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

This paper presents a rational design approach for preshessed-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 methodology recommends the analysis of integral bridges for each construction stage. The earth pressure forces acting on integral bridge abutments are formulated in correlation with the effects of temperature variation. Some important design considerations for various integral bridge components are-also highlighted. The 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 integral bridges using the proposed design method,