Structural behavior of prestressed ultra-high performance fibre-reinforced concrete beams with and without openings : comparison between experimental results and finite element modelling techniques

Redaelli, Dario (School of Engineering and Architecture (HEIA-FR), HES-SO // University of Applied Sciences Western Switzerland) ; Nseir, Joanna Yared (Saint Joseph University, Beirut, Lebanon)

This paper presents the results of a numerical study carried out by the authors to better understand the structural behavior of prestressed beams with a complex geometry and to identify numerical modelling techniques that allow to adequately predict such behavior. UltraHigh Performance Fibre Reinfored Concrete (UHPC) beams with and without openings 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.


Keywords:
Conference Type:
full paper
Faculty:
Ingénierie et Architecture
School:
HEIA-FR
Institute:
iTEC - Institut des technologies de l'environnement construit
Subject(s):
Ingénierie
Publisher:
Beirut, Lebanon, 28-30 June 2018
Date:
2018-06
Beirut, Lebanon
28-30 June 2018
Pagination:
10 p.
Published in:
Proceedings of FRC 2018 - 3rd ACI-fib-RILEM Workshop on fibre reinforced concrete: from design to structural applications, 28-30 June 2018, Desenzano, Lake Garda, Italy
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 Record created 2019-02-05, last modified 2019-02-26

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