Effects of Different Combination Forms of Inclined Self-Tapping Screws with Two Angles on Shear Performance of Steel-to-Cross-Laminated Timber

被引：0
作者：
Chen Z. [1 ]
Wang S. [1 ]
Wang X. [1 ]
Zhang L. [1 ]
Zhou B. [1 ]
Huang H. [2 ]
Que Z. [1 ]
机构：
[1] College of Materials Science and Engineering, Nanjing Forestry University, Nanjing
[2] Institute of Forest Products Industry, Jiangxi Academy of Forestry, Nanchang
来源：
Linye Kexue/Scientia Silvae Sinicae | 2022年 / 58卷 / 03期
关键词：
Cross-laminated timber(CLT); Inclined self-tapping screws; Shear capacity; Steel plate;
D O I：
10.11707/j.1001-7488.20220317
中图分类号：
学科分类号：
摘要：
【Objective】This study was implemented to make a kind of steel-to-cross-laminated timber joint connected by self-tapping screws, and to explore the influences of different combinations on the mechanical properties of the joint. Based on the comparison between the existing theoretical models and the experimental values, the calculation model was optimized. 【Method】Six groups of shear tests with different combinations were carried out for self-tapping screws with angles of 45° and 90° by changing the screw tapping angles and combination forms, and loaded at a uniform speed of 1 mm•min-1 according to the American standard ASTM D1761-12. The failure modes of the joints subjected to shear were recorded and analyzed, and the load-displacement curves, load-carrying capacity, stiffness and energy dissipation of each specimen were compared. 【Result】The main failure modes of the specimens were two screws cut off at the same time, the screws not cut off but plastic hinges produced, and the screws not cut off but pulled out at the same time. For all the 6 groups, there was a failure mode in which one side of the screws were cut off. In addition, there was a failure mode in which the screws for the group J-Cross45°T and S-Double45°T were pulled out instead of being cut off, and in group S-45°T-45°C there was a failure mode in which plastic hinges were produced instead of being cut off. In this test, the load-carrying capacity and stiffness of groups J-Cross45°T, J-Double45°T were S-Double45°T were much higher than those of groups S-45°T-45°C, S-90°-45°C and S-90°-45°T.The displacement corresponding to energy dissipation and load-carrying capacity of group S-90°-45°C was the maximum.【Conclusion】Among the 6 groups of specimens, Group S-Double45°T might have the best comprehensive mechanical performance, while group S-90°-45°C could be suitable for the joints with high seismic requirements in the building. © 2022, Editorial Department of Scientia Silvae Sinicae. All right reserved.
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页码：159 / 166
页数：7
相关论文
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