Full-penetration butt welds are often specified to connect the beam flanges to the column flange in welded moment resisting connections. Partial-penetration butt welds are cheaper than full-penetration butt welds and also more cost effective when compared to large fillet welds. EN 1993-1-8 standard includes a definition of an “effective full penetration of T-butt welds” implying that it can be used to replace butt welds leading to cost savings. This study evaluates the seismic performance of welded beam-to-column connections using effective full penetration of T-butt welds. Three full-scale T-shaped specimens were tested under cyclic loading. The results demonstrate that the effective full-penetration butt welds work very well under seismic loading, forcing the failure mode into the beam and enabling considerable energy to be dissipated within the beam plastic hinge, with no failure in the beam to column welds. Mock-up specimens were fabricated under real workshop conditions to examine the feasibility of reliably fabricating the weld penetration profiles required by EN 1993-1-8. This paper makes recommendations to the use of “equivalent strength” partial-penetration butt welds that can be used by the designer and/or fabricator to replace full-penetration butt welds.

中文翻译：

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T型对接焊缝在焊接力矩连接中的有效全焊透使用

通常采用全渗透对接焊，以抗弯矩的方式将梁式法兰连接到立柱法兰上。与大型角焊缝相比，部分渗透对接焊比全渗透对接焊便宜，而且成本效益更高。EN 1993-1-8标准包括对“ T形对接焊缝的有效完全渗透”的定义，这意味着它可用于替代对接焊缝，从而节省了成本。这项研究使用T型对接焊缝的有效全熔透性来评估焊接的梁对柱连接的抗震性能。在循环载荷下测试了三个完整的T形试样。结果表明，有效的全穿透对接焊缝在地震荷载作用下效果很好，迫使失效模式进入梁，并允许在梁塑料铰链内耗散大量能量，而梁至柱焊缝没有失效。在真实的车间条件下制造样机样品，以检验可靠制造EN 1993-1-8要求的焊缝熔深曲线的可行性。本文对使用“等效强度”的部分渗透对接焊缝提出了建议，设计者和/或制造商可以使用该焊缝代替全渗透对接焊缝。