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Influence of the bonding of rebar dowel with adhesive on wood–concrete composite specimens
Proceedings of the Institution of Civil Engineers - Structures and Buildings ( IF 1.6 ) Pub Date : 2020-11-20 , DOI: 10.1680/jstbu.19.00058
Julio Cesar Molina 1 , Carolina Aparecida Barros Oliveira 2 , André Luís Christoforo 3 , Daniel Villas Bôas 4 , Carlito Calil Junior 5
Affiliation  

Ensuring the quality of the connector used in wood–concrete composite systems is a critical factor affecting the performance of the system. The main objective of this research was to study the strength and stiffness of wood–concrete composite specimens with two types of rebar dowel connectors: fixed to the wood (solid timber) using epoxy adhesive and by pre-drilling on smaller diameter holes in the wood (without the use of adhesive). In the composition of the test specimens, rebar dowels of 12·7 mm dia. were used. The strength and stiffness of the connectors were determined by double shear tests, performed on composite specimens. Statistical analysis was used to compare the results obtained and regression models were proposed for estimating the stiffness parameters of the connections. The connectors glued with epoxy adhesive provided better strength and stiffness for the composite specimens when compared to the connectors fixed to the wood by pre-drilling. The differences between the strength and stiffness of the connection systems analysed were statistically significant. The regression models proposed presented a good approximation for the estimation of the Kser and Ku slip moduli of the composite specimens analysed.

中文翻译:

钢筋销钉与粘合剂的粘结对木混凝土复合材料试样的影响

确保用于木材-混凝土复合系统的连接器的质量是影响系统性能的关键因素。这项研究的主要目的是研究带有两种类型的钢筋销钉连接器的木材-混凝土复合材料样本的强度和刚度:使用环氧树脂粘合剂固定在木材(固体木材)上,以及在木材中较小直径的孔上预先钻孔(不使用粘合剂)。在试样的组成中,使用直径为12·7毫米的钢筋定位销。被使用。连接器的强度和刚度通过对复合材料样品进行的双剪切测试确定。使用统计分析来比较所获得的结果,并提出了回归模型来估计连接的刚度参数。与通过预钻孔固定到木材上的连接器相比,用环氧树脂胶粘的连接器为复合材料样品提供了更好的强度和刚度。分析的连接系统的强度和刚度之间的差异具有统计学意义。所提出的回归模型为估计模型提供了很好的近似值。分析了复合材料试样的K serK u滑模。
更新日期:2020-11-21
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