木材科学与技术2024，Vol.38Issue(6)：47-54,8.DOI:10.12326/j.2096-9694.2024031
抗震型楼盖竹木复合板钉连接抗剪性能研究
Shear Performance of Nail Connection in Seismic Diaphragm Using Bamboo-Wood Composite Boards
摘要
Abstract
A diaphragm board fastened to the frame by nails or screws in modern wood structure is the main factor determining the diaphragm structure stiffness,which significantly impact the seismic performance of the whole wood structure.In this study,the single shear specimens of nail joints were fabricated with the bamboo-wood composite board(BWC)and oriented strand board(OSB)on larch dimensional-lumber frame.The monotonic loading tests were carried out to investigate the effects of nail size,panel material,and grain direction on the nail joints properties.The results showed that the initial shear stiffness and ductility coefficient of nail joints of BWC along grain direction were greater than those across grain direction,however these scenarios reversed at the maximum load.There was no obvious difference between grain direction in OSB.When the nail diameter increased,the main shear performance of BWC nail joints increased,while the stiffness and ductility coefficients decreased.To minimize the risk of cracking of the larch wood frame,CN75 nails were recommended for the connection of the 28 mm thick BWC to the frame.The allowable load was 44%higher than that of the 18 mm-thick OSB nail joints.Furthermore,the initial stiffness was one time higher than that of 18 mm thick OSB;The shear failure mode of the BWC nail connection did not have the phenomenon of pulling through the board,and the nails mainly crush the wood and were bent to pull out at the shear plane.The Hassanieh model can simulate the shear load displacement curve of BWC,which provides prime data for structural analysis of BWC nail joints.关键词
竹木复合板/钉连接/抗剪性能/抗震型楼盖Key words
bamboo-wood composite board(BWC)/nail connection/shear performance/seismic diaphragm分类
建筑与水利引用本文复制引用
张德志,王朝晖,赵弘博,宋炜德,任海青,段新芳,陆铜华..抗震型楼盖竹木复合板钉连接抗剪性能研究[J].木材科学与技术,2024,38(6):47-54,8.基金项目
中央级公益性科研院所基本科研业务费专项基金"抗震木结构技术研究与应用"(CAFYBB2020SY046) （CAFYBB2020SY046）
国家林业和草原局重点研发项目"覆面用定向刨花板木结构剪力墙性能及其抗震技术研究"(GLM[2021]08号). （GLM[2021]08号）
