Strength of steel fiber reinforced concrete beams in pure torsion

This paper presents a simple yet accurate technique for determining the strength of steel fiber reinforced concrete beams loaded in pure torsion. The results of the model are compared with 21 beams found in the literature as well as two new beams tested by the authors and reported herein. The model...

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Bibliographic Details
Published in:Structural concrete : journal of the FIB 2018-06, Vol.19 (3), p.684-694
Main Authors: Amin, Ali, Bentz, Evan C.
Format: Article
Language:English
Subjects:
concrete
Mathematical models
Predictions
Reinforced concrete
Reinforcing steels
Repair & maintenance
simplified MCFT
space truss analogy
steel fiber
Steel fiber reinforced concretes
Steel fibers
Torsion
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Summary:This paper presents a simple yet accurate technique for determining the strength of steel fiber reinforced concrete beams loaded in pure torsion. The results of the model are compared with 21 beams found in the literature as well as two new beams tested by the authors and reported herein. The model considers the beneficial effect of the fibers in resisting tension after the concrete matrix has cracked, and it is implemented into the widely accepted space truss analogy for reinforced concrete members subjected to pure torsion. The proposed model provides good correlations to the collected test data with a test to predicted ratio of 1.10 and COV of 0.19. A simplified method of the aforementioned model, suitable for design, is also presented and is shown to provide good predictions to the test data.
ISSN:1464-4177
1751-7648
DOI:10.1002/suco.201700183