Diseño y comparación económica de la super-estructura de un puente de 30 metros de luz considerando variantes de losa con vigas de hormigón postensado y vigas-losa-cajón

Abstract

In the present project, the design, technical comparison and economic comparison of the superstructure of two bridges of 30 meters in length without intermediate supports is made, considering the slab variants on post-tensioned concrete beams and box girder. The design is based on what specified in the AASHTO LRFD 2017, ACI-14, NEC-15 and NEVI-12. For the bridge with the variant slabs on beams the design has been made with the help of spreadsheets developed during the elaboration of this project, while for the bridge with the variant of box girder a pre-design based in the standards described in the previous paragraph and modeled with the help of computer packages specialized in bridge modeling. For the economic analysis, the current costs in the country have been taken into account at the time of this project, both for materials and for labor, in addition, a schedule of activities has been determined with the help of Gantt charts and timetables valued in equal time scales for each bridge under similar conditions of location and ease of logistics, to establish consistent comparison indicators.