This study numerically investigates buckling behavior of press braked steel plates with a free edge. In order to improve structural stability during construction, the top flanges of press-braked U section girder are laterally braced by the installation of prefabricated half-deck. Thus, an unbraced length is taken as the longitudinal spacing of pockets on the half-deck, which are to make composite section. This study performed 3D finite element analyses to evaluate an equivalent effective width of cold-formed flange with a free edge. Through the parametric numerical analyses, the elastic buckling stresses of the cold-formed flanges with rounded corner in the cross-section were compared with those of general flat plates. Then, the equivalent effective width of the cold-formed (press-braked) flanges were numerically examined for some representative cases.

ABSTRACT
 1. 서론
 2. 수치해석 모델링
 3. 해석 결과 및 분석
 4. 결론
 References

• 김태봉(한밭대학교 토목공학과) | Kim Tae-Bong
• 김정원(한밭대학교 토목공학과) | Kim Jung-Won
• 최병호(한밭대학교 건설환경공학과) | Choi Byung H.