Submerged arc welding, which is generally used for the corner joint of box-section columns, is a welding process with a high heat input. The influence on the strength and toughness of the heat-affected zone is an important concern, especially when used with a high-performance steel that may be more susceptible to heat input. The ductility of the welded corner joint is one of the important factors to ensure safety against external forces, such as during severe earthquakes. In this study, a series of material and cyclic loading tests of the corner joint comprising SA440C high-performance steel fabricated by submerged arc welding were conducted. The experimental results indicated that the welded corner joint comprising SA440C steel is ductile enough to dissipate input energy caused by the strong ground motion from an earthquake.

埋弧焊通常用于箱形截面立柱的角部接头，是一种具有高热量输入的焊接工艺。对热影响区的强度和韧性的影响是一个重要的考虑因素，尤其是在与可能更容易受热输入影响的高性能钢一起使用时。焊接角接头的延展性是确保抵抗外力（例如在强烈地震期间）的安全性的重要因素之一。在这项研究中，对由埋弧焊制造的SA440C高性能钢制成的角接头进行了一系列的材料和循环载荷试验。实验结果表明，由SA440C钢制成的焊接角接头具有足够的延展性，可以消散由地震引起的强烈地面运动引起的输入能量。