EXPERIMENTAL STUDY ON THE FLEXURAL BEHAVIOR OF CONCRETE BEAMS PRESTRESSED WITH AFRP TENDONS

Tu Yongming; Zhang Jiwen; Qian Yang; Chen Jie

doi:10.13204/j.gyjz200904017

Volume 39 Issue 4

Dec. 2014

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Tu Yongming, Zhang Jiwen, Qian Yang, Chen Jie. EXPERIMENTAL STUDY ON THE FLEXURAL BEHAVIOR OF CONCRETE BEAMS PRESTRESSED WITH AFRP TENDONS[J]. INDUSTRIAL CONSTRUCTION, 2009, 39(4): 72-76. doi: 10.13204/j.gyjz200904017

Citation:

Tu Yongming, Zhang Jiwen, Qian Yang, Chen Jie. EXPERIMENTAL STUDY ON THE FLEXURAL BEHAVIOR OF CONCRETE BEAMS PRESTRESSED WITH AFRP TENDONS[J]. INDUSTRIAL CONSTRUCTION, 2009, 39(4): 72-76. doi: 10.13204/j.gyjz200904017

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EXPERIMENTAL STUDY ON THE FLEXURAL BEHAVIOR OF CONCRETE BEAMS PRESTRESSED WITH AFRP TENDONS

doi: 10.13204/j.gyjz200904017

1.
1. Key Lab of C&PC Structure of Ministry of Education,Southeast University,Nanjing 210096,China;
2.
2. Architectural Design and Research Institute,Southeast University,Nanjing 210096,China;
3.
3. Nanjing Municipal Institute of Civil Architecture,Nanjing 210002,China

Received Date: 2008-06-16
Publish Date: 2009-04-20

Abstract

Abstract

A group of simple beams prestressed with AFRP tendons or steel strand have been tested.The effect of several factors,such as the reinforcement ratios of AFRP tendon and steel rebar,the prestressing force,etc,on the load-carrying capacity of the beams is investigated.And the cracking load,the ultimate load,the load-deflection relationship,the crack development,the plane-section assumption,and the strain developments of AFRP tendon and steel reinforcement are discussed.The results demonstrate: the whole mechanical process of the concrete beam prestressed with AFRP tendons can be idealized to the trilinear relationship.The first stage is from loading to cracking,the second to yield of the tension steel,and the third to the ultimate load-carrying capacity.Although the AFRP tendon material has no the yielding plateau,the beams prestressed with AFRP tendons show clear deformation signs before collapsing because of the low elastic modulus of the AFRP material.When the beams collapse,the AFRP tendon will not always reach the ultimate strain value and its strain can be calculated with the plane-section assumption.In addition,the ultimate load-carrying capacity of the beams can be improved by increasing the prestressing force.
- AFRP tendon,
- flexural behavior,
- plane-section assumption,
- ultimate load-carrying capacity,
- load-deflection curve

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References(5)

References

GB500102002混凝土结构设计规范[S];

[2] 吕志涛,孟少平.现代预应力设计[M].北京:中国建筑工业出版社,1998;

[3] 孟履祥,陶学康,关建光,等.芳纶纤维筋有黏结部分预应力混凝土梁受弯性能研究.土木工程学报[J],2006,39(3):10-18;

[4] Toutanji H,Saafi M.Performance of Concrete Beams Prestressed withAramid Fiber-Reinforced Polymer Tendons[J].Composite Structures,1999,44(1):63-70;

[5] Ferraira AJ M,Camanho P P,Marques A T,et al.Modeling ofConcrete Beams Reinforced with FRP Re-bars[J].CompositeStructures,2001,53(1):107-116.

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