The eccentricity between connected steel parts and the anchor rods in base-plate T-stub connections makes base plates the weaker components in tension and compression. Additionally, the oversized holes in base plates lead to irregular placement of anchor rods, resulting in an unsymmetrical shear behavior. Thus, this paper aims to develop a special all-round fillet weld to connect the anchor rods beneath the base plate concentrically to the steel part, removing the base plate from the load-transferring chain. Accordingly, design criteria were first developed based on Eurocode's directional method considering all the potential failure modes. Next, results were validated by conducting experimental work. The digital image correlation technique (DIC) was also used to capture the strain distribution developed over the tested specimen till failure. Consequently, numerical analysis was carried out to investigate the fracture strength and the fracture angle and compare the special fillet weld with its equivalent standard one, which has the same weld volume. The results indicated that the proposed design criteria produced safe strength prediction for the developed special all-round fillet weld. Furthermore, the results revealed that using a special all-round fillet weld instead of the equivalent standard one can increase the strength by about 8% and improve the ductility of the weld. However, it decreases the stiffness of the weld by about 21%. The fracture surface occurred at from the face of the anchor rod, which produced a higher strength than the predicted tensile strength calculated according to the theoretical throat plane.

中文翻译：

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用于底板 T 形短管连接锚杆的特殊全方位角焊缝

底板 T 形短管连接中的连接钢部件和锚杆之间的偏心使得底板成为拉伸和压缩方面较弱的部件。此外，底板上的过大孔会导致锚杆放置不规则，从而导致不对称的剪切行为。因此，本文旨在开发一种特殊的全方位角焊缝，将底板下方的锚杆同心连接到钢部件，从而将底板从载荷传递链中移除。因此，设计标准首先基于欧洲规范的定向方法制定，考虑了所有潜在的故障模式。接下来，通过进行实验工作来验证结果。数字图像相关技术 (DIC) 还用于捕获测试样本上直至失效为止的应变分布。因此，进行了数值分析，研究了断裂强度和断裂角度，并将特殊角焊缝与具有相同焊缝体积的等效标准角焊缝进行了比较。结果表明，所提出的设计标准为所开发的特殊全方位角焊缝提供了安全强度预测。此外，结果表明，使用一种特殊的全方位角焊缝代替等效标准角焊缝可以将强度提高约8%，并提高焊缝的延展性。然而，它使焊缝刚度降低了约 21%。断裂面发生在从锚杆的表面，产生的强度高于根据理论喉部平面计算的预测抗拉强度。