A Proposal for an Evaluation of Flexural Resistance of Longitudinally Stiffened Plate Girder with Slender Web

수평보강재로 보강된 세장 복부판을 갖는 플레이트 거더의 휨강도 평가 방법의 제안

  • Park, Yong Myung (Department of Civil Engineering, Pusan National University) ;
  • Lee, Kun Joon (Department of Civil Engineering, Pusan National University) ;
  • Choi, Byung Ho (School of Civil and Environmental Engineering, Hanbat University) ;
  • Back, Sung Yong (School of Civil and Urban Engineering, Inje University)
  • 박용명 (부산대학교 토목공학과) ;
  • 이건준 (부산대학교 토목공학과) ;
  • 최병호 (한밭대학교 건설환경공학과) ;
  • 백성용 (인제대학교 토목도시공학부)
  • Received : 2014.02.05
  • Accepted : 2014.03.31
  • Published : 2014.04.27


In this paper, a series of numerical analyses were performed to evaluate the flexural resistance of steel plate girder with longitudinally stiffened and slender web. The SM490 steel was adopted for the study and the flexural resistances evaluated from the numerical analysis were compared with those suggested by the AASHTO LRFD and the Eurocode 3 codes, respectively. It was found that the AASHTO LRFD code could considerably underestimate the flexural resistance as the web slenderness becomes smaller. This comes from the fact that current AASHTO LRFD code does not consider a possible increase of slenderness limits for compact and noncompct web, and also an additional effect of web restraint on the rotation of compression flange in longitudinally stiffened web. Therefore, the slenderness limits of web and flange have been newly proposed for the plate girders with longitudinally stiffened web and it is analytically verified that the flexural resistance can be appropriately estimated by applying the proposed slenderness limits to the AASHTO LRFD code.


Supported by : 한국건설교통기술평가원


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  1. Experiments on Flexural Resistance of Longitudinally Stiffened Plate Girder with Slender Web vol.26, pp.6, 2014,