Flexural Behavior of Concrete Beams Strengthened with Near-Surface-Mounted CFRP Strips

2007 ◽  
Vol 104 (4) ◽  
Keyword(s):  
Concrete Beams ◽  
Flexural Behavior ◽  
Near Surface ◽  
Near Surface Mounted

scholarly journals A Parametric Study on the Flexural Strengthening of Reinforced Concrete Beams with Near Surface Mounted FRP Bars

2018 ◽  
Vol 4 (8) ◽  
pp. 1917
Author(s):  
Minu Panahi ◽  
Mohsen Izadinia
Keyword(s):  
Reinforced Concrete ◽  
Concrete Beams ◽  
Weight Ratio ◽  
Bending Moment ◽  
Reinforced Concrete Beams ◽  
Flexural Behavior ◽  
Experimental Investigations ◽  
Near Surface ◽  
Finite Element Software ◽  
Near Surface Mounted

FRP rods as lightweight materials with extraordinary properties of high strength to weight ratio, corrosion resistance, potentially high overall durability, tailor ability and high specific attributes are one of the most favorable materials to strengthen existing reinforced structures. The present study aimed to identify the behavior of reinforced concrete flexural beams strengthened with fiber reinforced polymer (FRP) rods through near surface mounted method (NSM). The results of the current study were based on nonlinear finite element software ABAQUS which can accurately simulate the experimental investigations on flexural behavior of reinforced concrete beams strengthened with NSM FRP rods. Validation of the proposed model was confirmed first by making a comparison with the experimental study presented in the literature. A parametric analysis was conducted on validated specimens to investigate the effect of FRP rod diameters, rod arrangements, FRP materials, as well as rods groove intervals on flexural behavior of strengthened reinforced beams. The numerical results of mid-span bending moment deflection, ultimate bending moment, failure deflection and ductility index were reported. For the sake of simplicity to be used by engineers, the results of the current study were drawn in the form of design charts and tables.

Experimental Study on Flexural Bearing Capacity of Concrete Beams Strengthened with NSM CFRP-PCPs Composite Bars

2014 ◽  
Vol 584-586 ◽  
pp. 908-911
Author(s):  
Li Hong Cheng ◽  
Jiong Feng Liang ◽  
Ming Hua Hu
Keyword(s):  
Experimental Study ◽  
Reinforced Concrete ◽  
Concrete Beams ◽  
Flexural Behavior ◽  
Concrete Member ◽  
Near Surface ◽  
Reinforced Concrete Member ◽  
Bonding Area ◽  
Flexural Bearing Capacity ◽  
Near Surface Mounted

The flexural behavior of concrete beams strengthened with near surface mounted (NSM) CFRP-PCPs composite rebars was studied. Experimental results showed that embedded CFRP-PCPs reinforcement method can effectively improve strength, stiffness and cracks of the reinforced concrete member, and PCPs increased with concrete bonding area, thus avoiding the strip damage of the traditional embedded reinforcement.

scholarly journals FLEXURAL BEHAVIOR OF PRESTRESSED CONCRETE BEAMS STRENGTHENED BY NEAR SURFACE MOUNTED FRP RODS

2019 ◽  
Vol 14 (53) ◽  
pp. 1424-1435
Author(s):  
Belal Elharouney ◽  
Ayman Hussein ◽  
Ezz El-Deen Mostafa ◽  
Amr Elnemr
Keyword(s):  
Prestressed Concrete ◽  
Concrete Beams ◽  
Flexural Behavior ◽  
Near Surface ◽  
Near Surface Mounted

Experimental Research on Flexural Behavior of Load-Bearing Characteristics on Reinfoeced Concrete Beams Strengthened with near Surface Mounted Prestressed CFRP Tendons

2011 ◽  
Vol 94-96 ◽  
pp. 1415-1419
Author(s):  
Ping Xu ◽  
Min Xia Zhang ◽  
Ya Hong Ding ◽  
Xing Guo Wang
Keyword(s):  
Concrete Beams ◽  
High Strength ◽  
Concrete Surface ◽  
Flexural Behavior ◽  
Bending Test ◽  
Near Surface ◽  
Load Bearing ◽  
Strength Performance ◽  
Near Surface Mounted ◽  
Different Levels

In order to improve flexural behavior of concrete beams, the 7mm-diameter carbon fiber reinforced plastic (CFRP) tendons applied different levels of prestress were put in to 20×20mm grooves opened in the concrete surface of the tensile region in the concrete beams.Grooves were filled with building structural adhesive, when it solidified bending test of strengthened beams would carry out. Flexural behavior of nine RC beams strengthened with prestressed near surface mounted CFRP tendons applied different levels of prestress and one unstrengthened RC beam were studied. In these tests, bending stiffness and load-bearing characteristics of test specimens were studied. Experimental results show that the high-strength performance of CFRP have been made full use; the stiffness of strengthened beams risen notably, the maximal crack load increased by 303.17%, the maximal ultimate load increased by 237.92%.

Flexural Behavior of near Surface Mounted CFRP Bars Strengthened Reinforced Concrete Beams

2012 ◽  
Vol 535-537 ◽  
pp. 1702-1710 ◽  
Author(s):  
Shuaib H. Ahmad ◽  
Abdullah Bin Najm ◽  
Antonio Naani
Keyword(s):  
Reinforced Concrete ◽  
Analytical Model ◽  
Concrete Beams ◽  
Reinforced Concrete Beams ◽  
Flexural Behavior ◽  
Rc Beams ◽  
Near Surface ◽  
Rc Structures ◽  
Cfrp Laminates ◽  
Near Surface Mounted

In recent decades, use of fibre reinforced polymers (FRP) materials has become very popular for strengthening / re-strengthening of reinforced concrete (RC) structures. This includes flexural and shear strengthening of RC structural members such as slabs, beams and columns.In this study, a computerized analytical model is presented to predict the load-deflection response of flexure critical RC beams externally strengthened with near surface mounted (NSM) CFRP laminates. The analyical model utilizes constitutive material properties of concrete, reinforcing steel, CFRP laminate materials, strain compatibility, sectional analysis to develop moment-curvature relationships, which then are used to generate the load-rotations and load-deflection of the flexure critical RC Beams strengthend with NSM CFRP laminates. For validation of the analytical model, the predictions of the analytical model are compared with the experimental results of flexure critical RC beams strengthened with NSM CFRP laminates and the comparisons are judged to be good.As a part of the experimental investigation of this study, a series of 18 full scale beams Reinforced Concrete Beams strengthened with carbon fiber reinforced polymer (CFRP) laminates will be tested in flexure and shear. The results of flexural tests will be analyzed and compared with the predictions of the analytical model.

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