교량의 생애주기비용 최적설계 = Optimal Life Cycle Cost Design of a Bridge

다국어 초록 (Multilingual Abstract)

The importance of the life cycle cost (LCC) analysis for bridges has been recognized over the last decade. However, it is difficult to predict LCC precisely since the costs occurring throughout the service life of the bridge depend on various parameters such as design, construction, maintenance, and environmental conditions. This paper presents a methodology for the optimal life cycle cost design of a bridge. Total LCC for the service life is calculated as the sum of initial cost, damage cost, maintenance cost, repair and rehabilitation cost, user cost, and disposal cost. The optimization method is applied to design of a bridge structure with minimal cost, in which the objective function is set to LCC and constraints are formulated on the basis of Korean Bridge Design Code. Initial cost is calculated based on standard costs of the Korea Construction Price Index and damage cost on damage probabilities to consider the uncertainty of load and resistance. Repair and rehabilitation cost is determined using load carrying capacity curves and user cost includes traffic operation costs and time delay costs. The optimal life cycle cost design of a bridge is performed and the effects of parameters are investigated

참고문헌 (Reference)

1 O.J. Koskito, "Reliability based optimization of plant precast concrete structures" ASCE 123 : 298-304, 1997

2 A. Haldar, "Probability, Reliability and Statistical Methods in Engineering Design" John Wiley & Sons 2000

3 E. Rosenblueth, "Optimum reliabilities and optimum design" 3 : 69-83, 1986

4 신영석, "Optimal Design of a Steel Box Girder Bridge Considering Life Cycle Cost" 대한토목학회 13 (13): 433-440, 2009

5 H. Hugh, "NCHRP REPORT 483 - Bridge Life-Cycle Cost Analysis" Transportation Research Board of the National Academies 2003

6 Korea Infrastructure Safety and Technology Corporation, "Method for extension of service life of road bridges, Final report to Korea Road & Transportation Association" 2000

7 C.F. Berthelot, "Mechanistic probabilistic vehicle operating cost model" ASCE 122 : 337-341, 1996

8 S.Y. Bojidar, "Maturing management for aging bridges" 2000

9 H.M. Koh, "Life-cycle cost minimization of bridges with earthquake damage estimation" 1131-1135, 2001

10 D.M. Frangopol, "Life-cycle cost design of deterioration structures" ASCE 123 : 1390-1401, 1997

11 Korea Road & Transportation Association (KRTA), "Korean Bridge Design Code"

12 J.R. Kayser, "Capacity loss due to corrosion in steel girder bridges" ASCE 115 : 992-1006, 1989

13 J. De Brito, "Bridge management policy using cost analysis" 431-439, 1995

14 Korea Infrastructure Safety and Technology Corporation, "An enhanced strategy for infra facilities safety management system based on LCC concept, Final report to Korea Road & Transportation Association" 2001

15 박장호, "AHP 기법을 이용한 교량상부구조의 VE 검토" 한국안전학회 24 (24): 79-85, 2009