Ultimate Shear Strength of Ultra High Performance Fibre Reinforced Concrete Beams
BABY ; BILLO ; RENAUD ; MASSOTTE ; MARCHAND ; TOUTLEMONDE
Type de document
COMMUNICATION AVEC ACTES INTERNATIONAL (ACTI)
Langue
anglais
Auteur
BABY ; BILLO ; RENAUD ; MASSOTTE ; MARCHAND ; TOUTLEMONDE
Résumé / Abstract
In order to quantify the safety margin of shear design provisions for UHPFRC, an experimental campaign has been carried out. In a Four-Point Bending configuration, shear tests have been conducted on eleven 3m-long I-shaped girders with varied types of shear reinforcement (links, fibers and both) or without shear reinforcement, combined with longitudinal prestressing or passive reinforcement. These shear tests have been analyzed thanks to a complete materials characterization. Moreover, in order to identify the contribution of the fibers in the ultimate shear strength, prisms have been cut horizontally, vertically, at 30° and at 45° in both extremities of the beams, to determine the effective 'orientation factor'. A detailed analysis has been carried out based on these experimental results both at the material and structural scale. This analysis helps validate the safety of the shear design AFGC provisions at the Ultimate Limit State (ULS).
