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Shear behavior of FRP-UHPC composite beams enhanced by FRP shear key: Experimental study and theoretical analysis

Zhang, Z.
; ; 
Ge, W.
Publication Date
2024-11-11
End of Embargo
Supervisor
Keywords
Composite beam, Shear performance, Fiber reinforced polymers (FRP), Ultra-high performance concrete (UHPC), FRP profile, FRP shear key
Rights
© 2024 Elsevier. Reproduced in accordance with the publisher's self-archiving policy. This manuscript version is made available under the CC-BY-NC-ND 4.0 license.
cb
Peer-Reviewed
Yes
Open Access status
embargoedAccess
Accepted for publication
2024-11-06
Institution
Department
Awarded
Embargo end date
2025-11-11
Collections
Engineering and Digital Technology Publications
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Main article
Adobe PDF, 672.1 KB
Additional title
Abstract
To investigate the shear behavior of FRP (fiber reinforced polymers)-UHPC (ultra-high performance concrete) composite beams, four-point bending tests were conducted on seven FRP-UHPC specimens and two FRP-NSC (normal strength concrete) specimens, having different width and depth of concrete flange as well as FRP shear key (FSK) spacing. The slip between FRP profiles and concrete flange was controlled by employing FSK and epoxy resin bonded hybrid connection. The failure pattern, load-deflection/strain curves, and sliding response of composite beams were analyzed to study the influence of concrete type, FSK spacing, width and thickness of concrete slab. The results indicate that FRP-UHPC composite beams exhibited shear failure, while FRP-NSC composite beams experienced bending-shear failure. The composite beams demonstrated shear-lag effect, which became more pronounced with the increasing of the concrete slab width. The use of UHPC, reducing FSK spacing, and increasing the size of cross-section of concrete flange can effectively enhance the shear performance and reduce interface sliding. Formulae were developed to predict the shear capacity and deflection, considering shear deformation. The results predicted by the formulae developed match well with the experimental results.
URI
http://hdl.handle.net/10454/20161
Version
Accepted manuscript
Citation
Zhang Z, Ashour A and Ge W (2024) Shear behavior of FRP-UHPC composite beams enhanced by FRP shear key: Experimental study and theoretical analysis. Structures. 70: 107796
Link to publisher’s version
Link to published version
Link to Version of Record
https://doi.org/10.1016/j.istruc.2024.107796
Type
Article
Qualification name
Notes
The full text will be available at the end of the publisher's embargo: 11th Nov 2025