the connection parallel to grain was stronger than the connection perpendicular to grain.

关 键 词：正交胶合木 钢木连接节点 环纹钉 力学性能 延性比 

分 类 号：TS653[轻工技术与工程] TU366.2[建筑科学—结构工程]