Effect of axial force and fibre type on the shear behaviour of high strength fibre reinforced concrete beams

Shaaban, Ibrahim (2005) Effect of axial force and fibre type on the shear behaviour of high strength fibre reinforced concrete beams. In: Cement Combinations for Durable Concrete, 5-7 July 2005, Dundee, Scotland.

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Abstract

This study is part of a larger research work aimed to study the effects of fiber content, fiber type (corrugated shape and hooked-end), amount of web reinforcement and axial compression stress, on the shear behavior of high strength fiber reinforced concrete (HSFRC) beams. To the author's knowledge, the effect of applying axial compression forces, to the HSFRC beams, has not yet been studied. Nineteen simply supported HSFRC beams were subjected to axial compression forces and tested under two-point vertical loading for three values of shear span to depth ratio. It was found that the shear strength of beams subjected to axial compression stress level equals 0.1, is higher than that in the literature for beams tested without applying axial stress by a range of 22% -98%. Increasing the axial compression stress level to 0.2 led to an increase in the first crack load, ultimate load by 24% and 10%, a reduction in the deflection by (19-30%), compared with those subjected to axial compression stress level equals 0.1. In addition, a combination of web reinforcement and fibers resulted in a significant increase in the cracking and ultimate loads by 123 and 59%, respectively, over those of the reference beam. A new formula is proposed for predicting the experimental shear strength of HSFRC beams subjected to axial compression forces. The results obtained by the proposed formula are in better agreement with the test results when compared with the predictions based on the empirical equations proposed by other investigators.

Item Type: Conference or Workshop Item (Paper)
Identifier: 10.1680/ccfdc.34013.0056
Page Range: pp. 505-516
Uncontrolled Keywords: Steel fibers, High strength concrete beams, Hooked-end fibers, Corrugated fibers, Shear, Prediction, Empirical equations
Subjects: Construction and engineering > Civil and structural engineering
Related URLs:
Depositing User: Ibrahim Shaaban
Date Deposited: 08 Jun 2020 20:08
Last Modified: 15 Jun 2020 18:14
URI: http://repository.uwl.ac.uk/id/eprint/7029

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