Effect of Axial Restraint and Loading History on the Behavior of Short Reinforced Concrete Coupling Beams

Mihaylov, Boyan; Trandafir, Alexandru; Palios, X.; Στρεπέλιας, Ηλίας; Bousias, Stathis

doi:10.14359/51732644

Cited by 3 publications

(1 citation statement)

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“…At 3% drift, the flexural capacities were enhanced by 141–155% in the case of positive bending, and by 74–86% in the case of negative bending. Mihaylov et al [ 11 ] carried out laboratory tests consisting of four large coupled beams with different axial restriction degrees and loading types. A strut-and-tie model was also proposed to analyze the test results.…”

Section: Introductionmentioning

confidence: 99%

Flexural Response of Axially Restricted RC Beams: Numerical and Theoretical Study

Lopes

et al. 2022

Materials

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Reinforced concrete (RC) frame beams are subject to axial restriction at the ends, which plays an important role in the nonlinear behavior of these beams. This paper presents a numerical and theoretical investigation into the flexural behavior of RC beams axially restricted with external steel or fiber reinforced polymer (FRP) reinforcement. A numerical procedure for RC beams axially restricted with external reinforcement has been developed and it is verified against available experimental results. A numerical parametric study is then performed on axially restricted RC beams, focusing on the effect of type, area, and depth of external reinforcement. The results show that axial restriction increases the post-cracking stiffness and ultimate load-carrying capacity but reduces the flexural ductility. The ultimate stress in external reinforcement is substantially impacted by reinforcement type, area, and depth. A simplified model is developed to predict the ultimate load of RC beams axially restricted with external steel/FRP reinforcement. The predictions of the proposed simplified model agree favorably with the numerical results. The correlation coefficient for the ultimate load is 0.984, and the mean difference is −2.11% with a standard deviation of 3.62%.

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Section: Introductionmentioning

confidence: 99%