Load Test on Reinforced Concrete Beams Strengthened by Carbon Fiber Laminated Plates - A Case Study

2011 ◽  
Vol 87 ◽  
pp. 255-258
Author(s):  
Humayun R. H. Kabir ◽  
Abdul Lateef Al-Khaleefi
Keyword(s):  
Reinforced Concrete ◽  
Carbon Fiber ◽  
Carbon Fibers ◽  
Concrete Beams ◽  
Laminated Plates ◽  
Management Team ◽  
Load Test ◽  
Reinforced Concrete Beams ◽  
Interesting Observation

A load test was performed on reinforced concrete beams that were strengthened with carbon fibers. Seventy five thousands blocks were placed in four stages. A quality and management team worked continuously in the testing process. No creep effects were noticed with the use of carbon fiber plates, an interesting observation.

scholarly journals Experimental analysis of reinforced concrete beams strengthened in bending with carbon fiber reinforced polymer

2016 ◽  
Vol 9 (1) ◽  
pp. 123-152
Author(s):  
M. M. VIEIRA ◽  
A. R. S. SANTOS ◽  
A. M. MONT'ALVERNE ◽  
L. M. BEZERRA ◽  
L. C. S. MONTENEGRO ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Carbon Fiber ◽  
Carbon Fibers ◽  
Concrete Beams ◽  
Steel Reinforcement ◽  
Reinforced Concrete Beams ◽  
Fiber Reinforced Polymer ◽  
Carbon Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Reinforced Polymer

The use of carbon fiber reinforced polymer (CFRP) has been widely used for the reinforcement of concrete structures due to its practicality and versatility in application, low weight, high tensile strength and corrosion resistance. Some construction companies use CFRP in flexural strengthening of reinforced concrete beams, but without anchor systems. Therefore, the aim of this study is analyze, through an experimental program, the structural behavior of reinforced concrete beams flexural strengthened by CFRP without anchor fibers, varying steel reinforcement and the amount of carbon fibers reinforcement layers. Thus, two groups of reinforced concrete beams were produced with the same geometric feature but with different steel reinforcement. Each group had five beams: one that is not reinforced with CFRP (reference) and other reinforced with two, three, four and five layers of carbon fibers. Beams were designed using a computational routine developed in MAPLE software and subsequently tested in 4-point points flexural test up to collapse. Experimental tests have confirmed the effectiveness of the reinforcement, ratifying that beams collapse at higher loads and lower deformation as the amount of fibers in the reinforcing layers increased. However, the increase in the number of layers did not provide a significant increase in the performance of strengthened beams, indicating that it was not possible to take full advantage of strengthening applied due to the occurrence of premature failure mode in the strengthened beams for pullout of the cover that could have been avoided through the use of a suitable anchoring system for CFRP.

scholarly journals MECHANICAL BEHAVIOR TO SHEAR OF REINFORCED CONCRETE BEAMS REINFORCED WITH CARBON FIBERS BONDED WITH EPOXY ADHESIVE

2020 ◽  
Vol 5 (2) ◽  
Author(s):  
Thalles Manoel Quindeler de Paula Azevedo ◽  
Danilo De Souza Salgueiro Ferreira ◽  
Joel Sanchez Dominguez ◽  
Eduardo Martins Sampaio ◽  
Joaquim Teixeira de Assis
Keyword(s):  
Shear Stress ◽  
Reinforced Concrete ◽  
Carbon Fiber ◽  
Carbon Fibers ◽  
Concrete Beams ◽  
Epoxy Adhesive ◽  
Reinforced Concrete Beams ◽  
Structural Elements ◽  
Shear Reinforcement ◽  
Structural Adhesive

In Brazil, the concrete structure is widely used in civil construction. In this field, there is a common need to reinforce the structural elements, either by increasing the load, for calculation errors, flaws in the execution or modifications of use conditions. This experimental work aims to compare two reinforcement techniques with carbon fiber blanket on reinforced concrete beams submitted to shear stress. The tests will compare the results of reinforced concrete samples without any reinforcement, with shear reinforcement using carbon fiber blanket with techniques and materials popularly spread on the market. In this case using the structural adhesive S&P 220, and with shear reinforcement using carbon fiber blanket glued with structural adhesive NVT 201E.

Reliability-Based Balanced Condition for Strengthened RC Beams

2013 ◽  
Vol 756-759 ◽  
pp. 25-28 ◽  
Author(s):  
Chun Xia Li ◽  
Zhi Sheng Ding ◽  
Shi Lin Yan ◽  
Jun Ming Chen
Keyword(s):  
Reinforced Concrete ◽  
Carbon Fiber ◽  
Stress Distribution ◽  
Tensile Strain ◽  
Concrete Beams ◽  
Reinforced Concrete Beams ◽  
Experimental Result ◽  
Rc Beams ◽  
Yield Strain ◽  
Reliability Indicator

Based on the experimental result of the flexure capability of reinforced concrete beams strengthened by carbon fiber sheets, the stress distribution changes only after steel yielding and carbon fiber sheets function better. However serious the extent of the damage is before strengthened, the tensile strain of main steel reaches about 1.6 times of the yield strain for the secondary grade of steel as failure happens. To satisfy the object reliability indicator, reliability is analyzed using the ratio of the steel strain at the balanced failure to the yield strain as variable to obtain its optimum value, which is coincide with the experimental result, and makes better consistency between calculated reliability indicator and object reliability indicator.

Strengthening of Reinforced Concrete Beams by Carbon Fiber Composites

2018 ◽  
Vol 931 ◽  
pp. 379-384
Author(s):  
Yuri V. Ivanov ◽  
Yuri F. Rogatnev ◽  
Igor I. Ushakov
Keyword(s):  
Reinforced Concrete ◽  
Carbon Fiber ◽  
Bearing Capacity ◽  
Concrete Beams ◽  
Reinforced Concrete Beams ◽  
Carbon Fiber Composites ◽  
Limiting State ◽  
Reinforced Plastics ◽  
Reinforced Beams ◽  
The Given

The paper considers the results of the experimental study of the reinforced concrete beams strengthened by carbon fiber reinforced plastics (the CFRP). Eight reinforced concrete beams of the 80x160 mm section and 1500 mm designed span have been manufactured and tested. The influence of the number of the CFRP layers (strengthening power) on bearing capacity and rigidity under the static loading of beams in the thirds of the span has been studied. The results obtained indicate the increase in bearing capacity of the reinforced beams from 24% up to 55% and the increase in rigidity by 45% for the commonly adopted limiting state, i.e. achieving ultimate deformations in concrete of the compressed zone). The paper underlines the need for using anchor devices in the form of U-shaped binders to ensure the efficiency of the given method of strengthening.

Assessment of corroded reinforced concrete beams: Cyclic load test and acoustic emission techniques

2020 ◽  
Vol 233 ◽  
pp. 117291
Author(s):  
K.A. Shahid ◽  
N. Muhammad Bunnori ◽  
M.A. Megat Johari ◽  
Mohd H. Hassan ◽  
Ashiru Sani
Keyword(s):  
Acoustic Emission ◽  
Reinforced Concrete ◽  
Cyclic Load ◽  
Concrete Beams ◽  
Load Test ◽  
Reinforced Concrete Beams

scholarly journals Mechanical Behavior of Steel Fiber-Reinforced Concrete Beams Bonded with External Carbon Fiber Sheets

Materials ◽  
2017 ◽  
Vol 10 (6) ◽  
pp. 666 ◽  
Author(s):  
Viktor Gribniak ◽  
Vytautas Tamulenas ◽  
Pui-Lam Ng ◽  
Aleksandr K. Arnautov ◽  
Eugenijus Gudonis ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Carbon Fiber ◽  
Mechanical Behavior ◽  
Steel Fiber ◽  
Concrete Beams ◽  
Fiber Reinforced Concrete ◽  
Reinforced Concrete Beams ◽  
Fiber Reinforced ◽  
Steel Fiber Reinforced Concrete
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