ABSTRACT

The increasing popularity of cross-laminated timber (CLT) provides opportunities to extend the use of wood beyond traditional low-rise residential construction. For the high-performance material CLT to achieve its full utilisation, adequate joining techniques are required. With that in mind, while glued-in rods (GiR) are a powerful technical solution for numerous timber engineering applications, with proofed performance in solid wood, only few studies are available on the performance of GiR connections in CLT. Critical research gaps exist regarding the performance of multiple GiR, which this paper suggest to fill. Herein, experimental investigations on the performance of multiple GiR in CLT are presented. Steel rods of diameter d = 12.7 mm were glued-into CLT panels with two anchorage lengths (10d and 18d), three numbers of rods (1, 2 and 3), and two spacings between rods (s = 4d and 6d). In total, 10 test series with 5 replicates, thus 50 specimens, were manufactured and subsequently tested under uni-axial quasi-static monotonic tension. The results, assessed in terms of load-carrying capacity, demonstrated that GiR in CLT offer an alternative high-performance timber connection, and allows for more insights relating load capacity to the number, the anchorage length, and the spacing between rods.

摘要

交叉层压木材 (CLT) 的日益普及提供了将木材的使用扩展到传统低层住宅建筑之外的机会。为了使高性能材料 CLT 充分利用，需要足够的连接技术。考虑到这一点，虽然胶合杆 (GiR) 是适用于众多木材工程应用的强大技术解决方案，并且在实木中具有经过验证的性能，但关于 CLT 中 GiR 连接性能的研究很少。关于多个 GiR 的性能存在关键的研究空白，本文建议填补这些空白。本文介绍了对 CLT 中多个 GiR 性能的实验研究。直径d = 12.7 mm 的钢棒被胶合到具有两个锚固长度（10 d和 18 d )、三个杆数 (1、2 和 3)，以及杆之间的两个间距 (s = 4 d和 6 d )。总共制造了 10 个具有 5 个重复的测试系列，因此 50 个试样，随后在单轴准静态单调张力下进行测试。根据承载能力评估的结果表明，CLT 中的 GiR 提供了一种替代的高性能木材连接，并允许更多地了解承载能力与数量、锚固长度和杆之间的间距。