Application of flipped learning to the life cycle assessment of a composite pedestrian bridge

Abstract

[EN] This study describes the introduction of the life cycle assessment methodology to a postgraduate course through a flipped classroom. The analysis was carried out in the subject predictive models and optimization of concrete structures framed within the studies of the Master s Degree in Concrete Engineering. In this course, students are introduced to optimization methods through the application of algorithms, as well as other concepts, such as multi-criteria decision-making, the design of experiments and predictive and regression methods. In this case, the life cycle assessment of a 28 m span length steel-concrete composite pedestrian bridge was carried out. The section consists of a steel beam topped by a concrete slab. For this, computer tools were used that implement different scenarios to model the different possibilities. The database used was Ecoinvent and the software employed to assess the life cycle of the structure was openLCA, developed by Greendelta. This methodology allows the student to acquire transversal competencies, such as ethical and environmental responsibility, knowledge of contemporary problems, critical thinking and the use of specific instruments, all of them framed within the institutional project of the Universitat Politècnica de València. This work also presents future studies related to the life cycle assessment of footbridges, not only from energy and environmental points of view, but also accounting for economic and social factors. This learning process was achieved with a reverse teaching methodology that allows the student to acquire knowledge in a more efficient way.