ABSTRACT
Prefabricated bridge members have standardized design, fabrication and assembly processes with predefined data delivery. This paper proposes a model-driven design for prefabricated bridge members considering the concept of DfMA(design for manufacture and assembly). Digital models of the prefabricated member need to have the data from manufacturing to operation stages, allowing for reliable evaluation of the structure’s performance. Based on the accumulated data, a baseline digital twin model can be defined enabling two-way interoperability with FE(finite element) analysis to manage key performance indicators of the members. As a pilot project, a prestressed concrete bridge was selected. The performance indicators are flexural cracking, which is determined by changes in stress conditions, and flexural strength by invisible corrosion of internal tendons. The proposed process was validated by testing 45-year old deteriorated PSC girders extracted from an existing bridge.
