| 摘要 |
PROBLEM TO BE SOLVED: To provide a thickness increased steel beam constituting the end of a thickness increase steel beam with a material integral with a beam base metal, improving the productivity for manufacturing the thickness increased steel beam and reducing the construction term and the cost, and to provide a machining method for the beam end. SOLUTION: In this thickness increased steel beam 2, a beam end 7 is formed into a thickness increased shape inclined toward the base metal side, the thickness increased steel beam is constituted of H sectional member, a flange of the beam end is enlarged in the beam axis direction corresponding to the moment distribution so as to increase thickness of the flange 8 of the beam end and a web 9. The flange of the beam end has the length of 1/2 or more of the beam depth and has increased thickness set by the proof stress of the base metal at a plastic deformation point and the length of increased thickness part. The machining method for the thickness increased steel beam is characterized by molding the increased thickness of the beam end by high frequency induction heating.
|
