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Nail Holding Performance of self-tapping screws on Masson Pine and Chinese Fir Dimension Lumbers

Journal of Renewable Materials 2023年第10期11卷 3725-3738页

作者： De Li Bengang Zhang Yuan Tu Guoming Xiao Meifen Tian Xiaoxue Xu Xiao Zhong Qiaoyan Zhang Zhigang Wu Jiankun Liang College of Forestry Guizhou UniversityGuiyang550025China Forestry Science and Technology Promotion Station Xifeng County Bureau of Natural ResourcesGuiyang551100China Forest Park Management Section Zhazuo State-Owned Forest FarmGuiyang550299China College of Civil Engineering Kaili UniversityQiandongnan556011China

Screw connection is a type most commonly applied to timber *** important commercial tree species in China,Masson pine and Chinese fir have the potential to prepare wood *** this study,the effects of the diameter of the self-tapping screw and the guiding bores on the nail holding performance on different sections of Masson pine and Chinese fir dimension lumbers were mainly *** results showed that:(1)The nail holding strength of the tangential section was the maximum,followed by that of the radial section,and that of the cross section was the minimum.(2)The nail holding strength of Masson pine was higher than that of Chinese fir.(3)The nail holding strength grew with the increase in the diameter of self-tapping screws,but a large diameter would lead to plastic cracking of the timber,thus further affecting the nail holding *** pine and Chinese fir reached the maximum nail holding strength when the diameter of self-tapping screws was 3.5 mm.(4)Under a large diameter of screws,prefabricated guiding bores could mitigate timber cracking and improve its nail holding strength.(5)Prefabricated guiding bores were more necessary for the screw connection of Masson *** results obtained could provide a scientific basis for the screw connection design of Masson pine and Chinese fir timber structures.

关键词： Masson pine Chinese fir self-tapping screws nail holding performance

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