The Section Optimization of Prestressed Concrete Box Girder Bridges

프리스트레스트 콘크리트 박스 거더 교량의 단면최적화

  • 노금래 (성균관대학교 토목공학과 대학원) ;
  • 김만철 (한국과학기술원 Post Doctor 과정) ;
  • 박선규 (정회원, 성균관대학교 토목공학과) ;
  • 이인원 (정회원, 한국과학기술원 토목공학과)
  • Published : 1998.10.01

Abstract

The program which could determine cross-sectional dimension of the prestressed concrete box girder bridges at the stage of preliminary design was developed using the optimal technique in this study. It could minimize the cost required in the design of box girder bridges and the construction with the full staging method. Objective cost function consisted of six independent variables such as height of cross-section, jacking force and thickness of web and bottom flange. The SUMT(Sequntial Unconstrained minimization Technique) was used to solve the constrained nonlinear minimization optimal problem. Using the program developed in this study, optimum design was performed for existing bridges with one cell cross section of constant depth. The result verify the compatibility of the program.

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