STUDY ON SECONDARY LOAD BEHAVIOR OF REINFORCED CONCRETE BEAM STRENGTHENED WITH PRESTRESSED CFRP PLATE

Peng Hui; Zhang Jianren; Shang Shouping

doi:10.13204/j.gyjz201103021

Volume 41 Issue 3

Dec. 2014

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Article Navigation > INDUSTRIAL CONSTRUCTION > 2011 > 41(3): 108-112

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Peng Hui, Zhang Jianren, Shang Shouping. STUDY ON SECONDARY LOAD BEHAVIOR OF REINFORCED CONCRETE BEAM STRENGTHENED WITH PRESTRESSED CFRP PLATE[J]. INDUSTRIAL CONSTRUCTION, 2011, 41(3): 108-112. doi: 10.13204/j.gyjz201103021

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STUDY ON SECONDARY LOAD BEHAVIOR OF REINFORCED CONCRETE BEAM STRENGTHENED WITH PRESTRESSED CFRP PLATE

doi: 10.13204/j.gyjz201103021

1.
1. School of Civil Engineering and Architecture,Changsha University of Science &Technology,Changsha 410076,China;
2.
2. Civil Engineering College,Hunan University,Changsha 410082,China

Received Date: 2010-03-25
Publish Date: 2011-03-20

Abstract

Abstract

Prestressing CFRP technique is a new retrofit method which gained more and more attention in recent years,but there is little research on the secondary load behavior of flexual member strengthened using prestressed CFRP plate at home and abroad.In this paper 2 reinforced concrete beams,which have a length of 7.2 m,were retrofitted with non-prestressed CFRP and prestressed CFRP respectively,and then were tested to investigate their secondary load performance.Based on the experiment result,the comparison of behavior between beam with non-prestressed CFRP plate and beam strengthened using prestressed CFRP after pre-loading was conducted.Furthermore,the advantages of flexual stiffness,ductility and material strength ratio were obtained through analyzing.The experiment result indicated that although having been loaded to its steel yielding before being strengthened,the specimen with prestressed CFRP plate had a bearing capacity no less than that with non-prestressed CFRP plate.Despite the degradation of its section,the defletion of the secondary load specimen was almost the same as the control specimen,which showed that strengthening reinforced concrete beams pre-loaded severely using prestressed CFRP plate could recover their flexural stiffness significantly.
- prestressed,
- CFRP plate,
- reinfroced concrete beam,
- secondary load behavior,
- strengthen

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References(13)

References

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