Out-of-plane gusset welded joint and fabrication method thereof

Abstract

Provided is a fabrication method of an out-of-plane gusset welded joint which is provided with a base plate, a gusset plate projecting from the surface of the base plate, and a fillet weld. In the fabrication method, an end of the gusset plate in the plate width direction at an end in the longitudinal direction is cut away in the plate width direction (w) to form a cut-away portion; the gusset plate is arranged on the surface of the base plate and fillet welding is performed so that an intended leg length d2 on the gusset plate side is not less than the height (a) of the cut-away portion to form a fillet weld in which the leg length d2' on the gusset plate side is not less than 1 / 3 of the thickness t2 of the gusset plate, and the leg length d2', the leg length d1' on the base plate side, the penetration length x', and the penetration angle theta' satisfy x' + d1' > d2' / sin theta'; and, at least the toe of the boxing weld portion of the fillet weld on the base plate side is subjected to an impact treatment to improve the fatigue properties.

Description

technical field [0001] The invention relates to an out-of-plane gusset welded joint for welding two plate parts by fillet welding and a method for making the same. In particular, it relates to an out-of-plane gusset welded joint with excellent fatigue resistance and a manufacturing method thereof. Background technique [0002] In order to reinforce the plate part of the structure or install the plate part of the structure on other parts (for example, other plate parts), on the plate part of the structure, as an accessory part, a Way fillet welds are installed with other plate components to form out-of-plane fillet welded joints. [0003] It can be seen that when repeated stress is applied to the welded joint, for example, due to the occurrence of significant stress concentration at the welded end or the formation of tensile residual stress at the welded end, fatigue cracks are generated from the welded end , the fatigue resistance properties decreased significantly. [00...

AI Technical Summary

Problems solved by technology

However, in the case of full penetration welding, beveling needs to be performed in a wide range, and the time required for the welding operation is long, and it is difficult to limit the gusset plate at the time of pre-welding of the gusset plate.

Therefore, the burden on the welding operation is large and the cost increases

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