Behavior of Confined Concrete using Prestressing Skew Bars
A. M. Elhashimy1, A. Abbas2
1A.M. Elhashimy*, Department of Civil Engineering, Helwan University, Cairo, Egypt.
2A.Abbas, Department of Civil Engineering, Helwan University, Cairo, Egypt.
Manuscript received on January 06, 2021. | Revised Manuscript received on January 10, 2021. | Manuscript published on February 28, 2022. | PP: 12-16 | Volume-11 Issue-3, February 2022. | Retrieval Number: 100.1/ijeat.C33540211322 | DOI: 10.35940/ijeat.C3354.0211322
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Abstract: This paper presents the results of an experimental study on the biaxial compression behavior of concrete prism confined using pre-stressed bars. The pre-stressed bars could provide passive confinement stress, that preventing the lateral strain of the prism from increasing leading to an increase in both the initial modulus of elasticity and prism compressive strength. The confined concrete had a higher compressive strength that was directly proportional to the confinement bar pressing force and lower ductility than the plain prisms. The concrete initial modulus of elasticity is directly proportioned to the confinement lateral pressure of the prestressing bar and inversely proportion with the spacing between prestressing bars. It was simple to find out that the best pre-stressing stress was 10 N/mm2, also the compressive strength of the confined concrete with pre-stressed skew bars was greater than the compressive strength of the unconfined concrete by more 3.3 times.
Keywords: Compressive Strength, Confined Concrete, Prestressing Skew Bars, Prestressing Stress.
Scope of the Article: Concrete Engineering.