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Modelling the ultimate shear behaviour of deep beams with internal FRP reinforcement
Mihaylov, Boyan
2016In Performance-based approaches for concrete structures, fib Symposium Proceedings, Cape Town 21 to 23 November 2016
Peer reviewed
 

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Keywords :
deep beams; FRP reinforcement; shear strength; kinematic model; ultimate deformations
Abstract :
[en] Fiber reinforced polymer (FRP) reinforcement in deep beams has been proposed as an alternative to steel reinforcement to increase the durability of members in corrosive environments. Since FRP reinforcement has lower stiffness than steel reinforcement and typically exhibits higher tensile strength, there is a need for new models capable of capturing the effect of these properties on the shear strength of deep beams. This paper proposes such an approach for members without shear reinforcement, which is an extension of a two-parameter kinematic theory (2PKT) for steel-reinforced deep beams. The original approach is modified to account for the effect of large flexural strains on the shear capacity of the critical loading zones in deep beams where the concrete crushes at failure. It is shown that a simple modification based on test data can result in adequate shear strength predictions. It is also shown that the extended 2PKT captures well the effect of reinforcement stiffness, shear-span-to-depth ratio, and section depth on the shear capacity of deep beams with FRP reinforcement.
Disciplines :
Civil engineering
Author, co-author :
Mihaylov, Boyan ;  Université de Liège > Département ArGEnCo > Structures en béton
Language :
English
Title :
Modelling the ultimate shear behaviour of deep beams with internal FRP reinforcement
Publication date :
22 November 2016
Event name :
fib Symposium 2016 - Performance-based approaches for concrete structures: Materials technology, structural design, analytical modelling, conformity assesment and testing
Event date :
from 21-11-2016 to 23-11-2016
Audience :
International
Main work title :
Performance-based approaches for concrete structures, fib Symposium Proceedings, Cape Town 21 to 23 November 2016
Peer reviewed :
Peer reviewed
Available on ORBi :
since 20 February 2017

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