A Study on the Design of Two-Span Continuous P.S. Composite Bridges

2경간 P.S. 연속합성보 교량의 설계에 관한 연구

A construction method for continuous prestressed Composite Bridges(PCB's) is developed and successfully applied to the design of two-span continuous PCB's of five different span lengths. The construction of continuous PCB's goes through 17 different loading conditions. for each loading condition, the allowable stress design method is used to determine section properties. The analytical results of two-span continuous PCB's arc compared with those of simple PCB's. The comparison shows that the use of the proposed method can reduce 10-15 percents of the concrete section area and approximate 28 percents of the steel section area, as well as 5-8 percents of the girder height. The study indicates that the use of the proposed PCB's method can significantly reduce construction and maintenance costs of bridges.