The design of dowelled connections for timber structures based on the Brazilian standard NBR 7190 results in an excessive number of fasteners due to the low value obtained for the wood embedding strength when using the calculation model proposed by the standard. The main objective of this research was to study, experimentally and analytically, the embedding strength of Brazilian reforestation woods according to US and European standards (ASTM D 5764 and EN 1995-1-1:2004) in order to propose a better embedding model for the Brazilian norm for wooden structures. Test specimens were made using Pinus elliottii (softwood) and Eucalyptus saligna (hardwood) and steel fasteners of diameter 6.35 mm. For P. elliottii, the experimental values of embedding strength obtained using D 5764 approached the analytical values. However, for E. saligna, the analytical embedding strengths obtained using D 5764 were higher than the experimental embedding strengths. The model proposed by the European standard proved to be more suitable for obtaining the wood embedding strength. For the European standard, smaller dispersions of data that relate wood density to embedding load were obtained, indicating the better accuracy of the European model.

中文翻译：

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巴西木材的包埋强度和对巴西标准的推荐

基于巴西标准NBR 7190的木结构榫眼连接设计导致紧固件数量过多，原因是使用该标准提出的计算模型时，木材嵌入强度值较低。这项研究的主要目的是根据美国和欧洲标准（ASTM D 5764和EN 1995-1-1：2004），通过实验和分析方法研究巴西造林木材的包埋强度，以便为巴西的木结构规范。使用椭圆松（软木）和桉木（硬木）以及直径为6.35毫米的钢制紧固件制成试样。对于P. elliottii，使用D 5764获得的包埋强度实验值接近分析值。但是，对于s。saligna，使用D 5764获得的分析包埋强度高于实验包埋强度。欧洲标准提出的模型被证明更适合于获得木材的嵌入强度。对于欧洲标准，获得了较小的数据散度，这些数据将木材密度与包埋载荷相关联，表明欧洲模型的精度更高。