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Hayato Asada,Tsuyoshi Tanaka,Satoshi Yamada,Hiroaki Matoba 한국강구조학회 2014 International Journal of Steel Structures Vol.14 No.4
This Paper proposes a method to improve plastic deformation capacity of the welded wide flange beam-to-columnconnections in existing steel buildings by using supplemental H-section haunches jointed by high-strength bolts and weldingwhich expected to secure construction quality. By attaching supplemental haunches to upper and lower flanges of the beam end,the critical section is moved from the beam end to the beam cross-section corresponding to the tip of the supplemental haunch. As a result, it could prevent the fracture of beam flange initiated from toe of weld access hole. Cumulative plastic deformationcapacities of retrofitted specimens were 1.5 to 2.0 times larger than that of un-retrofitted specimen.