Effectiveness of Fabric-Reinforced Cementitious Matrix in Strengthening Reinforced Concrete Beams
Abstract
This paper reports on the efficiency of fabric-reinforced cementitious matrix (FRCM) in enhancing the flexural capacity and deformational characteristics of RC beams. In the main experimental part of the paper, 12 RC beams, 2,500 mm long, 150 mm wide, and 260 mm deep, were fabricated. The beams had two different steel reinforcement ratios, namely,
ρ
D12
s
=0.72%
ρsD12=0.72%
and
ρ
D16
s
=1.27%
ρsD16=1.27%
, representing typical underreinforced beam sections. The strengthened beams utilized two FRCM types, carbon and polyparaphenylene benzobisoxazole (PBO) FRCM systems. In the second part of the work, tensile material characterization tests were performed on the FRCM coupons to determine the tensile characteristics of the FRCM composites. The beams were tested in flexure under four-point loading until failure. Two beams without FRCM strengthening were used as a benchmark. Six beams were externally strengthened using one, two, and three layers of carbon FRCM system. Four beams were strengthened with one and two layers of PBO FRCM system. Test results showed that the flexural capacity of the strengthened beams increased by 77% for the carbon FRCM system (three layers) and to 27% for the PBO FRCM system (two layers) over that of their benchmark (unstrengthened) beams.
Collections
- Civil & Architectural Engineering [437 items ]
Related items
Showing items related by title, author, creator and subject.
-
Flexural Behavior Of Basalt Fiber Reinforced One-Way Concrete Slabs Reinforced With Fiber Reinforced Polymer Bars
Rihan, Yousrf Adnan Omer (2018 , Master Thesis)The State of Qatar suffers from a harsh environment in the form of high temperature that prevails almost all year round, in addition to severe humidity and coastal conditions. This exposure leads to the rapid deterioration ... -
Shear Behavior Of Reinforced High-Strength Concrete Beams Without Shear Reinforcement
Wafa, Faisal F. ( Qatar University , 1994 , Article)Eighteen rectangular singly reinforced high-strength concrete beams without web reinforcement were tested in combined shear and flexure. The main variables were the longitudinal steel reinforcement ratio and the shear-span ... -
Flexural and interfacial behavior of externally bonded/ mechanically fastened fiber-reinforced polymer-strengthened reinforced concrete beams
Ebead, Usama; Saeed, Huda ( American Concrete Institute , 2014 , Article)The determination of structural behavior requires advanced numerical methods, of which results are substantiated by credible experimental findings. This research aims to create precise finite element models for fiber-reinforced ...