A rational design approach for prestressed-concrete-girder integral bridges

摘要

This paper presents a rational design approach for prestressed-concrete-girder integral bridges. An analysis procedure and simplified analytical models are proposed for the design of integral bridges. The proposed design methodology is developed considering the actual behavior of integral bridges and load distribution among their various components. The methodolgoy recommends the analysis of itnegral bridges for each construction stage. The earth pressure forces actign on integral bridge abutments are formulated in correlation with the effects of temeprature variation. Some important design considerations for various integral bridge components are also highlighted. Thue benefits of using the proposed analysis method for the design of integral bridges are discussed. It was concluded that it may be possible to obtain more sound and economical designs for itnegral bridges using the proposed design method.