BEHAVIOUR OF HYBRID COMPOSITE-CONCRETE BEAMS UNDER STATIC FLEXURAL LOADING: A COMPARATIVE EXPERIMENTAL ANALYSIS

Author(s): Sven De Sutter, Tine Tysmans, Svetlana Verbruggen, Maciej Wozniak and Matthias De Munck
Book Title: FERRO-11 – 11th International Symposium on Ferrocement and 3rd ICTRC - International Conference on Textile Reinforced Concrete
Editor: Wolfgang Brameshuber
Print-ISBN: 978-2-35158-152-0
e-ISBN: 978-2-35158-153-7
Publisher: RILEM Publications SARL
Publication year: 2015
Pages: 501-510
Total Pages: 10
Language: English

Abstract: The use of composites such as TRCs (Textile Reinforced Cements) and FRPs (Fibre Rein-forced Polymers) in civil structures is nowadays mostly limited to strengthening and repair applications and stay-in-place formworks. The authors propose to integrate these materials into a new floor system - suited for renovation purposes - in order to facilitate the manual installation by lightweight elements. Lightweight hybrid beams and intermediate placed sandwich panels constitute the formwork for the finishing concrete layer. The hybrid beams themselves are composed of a TRC box with FRP reinforcement inside and concrete on top. This paper focuses on the behaviour of these hybrid beams under static flexural load-ing. Therefore, four hybrid beams with a different amount of Carbon Fibre Reinforced Polymers (CFRPs) and concrete are tested until failure under four point loading. 3-m-span hybrid beams with a different amount of reinforcement are compared to the Eurocode requirements in SLS (Serviceability Limit State) and ULS (Ultimate Limit State). Further on, this paper proves the ability to simulate the experimental behaviour by an analytical model and elaborates on the composite action of the hybrid beams regarding strains, neutral axis and bending stiffness. This paper proves and quantifies the weight- and structural ad-vantages of hybrid composite-concrete beams and provides a first insight in the possible future application of composites for the design of a lightweight floor concept.

Online publication: 2015
Publication Type: full_text
Public price (Euros): 0.00