Embedment strength of dowels in wood specimens according to ABNT NBR 7190 (1997) and EUROCODE 5 (2004)

Abstract The study of connections for timber structures has been the subject of intense research in Brazil. This work aimed to study the embedment strength of connections made by steel pins (dowels) in specimens of reforested woods. Analytical and experimental evaluations were considered in this study. Initially, tests on specimens made from Pinus elliottii (Class C30) and Eucalyptus salligna (Class C50) woods with dowels, type 1020, with diameter of 6.35 mm (1/4") were performed. The tests were performed according to the ANBT NBR 7190 (1997) and Eurocode 5 (2004) Standards with subsequent comparison between the analytical and experimental results for embedment strengths. The values of the embedment strength showed that the Eurocode 5 (2004) Standard had greater agreement between experimental and analytical results when compared to the results of the ABNT NBR 7190 (1997) Standard.摘要 木结构连接节点的研究一直是巴西学界的重点研究课题。本研究旨在探究人工林木材试件中钢销钉（dowels）连接的嵌入强度（embedment strength），研究同时采用分析与实验两种评估手段。初期，研究人员针对采用1020型钢销钉（直径6.35mm，即1/4"）制作的湿地松（C30等级）与亮果桉（C50等级）木材试件开展实验测试，测试严格遵循巴西标准协会（ABNT）的NBR 7190 (1997)与欧洲规范5（Eurocode 5）:2004标准，随后对嵌入强度的分析结果与实验结果进行对比分析。嵌入强度的数值对比结果显示，相较于ABNT NBR 7190 (1997)标准，欧洲规范5（Eurocode 5）:2004与实验结果的吻合度更高。