COST-OPTIMAL DESIGN OF FLEXURAL CONCRETE BEAM REINFORCED WITH FRP REINFORCEMENTS

Author(s): Sigbjørn Tveit (1), Martin Wilhelmsen (1), Vlad Aleksander Lundeland (1), Mahdi Kioumarsi (1)
Paper category: Proceedings
Book title: SynerCrete’18 International Conference on Interdisciplinary Approaches for Cement-based Materials and Structural Concrete
Editor(s): Miguel Azenha, Dirk Schlicke, Farid Benboudjema, Agnieszka Jędrzejewska
ISBN: 978-2-35158-202-2
e-ISBN: 978-2-35158-203-9
Publisher: RILEM Publications SARL
Publication year: 2018
Pages: 951-956
Total Pages: 6
Language : English

Abstract: Because of the non-ductile nature of FRP reinforcement, the convention of designing cross-sections with the flexure strength limited by reinforcement yield, as for steel, is not adequate. Although ACI 440.1R-15 gives easily fetched explanations on how to design FRP-reinforced concrete (FRPRC) sections for flexure, an understanding of the different parameters economic influence is required for FRP to be a competitive alternative to steel. In this paper, an analytical tool for cost-optimally analyzing and designing FRPRC-cross-
sections according to ACI 440.1R-15 is presented. To this aim, by optimizing the functions for flexural strength and for the approximated price pr. meter of a cross-section – with respect to both fiber cross-section area and effective depth of concrete cross-section – a formula for the most economical ratio of these parameters in regard to flexural strength is presented. For a given FRP and concrete type, the optimal ratio proves to be the same for all desired flexural capacities, and can for rectangular cross-sections be presented as a function of the cross-section width.

Online publication : 2018
Publication type : full_text
Public price (Euros) : 0.00