抄録
It is suggested asymmetry detail which has the non-scallop (access hole) method for upper side and the reinforcement welding around toe of the scallops for lower side of the beam. The purpose is to develop the detail and joint method has easiness to product and high capacity of plastic deformation suitable for on-site. In addition, new developed backing-less method which is overhead welding and overlay using the special consumable was combined instead of the backing plate which is jointed to groove bottom of the end of beam flange. Full-size beam-to-column assemblies applied these methods had high capacity of plastic deformation. This improvement mechanism is regard as reduction stress concentrations and controls of these balances by shape of overlay metal formed by arc welding. As the leg length of reinforced weld become increase, strain ratio of outer against center become decrease in the groove weld width of the beam end.
