Related Experiment Video
Updated: Jan 10, 2026

Preparation of Aligned Steel Fiber Reinforced Cementitious Composite and Its Flexural Behavior
Published on: June 27, 2018
The Behavior of Beams Reinforced with Patches Under Three-Point Bending: An Experimental Investigation
Fatima Benaoum1, Foudil Khelil1, Abdelghani Baltach2
1Mechanical Engineering Department, University of Mascara, Mascara 29000, Algeria.
None:
This study assesses the flexural performance of concrete beams repaired with externally bonded carbon-fiber-reinforced polymer (CFRP) patches under controlled damage conditions. Prismatic beams (7 × 7 × 28 cm) underwent three-point bending tests in four configurations: uncracked, uncracked-reinforced, cracked-unrepaired, and cracked-repaired. Pre-existing damage was caused by mid-span notches at a = 7, 21, and 35 mm. CFRP patches were placed on the tension face, and the ultimate load and failure mode were recorded. Repairing CFRP beams increased maximum load by up to 240% compared to unrepaired counterparts, and the failure characteristic changed from brittle shear to ductile flexural. Strengthening uncracked beams also yielded significant benefits. These findings show that patch-type CFRP reinforcement effectively recovers and enhances flexural performance across a wide range of crack severity, and they provide quantitative guidelines for determining repair levels depending on original crack depth.
More Related Videos
Related Concept Videos
Design of Prismatic Beams for Bending
Shearing Stresses in a Beam: Problem Solving
Prismatic Beams: Problem Solving
The design begins with analyzing the beam as a free body to identify moments and force balances, thereby determining support reactions. Next, the...
Beams with Unsymmetric Loadings
The first moment-area theorem determines the slope at any point on the beam. This theorem indicates that the change in slope between two points on a beam...
Deformation of a Beam under Transverse Loading
The insights from the bending moment diagram extend to...
Plastic Deformations

