Multi-criteria decision analysis techniques applied to the construction of a composite box-girder bridge

Abstract

[EN] This work is based on the case study of a multiple-criteria decision analysis, aimed for the students of the Predictive and optimization models for concrete structures subject, which is taught in the master s degree in Concrete Engineering at the Universitat Politècnica de València. This course features different blocks, among which the optimization of structural and constructive elements by different techniques stands out. Additionally, different techniques of multiple-criteria decision analysis are studied. This case study allows the comparison between two different evaluation methods; the direct comparison method SAW, and the pairwise comparison method AHP. The object of this study is to carry out an analysis of the different types of structural alternatives of a bridge. In this case, four possibilities are considered: Lower Arch, bowstring, cable-stayed and box-girder bridges; for a span length of 100 m, without any supports due to the environmental conditions. The student will acquire different competencies that will allow him, not only to obtain the technical knowledge, but also the capacity to analyze, and solve problems, creativity, innovation, as well as an ethical, professional and environmental awareness. The result of this article opens a field for the investigation of these type of processes through other methods of multiple-criteria decision analysis.