Chapter
Apr 4, 2017
Fatigue Behavior of Reinforced Concrete Beams with Temperature Differentials at Room and Low Temperatures
Authors: M. Mehdi Mirzazadeh [email protected], Martin Noel [email protected], and Mark Green [email protected]Author Affiliations
Publication: Structures Congress 2017
Abstract
This paper investigates the fatigue behavior of reinforced concrete beams at low temperatures compared to similar beams tested in fatigue at room temperature. Four large-scale steel reinforced beams (200 mm x 400 mm x 4200 mm) were fabricated and tested under cyclic load to failure. This study showed that the fatigue life of the reinforced concrete improved at low temperature and this improvement was much more pronounced when shear reinforcement was not present. In fact, low temperature changed the mode of failure of the reinforced concrete beams without stirrups from shear to flexural fatigue failure as a result of the higher shear strength and stiffness of the reinforced concrete, the lower number of cracks with smaller widths, and improved fatigue properties of steel at low temperature. The results showed that the fatigue life of the reinforced concrete beam without shear reinforcement at room temperature primarily depended on the concrete and concrete to steel bond while fatigue lives of the other beams depended on the stresses in the tensile reinforcement. The findings of this study showed that the contribution of concrete to the performance of the beam under either static or cyclic load becomes more pronounced at low temperature.
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© 2017 American Society of Civil Engineers.
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Published online: Apr 4, 2017
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Dept. of Civil Engineering, Queen’s Univ., Kingston, ON, Canada K7L 3N6. E-mail: [email protected]
Dept. of Civil Engineering, Univ. of Ottawa, 161 Louis-Pasteur, CBY A513, Ottawa, ON, Canada K1N 6N5. E-mail: [email protected]
Dept. of Civil Engineering, Queen’s Univ., Kingston, ON, Canada K7L 3N6. E-mail: [email protected]
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