Laminated bamboo lumber (LBL) has become increasingly popular in recent years attributed to its superior mechanical properties compared to wood. The nailed LBL-to-LBL connection comprised of LBL main member sandwiched between two LBL plates is introduced, which plays an essential role in the safe and reliability design of modern bamboo structures. A comprehensive study was conducted in order to determine effect of the parameters on load-slip behavior and failure modes of specimens loaded parallel to grain, including end distance, edge distance, row spacing, center-to-center spacing, number of lines and rows of nails. Three main failure modes were investigated in the experiments, namely bearing failure, splitting failure and row shear failure. Minimum requirements of end distance, edge distance, row spacing and center-to-center spacing in nailed connections were suggested to avoid brittle failures. Results showed that the strength of a multi-nail connection equal the strength of a single nail connection multiplied by an effective number of nails, which is smaller than the actual number of nails. Furthermore, the Foschi formula used to model wood connections can also predict the full process failure of LBL nailed connections and were in good agreement with experimental results. The provided experimental results are motivation for development of design and analytical modes of LBL structures containing nailed LBL-to-LBL connections.

中文翻译：

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平行于纹理加载的钉式 LBL-to-LBL 连接的实验分析

近年来，层压竹材 (LBL) 因其与木材相比优越的机械性能而变得越来越受欢迎。介绍了由LBL主构件夹在两块LBL板之间组成的钉LBL-to-LBL连接，它在现代竹结构的安全可靠性设计中起着至关重要的作用。进行了一项综合研究以确定参数对平行于纹理加载的试样的载荷滑移行为和破坏模式的影响，包括端距、边距、行距、中心距、行数和行数的指甲。试验研究了三种主要的破坏模式，即轴承破坏、劈裂破坏和行剪切破坏。端距、边距的最低要求，建议钉连接中的行间距和中心到中心间距以避免脆性破坏。结果表明，多钉连接强度等于单钉连接强度乘以有效钉数，小于实际钉数。此外，用于模拟木材连接的 Foschi 公式还可以预测 LBL 钉连接的全过程失效，并且与实验结果非常吻合。提供的实验结果是开发包含钉式 LBL-to-LBL 连接的 LBL 结构的设计和分析模式的动机。这比实际的钉子数量少。此外，用于模拟木材连接的 Foschi 公式还可以预测 LBL 钉连接的全过程失效，并且与实验结果非常吻合。提供的实验结果是开发包含钉式 LBL-to-LBL 连接的 LBL 结构的设计和分析模式的动机。这比实际的钉子数量少。此外，用于模拟木材连接的 Foschi 公式还可以预测 LBL 钉连接的全过程失效，并且与实验结果非常吻合。提供的实验结果是开发包含钉式 LBL-to-LBL 连接的 LBL 结构的设计和分析模式的动机。