프리트스레스를 단계적으로 도입하는 PSC I형 거더의 설계에 관한 연구

A Study on the Design Meghod for PSC I Girders with additional Prestress

It is required efficient section shape like bulb-tee girders with high strength concrete to construct long span bridges economically. However, the trpical design method for PSC I-girders include bulb-tees, the concrete girder prestressed only one time at same time. But in this paper, new design method prestress increases as each load-stress stage. The incrementally prestressed concrete (IPC) girders can reduce the required area of grider section and extend span length by additional prestress. So it is able to construct long span bridges economically by using IPC girders.