Torsional Behavior of Strengthened Reinforced Concrete Beams by CFRP Sheets: Parametric study

Alrawi, Mashael A.; Mahmood, Mohammad N.

doi:10.37649/aengs.2021.171191

	Torsional Behavior of Strengthened Reinforced Concrete Beams by CFRP Sheets: Parametric study
Anbar Journal of Engineering Sciences
Article 14, Volume 12, Issue 2, 2021, Pages 229-244 PDF (3.64 M)
Document Type: Research Paper
DOI: 10.37649/aengs.2021.171191
Authors
Mashael A. Alrawi; Mohammad N. Mahmood
Civil Engineering Department, Mosul University, Mosul, Iraq.
Abstract
This paper presents a nonlinear finite element analysis of reinforced concrete beams subjected to pure torsion. A verification procedure was performed on three specimens by finite element analysis using ANSYS software. The verification with the experimental work revealed a good agreement through the torque-rotation relationship, ultimate torque, rotation, and crack pattern. The studied parameters of strengthening by CFRP sheets included strengthening configurations and number of CFRP layers. The confinement configuration methods included full wrapping sheet around the beam, U-shaped sheet, ring strips spaced at either 65 or 130 mm, longitudinal strips at the top and bottom faces, U-shaped strips in addition to the number of layers variable. It was found that the performance of the beam for resisting a torsional force was improved by (33-49%) depending on the method of coating with CFRP sheets and the number of used layers. A change in the angle of twist, as well as the shape of the spread of cracks, was also noticed from the predicted results.
Keywords
RC beam; CFRP; ultimate strength; Finite element analysis; torsion

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