PROBLEM TO BE SOLVED: To improve fatigue characteristics of a portion in which actuation of an excessive compressive load is supposed during usage of a structure having a weld joint between a main plate and an auxiliary plate.SOLUTION: A structure has a weld joint 3 between a main plate 1 and an auxiliary plate 2, a yield strength of a weld metal 3 forming the weld joint 3 is 1.2 times or more of that of surrounding steel material 4, a yield strength of the main plate 1 on a region W of three times or more of a plate thickness t of the main plate of the side opposite to the weld metal from a toe of the weld joint 3 is 1.5 times or more of that of the surrounding steel material 4, a toe angle θ on a region L of 1/3 times or more of the plate thickness t of the main plate to the welded metal side from a toe of the weld joint 3 is 20° or less and a striking mark having the curvature radius R being 1/20 or more of the plate thickness t of the main plate and the depth D being 1 mm or less is formed on a difference part of the welding on the region L.
【課題】主板と副板との溶接継手を有する構造物の使用中に、過大な圧縮負荷の作用が想定される部位の疲労特性を高める。【解決手段】主板1と副板2との溶接継手3を有する構造物であって、溶接継手3を形成する溶接金属3の降伏強度が周囲の鋼材4の1.2倍以上であり、上記溶接継手3の止端から溶接金属と逆側に主板板厚tの3倍以上の領域Wにおける主板1の降伏強度が周囲の鋼材4の1.5倍以上であり、上記溶接継手3の止端から溶接金属側に主板板厚tの1/3以上の領域Lにおける止端角度θが20度以下であり、上記領域Lにおける溶接の段差部に、曲率半径Rが主板板厚tの1/20以上、深さDが1mm以下の打撃痕が形成されている。【選択図】図1
STRUCTURE EXCELLENT IN FATIGUE CHARACTERISTIC
疲労特性に優れた構造物
2015-12-21
Patent
Elektronische Ressource
Japanisch
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