ABSTRACT
Prefabricated bridge members requires more strict quality management for easier assembly. Design for manufacturing and assembly(DfMA) has been started to be adopted for bridge structures. In this paper, digital engineering models are developed to consider these new requirements. Rule-based modeling is used to create the 3D geometry models which has automatic model update by geometry inspection data at the stage of fabrication, erection and completion of the assembly. Prestress and connections are essentially included in the prefabricated bridge. Designed values should be updated through quality inspection process. For preassembly check, data templates for prefabricated members are proposed and a pilot application is performed for a prestressed concrete bridge. Camber, lateral deformation, stress conditions are selected as key performance indices of the prestressed concrete girder. A simple sensing system is applied to the girder from the beginning of fabrication to the end of assembly. When the bridge is completed, the owner can have a baseline digital twin model of the bridge. Data and digital engineering models are delivered to the maintenance system.
