<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>Determination of shear-load-bearing capacity of reinforced concrete beams (according to the current normative documents), comprises particular recommended values, which do not depend on the parameters of the sample or load. This article describes the methodology for determination the shear strength with suggestions for calculation the coefficient <italic>C</italic><italic><sub>Rd,c</sub></italic> and compressed element tilt angle <italic>Ѳ</italic> while reinforced concrete elements` calculation with the use of “truss model”. In order to confirm the methodology 4 reinforced concrete beams were tested. Tests were performed in order to investigate each particular inclined section separately. Variable parameter was the relative shear span a/d, with its values a/d=2, a/d=1,5 and a/d=1. Another parameter was the usage of composite strengthening system, made for relative shear span a\d=2. Samples were tested as single-span beams subjected to short-term loading. The calculation with the use only the values, given in norms showed significant divergence of results. Using the refined parameter values provided the convergence of results within 16-29% toward overestimation of the experimental data. The composite reinforcement system calculation showed the overestimation of 23%, which is within the same limits as for the control samples.</p>
</abstract>

Determination of shear-load-bearing capacity of reinforced concrete beams (according to the current normative documents), comprises particular recommended values, which do not depend on the parameters of the sample or load. This article describes the methodology for determination the shear strength with suggestions for calculation the coefficient CRd,c and compressed element tilt angle Ѳ while reinforced concrete elements` calculation with the use of “truss model”. In order to confirm the methodology 4 reinforced concrete beams were tested. Tests were performed in order to investigate each particular inclined section separately. Variable parameter was the relative shear span a/d, with its values a/d=2, a/d=1,5 and a/d=1. Another parameter was the usage of composite strengthening system, made for relative shear span a\d=2. Samples were tested as single-span beams subjected to short-term loading. The calculation with the use only the values, given in norms showed significant divergence of results. Using the refined parameter values provided the convergence of results within 16-29% toward overestimation of the experimental data. The composite reinforcement system calculation showed the overestimation of 23%, which is within the same limits as for the control samples.

Improvement Method of Calculation Reinforced Concrete Beams on the Shear Strengthened FRCM System

System Safety: Human - Technical Facility - Environment

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Determination of shear-load-bearing capacity of reinforced concrete beams (according to the current normative documents), comprises particular recommended...

Improvement Method of Calculation Reinforced Concrete Beams on the Shear Strengthened FRCM System

Publié en ligne: 18 avr. 2020

Pages: 215 - 222

Reçu: 29 nov. 2019

Accepté: 15 janv. 2020

DOI: https://doi.org/10.2478/czoto-2020-0026

Mots clés
reinforced concrete beam, shear, shear span, FRCM strengthening, calculation

© 2020 Zinoviy Blikharskyy et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Improvement Method of Calculation Reinforced Concrete Beams on the Shear Strengthened FRCM System

Publié en ligne: 18 avr. 2020

Pages: 215 - 222

Reçu: 29 nov. 2019

Accepté: 15 janv. 2020

DOI: https://doi.org/10.2478/czoto-2020-0026

Mots clésreinforced concrete beam, shear, shear span, FRCM strengthening, calculation

© 2020 Zinoviy Blikharskyy et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Mots clés
reinforced concrete beam, shear, shear span, FRCM strengthening, calculation