Shear Performance of Nail Connection in Seismic Diaphragm Using Bamboo-Wood Composite Boards

ZHANG Dezhi; WANG Zhaohui; ZHAO Hongbo; SONG Weide; REN Haiqing; DUAN Xinfang; LU Tonghua

doi:10.12326/j.2096-9694.2024031

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Shear Performance of Nail Connection in Seismic Diaphragm Using Bamboo-Wood Composite Boards
1.Research Institute of Wood Industry，Chinese Academy of Forestry，Beijing 100091，China
2.TREEZO Investment Group Co.，Ltd.，Hangzhou 311100，Zhejiang，China
Vol. 38, Issue 6, Pages: 47-54(2024)
Published： 30 November 2024 ，
DOI： 10.12326/j.2096-9694.2024031
稿件说明：

移动端阅览

ZHANG DEZHI, WANG ZHAOHUI, ZHAO HONGBO, et al. Shear Performance of Nail Connection in Seismic Diaphragm Using Bamboo-Wood Composite Boards. [J]. Chinese journal of wood science and technology, 2024, 38(6): 47-54.
DOI：

ZHANG DEZHI, WANG ZHAOHUI, ZHAO HONGBO, et al. Shear Performance of Nail Connection in Seismic Diaphragm Using Bamboo-Wood Composite Boards. [J]. Chinese journal of wood science and technology, 2024, 38(6): 47-54. DOI： 10.12326/j.2096-9694.2024031.

摘要

现代木结构楼盖面板通过钉连接固定框架材，面板钉连接抗剪性能是决定楼盖刚度的主要因素，对于木结构抗震性能具有重要影响。以28 mm厚A级竹木复合板为面板，兴安落叶松（

Larix gmelini

）规格材为框架材，采用两种规格圆钢钉制作钉连接抗剪试件，同时选择18 mm厚定向刨花板（OSB/3型）为面板制作对照钉连接试件，并进行单调加载试验，分析面板材料、钉规格尺寸及加载方向对钉连接抗剪性能的影响。结果表明：竹木复合板钉连接试件顺纹方向抗剪初始刚度和延性系数均大于横纹，而最大荷载相反；定向刨花板钉连接试件顺纹与横纹差异不明显。当钉直径增加，竹木复合板钉连接主要抗剪性能

提高，而刚度和延性系数降低；为了减少框架材开裂的风险，CN75钉更适用于28 mm厚竹木复合板面板与框架材连接。竹木复合板CN75钉连接试件与对照OSB钉连接试件相比，容许荷载高44%，初始刚度增加1倍以上，抗剪破坏模式没有面板贯穿现象，仅在剪切部位销槽压溃后出现钉弯曲拔出现象。Hassanieh模型能较好地模拟竹木复合板钉连接抗剪荷载-位移关系，可为竹木复合板钉连接节点和楼盖结构分析提供基本数据。

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

Keywords

bamboo-wood composite board(BWC)nail connectionshear performanceseismic diaphragm

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