Influence of number of layers on embedment strength of dowel-type connections for glulam and cross-laminated timber
Influence of number of layers on embedment strength of dowel-type connections for glulam and cross-laminated timber
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DOI：
10.1016/j.engstruct.2018.09.005
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发表时间：
2018-09
影响因子：
5.5
通讯作者：
Eero Tuhkanen;J. Mölder;G. Schickhofer
中科院分区：
文献类型：
--
作者：
Eero Tuhkanen;J. Mölder;G. Schickhofer
本文的目的是提供一个更好的了解嵌入行为的榫钉型紧固件在层积材。本文通过试验研究和讨论了胶合板（GLT）和交叉层积材（CLT）中层板数量和厚度对嵌固强度的影响。通过对厚度、密度等参数相同的试件进行全孔嵌固压缩试验，结果表明，嵌固强度受较薄的交叉层的锁固效应影响。此外，交叉层的致密化-硬化效应-是明显的，并导致更高的嵌入应力和强度在较大的销钉位移。本文给出了刚度值，但未进行讨论。将埋置强度值与众所周知的经验模型进行比较，结果表明GLT具有良好的一致性。相比之下，CLT的结果远低于现有模型计算的值，并在paper.The调查结果是重要的，提供一个安全和有效的连接，以实现更有效地使用CLT产品。
The purpose of this paper is to provide a better understanding of the embedment behaviour of dowel type fasteners in laminated timber. The influence of the number and thickness of the lamellas on embedment strength in glued laminated timber (GLT) and cross-laminated timber (CLT) is experimentally investigated and discussed. Full hole embedment tests in compression were conducted with specimens of equal properties (thickness, density), only with changes in the investigated parameter.The results show the embedment strength in CLT is influenced by locking effect of thinner crossed layers. In addition, the densification of crossed layers—the hardening effect—is clearly pronounced and leads to higher embedment stresses and strengths at larger dowel displacements. Stiffness values are presented in this paper but not discussed.The comparison of embedment strength values with well-known empirical models showed good agreement for GLT. In contrast, the results for CLT were far below the values calculated with existing models and are discussed in the paper.The findings are important to provide a safe and efficient joint to achieve more efficient use of CLT products.