Optimum Design of PSC Box Girder Bridge considering the Influence of Unequal Span Length Division, Load Factor, and Variable Girder Depth

부등 경간 비율, 하중계수 및 변단면의 영향을 고려한 PSC 박스 거더교의 최적설계

  • 박문호 ;
  • 김기욱
  • Published : 2004.09.01

Abstract

This research automatically designed psc-box girder bridges by using an optimum design program and applied the results to the various types of bridges to verify if common facts used in steel bridges or concrete bridges can be applied to PSC bridges. Namely, it investigated appropriate unequal span length division by comparing with bridge of unequal and equal span length division, and verified the influence of the load factors which are changed by time or specification applying the results to various types of bridge. and it applied reinforced concrete bridge and steel bridge's variable girder depth which is slender and effective to save material costs to PSC box girder bridges. Technical solution of optimum design program used SUMT procedure, and Kavlie's extended penalty function to allow infeasible design points in the process. Powell's direct method was used for searching design points and a gradient's approximate method was used to reduce the design time.

Keywords

optimum design;PSC box-girder bridge;SUMT;total cost

References

  1. 박문호, 조효남, 류연선,'구조물의 최적설계', 한국전산구조공학회 단행본, 서울, 1991, p.366
  2. 허택녕, '전산구조해석', 엔지니어즈, 서울, 1994, p.342
  3. 건설부. '콘크리트 교량 가설 특수공법 설계․시공․유지관리 지침', 서울, 1994, p.928
  4. 건설교통부 '콘크리트 표준 시방서' 편집부, 서울, 1996-2003. p.530
  5. 건설교통부 '도로설계편람', 한국건설기술연구원, 경기도, 2001, p.1820
  6. 김기욱, 'FCM 공법 PSC 박스거더교의 최적설계', 공학박사 학위논문, 경북대학교, 2002, p.211
  7. AASHTO 'Standard Specifications for Highway Bridges', Interim Specifications. The American Association of State Highway and Transportation Officials 1977-1992, p.1400
  8. Kavlie,D,. and Moe, J., 'Automated Design of Frame Structures.' ASCE Journal, Structural Division, Vol. 97 No. St1, 1971, pp.33-62
  9. 건설교통부 '도로교 설계기준․해설' 기문당, 서울, 1992-2003. p.770
  10. C. Menn 'Prestressed Concrete Bridges' Birhauser Verlag, Boston, 1990. p.535