Analysis Study on Fracture of Beam-to-Column Welded Connection with non-scallop methods by nonlinear fracture mechanics

Research Project

Project/Area Number	06650621
Research Category	Grant-in-Aid for General Scientific Research (C)
Allocation Type	Single-year Grants
Research Field	Building structures/materials
Research Institution	Shinshu University
Principal Investigator	NAKAGOMI Tadao Shinshu University, Faculty of Engineering, Prof., 工学部, 教授 (60111671)
Project Period (FY)	1994 – 1995
Project Status	Completed (Fiscal Year 1995)
Budget Amount *help	¥2,400,000 (Direct Cost: ¥2,400,000) Fiscal Year 1995: ¥700,000 (Direct Cost: ¥700,000) Fiscal Year 1994: ¥1,700,000 (Direct Cost: ¥1,700,000)
Keywords	nonlinear fracture mechanics / non-scallop method / J integraiion / safety to the earthquake / toughness of steel / charpy value / J積分 / シャルピー値
Research Abstract	Scallops of the beam-web at welded beam-to-column connections of steel frames bring partial loss of cross sections at the part subjected to large bending moments when a severe earthquake occurs. Therefore, they are not desirable from the point of view of mechanical behavior. This report presents the bending tests performed using specimens of beam-to-column joints on shop assembling carried out to investigate the effect of non-scallop methods and beam-scallops on fracture behavior, ultimate strength and deformation capacity of the steel beam-ends. It is concluded that a beam without scallops has earlier brittle fracture and higher strength, and larger deformation capacity than a conventional beam with scallops. Finally, it recommends the details of the end of the beam of the non-scallop method of construction with the cost performance being based from the view point of the design, the building.