This paper presents a structural analysis method for moment-rotation capacity evaluation of press-braked steel girders and its application. The material-properties may be affected significantly due to the press-braking manufacture. Since strain-hardening induced by press-braking generally reduces the moment-rotation capacity, such the effects have to be thoroughly reviewed. The effects of the cold-working on the material properties, geometric imperfections and residual stresses were properly included into the analytical modeling. A series of nonlinear analyses were conducted for the Z-section girder models with the SM490 steel plates of 24mm thickness by using the Newton-Raphson method and the modified Riks method provided by the ABAQUS.

• 최수영(한밭대학교 건설환경공학과 석사과정) | Su-Young Choi
• 이필구(RIST 포항산업과학연구원 강구조연구소 책임연구원) | Pil-Gu Lee
• 조광일(RIST 포항산업과학연구원 강구조연구소 책임연구원) | Kwang-Il Cho
• 최병호(한밭대학교 건설환경공학과 조교수) | Byung-Ho Choi