Effect of damage parameter variation on bond characteristics of CFRP-sheets bonded to concrete beams

2018 ◽  
Vol 185 ◽  
pp. 184-192 ◽  
Author(s):  
Xin-Ling Wang ◽  
Geng-Qi Zhao ◽  
Ke Li ◽  
Miao-Hao-Fu Li
Keyword(s):  
Concrete Beams ◽  
Parameter Variation ◽  
Damage Parameter ◽  
Cfrp Sheets ◽  
Bond Characteristics

Analysis on Deformation of Pre-Splitting Steel Reinforced Concrete Beams Strengthened by Prestressed CFRP

2011 ◽  
Vol 243-249 ◽  
pp. 929-933
Author(s):  
Na Ha ◽  
Lian Guang Wang ◽  
Shen Yuan Fu
Keyword(s):  
Reinforced Concrete ◽  
Bearing Capacity ◽  
Concrete Beams ◽  
Bending Moment ◽  
Reinforced Concrete Beams ◽  
Steel Reinforced Concrete ◽  
Cfrp Sheets ◽  
Deformation Curves ◽  
Prestressed Cfrp Sheets ◽  
Theoretical Results

In order to improve the bearing capacity of SRC which is related with deformation and stiffiness, SRC beams should be strengthened by CFRP. Based on the experiment of six pre-splitting steel reinforced concrete beams strengthened with (Prestressed) CFRP sheets, the deformation of beams are discussed. Load-deformation curves are obtained by the experiment. Considering the influence of intial bending moment on SRC beams, the calculated deformation formulas of SRC beams strengthened by (Prestressed) CFRP are deduced. The results showed that the load-deformation curves of normal and strengthened beams respectively showed three and two linear characteristics. The theoretical results which calculated by the formulas of deformation are well agreement with the experimental results.

Numerical Tracking of the Behavior of Repaired Reinforced Concrete Beams by CFRP Sheets against Shear

2020 ◽  
Vol 1002 ◽  
pp. 604-614
Author(s):  
Hayder Hussein H. Kammona ◽  
Muhammad Abed Attiya ◽  
Qasim M. Shakir
Keyword(s):  
Reinforced Concrete ◽  
Concrete Beams ◽  
Experimental Results ◽  
Reinforced Concrete Beams ◽  
Cfrp Sheets ◽  
Shear Span ◽  
Concrete Members ◽  
Suggested Technique ◽  
Cfrp Sheet ◽  
Failure Loads

This study simulates a procedure of rehabilitation of reinforced concrete beams with the aid of ANSYS 17 software. In this work, the BIRTH and DEATH procedure (in ANSYS) was adopted to model the post-repairing stage. This aspect has rarely been considered by previous studies that utilized a carbon fiber reinforced polymer (CFRP) sheet when retrofitting. To verify the suggested technique, six specimens were analyzed with two values of shear span-to-depth ratios (3 and 4) and three spaces of CFRP sheets (100mm, 150mm and 200mm). The effect of the repairing process on the structural performance of the retrofitted beam is also investigated.It is found that the suggested technique yielded a good agreement with the experimental results and the maximum differences in the failure loads between the numerical and experimental results were 10% and 4% for shear span-to-depth ratios of 3 and 4, respectively. It was also ascertained that upgrading reinforced concrete members within the early stages of loading showed a better enhancement in the loading capacity compared to upgrading reinforced concrete members close to the juncture of failure.

Research on Debonding Formula Model of RC Beams Strengthened with CFRP Sheets

2011 ◽  
Vol 368-373 ◽  
pp. 1038-1041
Author(s):  
An Hong Bao ◽  
Zhen Yu Qiu ◽  
Peng Wang
Keyword(s):  
Mechanical Properties ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Concrete Beams ◽  
Rc Beams ◽  
Element Analysis ◽  
Cfrp Sheets ◽  
The Finite Element Analysis ◽  
Fiber Plate ◽  
Addition Formulas

Debonding of concrete occurs when the interface principal stress reaches the ultimate tensile strength. We propose the use of carbon fiber plate attached to the beam bottom, which makes finite element analysis of the mechanical properties of debonding concrete beams more reasonable. In addition, formulas of this theory are given and applied in the finite element analysis. Finally, it is shown by a number of experimental results.

An Study on the Flexural Performance of Reninforced Concrete Beams Considering Loading History with Pre-Stressed Cfrp Sheets

2011 ◽  
Vol 105-107 ◽  
pp. 853-856
Author(s):  
Zhe Li ◽  
Gang Li ◽  
Qin Zhao ◽  
Shuai Zhang
Keyword(s):  
Concrete Beams ◽  
Reinforced Concrete Beams ◽  
Fiber Reinforced Polymer ◽  
Carbon Fiber Reinforced Polymer ◽  
Impact Factors ◽  
Cfrp Sheets ◽  
Flexural Performance ◽  
Reinforced Polymer ◽  
Secondary Load ◽  
Cfrp Sheet

For the effect of nonpre-stressed carbon fiber reinforced polymer (CFRP) Sheet Strengthening concrete beams to improve bending stiffness and crack resistance is not satisfactory, and it is difficult to totally unloading on the actual reinforcement, so in this paper, ANSYS is used to research the strengthened effectiveness and impact factors of pre-stressed CFRP reinforced concrete beams considering the secondary load.

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