Withdrawal strength of nailed joints with decay degradation of wood and nail corrosion
Withdrawal strength of nailed joints with decay degradation of wood and nail corrosion
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木材腐烂退化和钉子腐蚀的钉接接头的拔出强度
DOI：
10.1007/s10086-016-1600-5
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发表时间：
2017
影响因子：
2.9
通讯作者：
Akio Koizumi
中科院分区：
文献类型：
--
作者：
Ryuya Takanashi;Kei Sawata;Yoshihisa Sasaki;Akio Koizumi
钉木节点广泛应用于木结构中，其劣化会造成严重的破坏。我们研究了在暴露于褐腐菌的标本中使用钢丝钉连接的拔拔强度。我们还检查了指甲腐蚀对拔拔强度的影响，因为高湿条件不仅加速木材腐烂，而且加速指甲的腐蚀。我们发现，指甲腐蚀增加了提取强度。在环向径向和环向切向钉入的节点上，锈蚀钉入的节点与最小锈蚀钉入的节点的抗拔强度之比分别为1.47和1.56。除钉腐蚀影响外，拔钉强度与质量损失和皮罗丁-钉-穿透-深度比呈负相关。我们通过将经验公式（由质量损失和pilodyn -pin-penetration- deep -ratio获得）的值分别乘以径向和切向钉入年轮的钉入节点的1.47和1.56，来估计腐朽木材和生锈钉子钉入节点的抗拔强度。
Nailed timber joints are widely used in timber structures, and their deterioration may cause significant damage. We investigated the withdrawal strength of joints using steel wire nails in specimens exposed to a brown-rot fungus. We also examined the effects of nail corrosion on withdrawal strength, because high humidity conditions accelerate not only wood decay but also the corrosion of nails. We found that nail corrosion increased the withdrawal strength. The ratios of withdrawal strength of nailed joints with rusted nails to that of joints with a minimally rusted nails were 1.47 and 1.56 in joints nailed in radial and tangential directions to annual rings, respectively. Withdrawal strength, excluding the effects of nail corrosion, had a negative correlation with mass loss and Pilodyn-pin-penetration-depth-ratio. We estimated the withdrawal strength of the nailed joint with decayed wood and rusted nails by multiplying the values from the empirical formula (obtained from mass loss and Pilodyn-pin-penetration-depth-ratio) by 1.47 and 1.56 for joints nailed in radial and tangential direction to annual rings, respectively.
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DOI：
10.2488/jwrs.57.359
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