Simplified prediction of the time dependent deflection of SFRC flexural members

It is well known that the inclusion of steel fibres into a concrete matrix has the potential to improve both the serviceability and strength characteristics of reinforced concrete. As a result of decades of academic interest into the material, design provisions for flexural strength, shear strength...

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Bibliographic Details
Published in:Materials and structures 2020-06, Vol.53 (3), Article 48
Main Authors: Watts, Murray J., Amin, Ali, Gilbert, R. Ian, Kaufmann, Walter, Minelli, Fausto
Format: Article
Language:English
Subjects:
Building construction
Building Materials
Civil Engineering
Codes of Practice
Concrete
Creep (materials)
Engineering
Flexural strength
Machines
Manufacturing
Materials Science
Original Article
Processes
Reinforced concrete
Reinforcing steels
Shear strength
Solid Mechanics
Steel fiber reinforced concretes
Steel fibers
Theoretical and Applied Mechanics
Time dependence
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Summary:It is well known that the inclusion of steel fibres into a concrete matrix has the potential to improve both the serviceability and strength characteristics of reinforced concrete. As a result of decades of academic interest into the material, design provisions for flexural strength, shear strength and short-term serviceability have been incorporated into international codes of practice. However, available design guidelines typically contain little or no guidance for engineers to confidently predict the long-term behaviour of structures manufactured with steel fibre reinforced concrete (SFRC). This limits the full utilization of the material in design practice. This paper presents a simplified model, suitable for design, that can reliably predict the effects of creep and shrinkage in SFRC members containing conventional reinforcement which are subjected to a sustained in-service flexural load. Predictions of the proposed model are compared to available data in the literature and are shown to correlate well.
ISSN:1359-5997
1871-6873
DOI:10.1617/s11527-020-01479-8