Parametric modelling for modular prefabricated bridges

Abstract

Standardized modular bridges improve the productivity of automation in design and fabrication in response to the variety of influence factors. In this study, optimized design models through the development process of a new structural system were constructed using Building Information Modeling (BIM) technologies. The models consider design specifications, constructability and optimized detailing. Parametric modeling was conducted to accommodate variation of each design values of the modular bridge structures such as bridge width, girder spacing and height of the pier. Each module by parametric modeling has fixed values, variables considering product specification and relationship between objects. For the connections between members, engineering knowledge is embedded in the 3D information models as parameter range of supper and lower limit and recommended default values. Using the parametric models, design productivity can be enhanced significantly in term of analysis, estimation and construction management.