鋼材および突合せ溶接接合部のエネルギー吸収能力について

抄録

The energy absorbing capacity is one of the most significant factors to assess aseismic safety of the member and the subassemblage in the steel structure. This paper deals with the energy absorbing capacities of several grade base metals and their butt welded joints at the steady states which are defined as the states when the number of cycles arrive at about 20 % cycles to failure. From the quantitative expression of energy absorbing capacity per cycle, it has made clear that the energy absorbing capacity in the nondimensional form does not indicate distinctive differences among the structural steels and their butt welded joints, although the cyclic stress-strain curves are affected by the tensile strength of individual base metals. Also, the characteristics of the hysteresis loops are examined in comparison with the cyclic stress-strain curves from the viewpoint of the energy absorbing capacity. It has been concluded that the hysteresis loop shapes of the high strength steels and their butt welded joints are difficult to estimate directly from the cyclic stress-strain curves.