Simulation Analysis on Shear Behavior of RC Beams with Near-Surface Mounted GFRP Bars

2014 ◽  
Vol 578-579 ◽  
pp. 1327-1331
Author(s):  
Hai Xia Zhang ◽  
Lu Yuan He ◽  
Hong Liu
Keyword(s):  
Simulation Analysis ◽  
Great Influence ◽  
Shear Behavior ◽  
Epoxy Adhesive ◽  
Shear Capacity ◽  
Rc Beams ◽  
Near Surface ◽  
Shear Span ◽  
Gfrp Bars ◽  
Near Surface Mounted

This paper focuses on the characterization of shear behavior of RC beams strengthened with Near-Surface Mounted (NSM) GFRP bars. Based on ABAQUS, the finite element model for the shear behavior is established and the simulated results are compared with the test results. The parameters including spacing and inclination of GFRP bars, mechanical properties of the groove-filling epoxy, stirrup ratio and shear-span ratio of the specimen beams for the shear behavior are discussed. The simulated results show that there has a good agreement with the experiment results. The beams strengthened with NSM GFRP bars have a significant improvement in shear capacity. Further more, the analysis results on the parameters indicate that ultimate shear capacity of the beam strengthened with NSM-GFRP bars gradually increases with the decrease of spacing of GFRP bars. The ultimate bearing capacity increases of the strengthened beam with inclination of 45° is the more larger than those of 60° and 90°. The different types of epoxy adhesive and shear-span ratio have a great influence on the load-deflection curves of the strengthened beams.

Simulation Analysis on Repair of Concrete Beams Using Near-Surface Mounted GFRP Bars

2011 ◽  
Vol 243-249 ◽  
pp. 5496-5500
Author(s):  
Hai Xia Zhang ◽  
Guo Rui Liu ◽  
Peng Peng Cao
Keyword(s):  
Simulation Analysis ◽  
Great Influence ◽  
Element Model ◽  
Steel Reinforcement ◽  
Flexural Behavior ◽  
Near Surface ◽  
Gfrp Bars ◽  
Near Surface Mounted ◽  
Embedment Length ◽  
Frp Bars

This paper focuses on the characterization of flexural behavior of RC beams strengthened with Near-Surface Mounted (NSM) GFRP bars. Based on ABAQUS, the finite element model for the flexural behavior is established and the simulated results are compared with the test results. The parameters including the amount of GFRP bars, the embedment length of GFRP bars, the types of FRP bars, and the ratio of internal steel reinforcement in the beam for the flexural behavior are discussed. The simulated results show that there has a good agreement with the experiment results. The beams strengthened with NSM GFRP bars have a significant improvement in flexural stiffness and bending capacity. Further more, the analysis results on the parameters indicate that ultimate bearing capacity of the beam strengthened with NSM-GFRP bars gradually increases with the amount of FRP bars and the ratio of the longitudinal steel reinforcement. The mode of failure of the beam strengthened with the smaller embedment length of GFRP bars is not the rupture of GFRP bars. The different types of FRP bars have a great influence on the load-deflection curves of the beams.

Calculation of Shear Capacity of Steel Reinforced Concrete Beams Strengthened with Near-Surface Mounted CFRP Rods

2012 ◽  
Vol 193-194 ◽  
pp. 852-854
Author(s):  
Wei Hua Chen ◽  
Mei Qin Wu
Keyword(s):  
Reinforced Concrete ◽  
Reinforced Concrete Beam ◽  
Shear Capacity ◽  
Reinforced Concrete Beams ◽  
Rc Beams ◽  
Near Surface ◽  
Steel Reinforced Concrete ◽  
Carbon Fiber Reinforce Polymer ◽  
Near Surface Mounted ◽  
Fiber Reinforce

Some calculated methods of shear capacity of RC beams strengthened with NSM(near-surface mounted) CFRP(Carbon fiber reinforce polymer) rods are reviewed based on the experimental data on shear capacity of RC beams strengthened with NSM CFRP rods. Therefore, according to the destruction forms of steel reinforced concrete beam strengthened with NSM CFRP rods, the formula for calculating the shear capacity of the beam is given. The formula is expressed clearly, simple and easy to use.

SHEAR BEHAVIOR OF REINFORCED CONCRETE SLENDER BEAMS

2016 ◽  
Vol 3 (1) ◽  
Author(s):  
Muhammad K. Kayani ◽  
Wasim Khaliq ◽  
Muhammad K. Shehzad
Keyword(s):  
Reinforced Concrete ◽  
Shear Behavior ◽  
Shear Capacity ◽  
Experimental Program ◽  
Longitudinal Reinforcement ◽  
Rc Beams ◽  
Shear Reinforcement ◽  
Shear Span ◽  
Depth Ratio ◽  
Slender Beams

Major factors contributing to the shear behavior in reinforced concrete (RC) beams have been identified as compressive strength of concrete, shear span to effective depth ratio, and longitudinal reinforcement. Though significant, few of these factors are not fully incorporated in ACI code provisions for design of minimum shear reinforcement. To investigate the effect of these parameters, an analytical and experimental study was undertaken on the shear behavior of ordinary strength RC slender beams with moderate longitudinal reinforcement. The experimental program consisted of testing of eight simply supported RC slender beams subjected to two concentrated loads at a shear span to depth ratio (a/d) of 2.5 and equipped with varying shear reinforcement according to four different criteria. Ultimate shear strengths obtained in this experimental program are compared to the analytical shear strengths calculated according to existing as well as proposed equations. Test results exhibit that, the modified equation proposed in this work gives more accurate prediction of shear capacity of RC beams.

scholarly journals Strengthening of RC Beams Using Externally Bonded Reinforcement Combined with Near-Surface Mounted Technique

Polymers ◽  
2016 ◽  
Vol 8 (7) ◽  
pp. 261 ◽  
Author(s):  
Kh Darain ◽  
Mohd Jumaat ◽  
Ahmad Shukri ◽  
M. Obaydullah ◽  
Md. Huda ◽  
...  
Keyword(s):  
Rc Beams ◽  
Near Surface ◽  
Externally Bonded ◽  
Near Surface Mounted

Influence of Stirrup Corrosion on Shear Strength of RC Beams

2012 ◽  
Vol 204-208 ◽  
pp. 3287-3293
Author(s):  
Xin Xue ◽  
Hiroshi Seki ◽  
Yu Song
Keyword(s):  
Shear Strength ◽  
Mass Loss ◽  
Local Maximum ◽  
Shear Resistance ◽  
Shear Behavior ◽  
Shear Capacity ◽  
Maximum Mass ◽  
Rc Beams ◽  
Load Carrying ◽  
Maximum Mass Loss

There have been few reports on shear behavior of reinforced concrete (RC) beams with corroded stirrups, and the influence of stirrup corrosion has yet to be identified. Given this background, experience was carried out to investigate the shear behavior of RC beams containing corroded stirrups. Investigation results indicate that if the percentage local maximum mass loss is below 35%, there is little influence on the load-carrying mechanism. The concrete shear resistance seems to change little and the shear capacity can be calculated by just taking into consideration the reduction in stirrup shear resistance. It is also found that the anchorage conditions of the stirrups have a predominant influence on the shears of RC beams.

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