STRUCTURE FOR WELDING STEEL STRUCTURE AND METHOD FOR WELDING STEEL STRUCTURE

摘要

PROBLEM TO BE SOLVED: To restrain the rising of hardness of a base material and to prevent the brittle breakage of a main steel structural material as much as possible by weld-joining the main steel structural material and a secondary member or a preliminary steel-made member under condition of lower strength than the main steel structural material. ;SOLUTION: The welding structure of the steel structural material is used to a general used steel material as the main steel structural material and a metal having lower strength than the main steel structural material as a welding material, and the welding material is fused and alloyed and solidified under inert gas atmosphere with arc heat by using TIG welding or MIG welding feeding the inert gas. In short, at the time of weld-joining the secondary member 2 to the main steel structural material 1 at lower strength than the main steel structural material 1, in the case of acting the outer force of earthquake, etc., since the rising of the hardness in a heat affected zone causing to the brittle breakage of the main steel structural material 1, stress concn. and strain concn. to the main steel structural material 1 can be reduced, the brittle breakage at the starting point of the weld-joined part 3 of the secondary member 2 in the main steel structural material 1 can be restrained as much as possible.;COPYRIGHT: (C)1999,JPO