Conceptual and parametric design of steel bridges

Greater challenges are being faced by engineers in modern bridge design to seek the optimal solution. This is due to the increasing structural complexity of steel bridges being demanded by higher client expectations, while there remains the need for the designs to be economic. The authors have developed a framework of parametric design practice which enables common bridge types to be rapidly modelled and compared. The benefits of parametric design and modelling for steel bridge design is first addressed with a primary focus on conceptual design, including a discussion on different structural forms and the components of parametric design. Furthermore, an innovative digital design workflow is promulgated for reducing design effort and increasing the coordination efficiency in an integrated design platform. A case study of a suspension footbridge concept design in Otago, New Zealand is presented which demonstrates the application of the parametric design workflow.