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 (경북대학교 토목공학과) ;
  • 김기욱 (경북대학교 방재연구소)
  • Published : 2004.09.01


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.


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