EAS Publisher | The enhancement of ultimate torsional resistance of under-reinforced fibrous, high strength concrete beams by the thickness of concrete cover

The enhancement of ultimate torsional resistance of under-reinforced fibrous, high strength concrete beams by the thickness of concrete cover

DOI : https://doi.org/10.36349/EASJECS.2020.v03i01.002

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This research highlights the contribution of concrete cover to improve the torsional resistance of peak load of under-reinforced fibrous high-strength concrete beams. The thickness of concrete cover is the main variable which was varied from 17 mm to 53 mm in this research. To investigate the influence of thickness of concrete cover on the behavior of under-reinforced fibrous, high strength concrete beams subjected to pure torsional loading, four rectangular solid beams were cast and tested. The test results showed that the torsional resistances at peak load was improved up to 80.6%. Furthermore, all of the twisting angle, shear strain in concrete, strain in transverse reinforcement, and strain in longitudinal reinforcement were reduced at peak loads up to 70.2%, 90%, 50.6%, and 34.5%, respectively.

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