Working Example on 70m Long Ultra High Performance Fiber-Reinforced Concrete (UHPFRC) Composite Bridge

Abstract

In 2016 the Association Francaise de Normalisation (AFNOR - French Standard Institute) has published the world first design standards for ultra-high-performance fibre reinforced concrete (UHPFRC) structures (i.e. NF P18-710:2016). This document is the national additional to Eurocode 2 for concrete structure design. To-date, there are several UHPFRC bridges have been designed using this standard. The design approach for UHPFRC structures are relatively similar to conventional concrete design. This paper presents the working example on the design of 70m span ultra-high-performance fibre reinforced concrete (UHPFRC) composite bridges. The working example mainly focus on (i) the material properties used in the structural analysis software - MIDAS CIVIL; (ii) the output results on the design forces at the critical sections (i.e. design moment effect, MEd and shear force effect, VEd); (iii) the stresses and midspan displacement of the post-tension UHPFRC U-girder at transfer and at different construction load historyand (iv) the design moment resistance (MRd) and design shear resistance (VRd) of the composite section.