Title: Structural behavior of prestressed Ultra-High Performance Fibre-Reinforced Concrete beams with and without openings: comparison between experimental results and finite element modelling techniques
Author(s): Redaelli, D.; Nseir, J.Y.
Publication: Symposium Paper
Appears on pages(s): 474-483
Keywords: Ultra-High Performance Concrete, Finite Elements, Prestressed Beams, Cellular Beams.
This paper presents the results of a numerical study carried out by the authors to better
understand the structural behavior of prestressed beams with web openings and to identify
numerical modelling techniques that allow to adequately predict such behavior. Ultra-High
Performance Fibre Reinforced Concrete (UHPC) beams are considered, with a focus on
shear-controlled failure modes.
For all the beams considered in this study, prestressing is used to resist the main bending
moment. However, no other reinforcement is added to the beams, in order to emphasize the
structural contribution of the fibers and to focus on solutions that could be economically
competitive for the precast industry.
The results of non-linear simulations performed with existing finite elements codes are
compared and validated against experimental results of tests carried out at the University of
Applied Sciences of Western Switzerland. The main assumptions of the numerical
simulations are discussed, as well as the results and the limits of the analysis.