Journal of South China University of Technology(Natural Science) >

2019 , Vol. 47 >Issue 7: 1 - 9

DOI: https://doi.org/10.12141/j.issn.1000-565X.180645

Architecture & Civil Engineering

Axial Compression Behavior of CFRP-confined Damaged Reinforced Concrete

Expand
  •  1． School of Civil Engineering and Transportation，South China University of Technology，Guangzhou 510640，Guangdong，China; 2． Architectural Design and Research Institute，South China University of Technology，Guangzhou 510640，Guangdong，China; 3． State Key Laboratory of Subtropical Building Science，South China University of Technology，Guangzhou 510640，Guangdong，China
劳晓杰(1972-)，男，博士生，高级工程师，主要从事混凝土结构研究．

Received date: 2018-12-25

  Revised date: 2019-03-05

  Online published: 2019-06-01

Supported by

Supported by the National Natural Science Foundation of China (51378221)

Fold

Abstract

A total of 29 square reinforced concrete (RC) columns with different amounts of internal steel rein- forcement and of externally wrapped CFRP as well as pre-damage levels，were designed and tested under axial compression． On the basis of regression analysis of the test results，a stress-strain model for CFRP-confined da- maged reinforced concrete under axial compression was proposed． The test results show that CFRP wrapping is effec- tive in restoring or even enhancing the compressive strength and the strain capacity of damaged reinforced concrete． Both the compressive strength and the ultimate strain of CFRP-confined damaged reinforced concrete increase with the increase of the quantities of CFRP and the decrease of pre-damage levels，while the initial elastic modulus de- creases with the increase of pre-damage levels． Under cyclic loading，the envelope curve of cyclic stress-strain re- sponse of CFRP-confined damaged reinforced concrete under axial compression coincides with the monotonic coun- terpart． The prediction provided by the proposed model agrees well with the test results．

Key words： CFRP; reinforced concrete; axial compression behavior; repair; stress-strain model

Cite this article

LAO Xiaojie HAN Xiaolei JI Jing JIANG Zhengrong CHEN Binbin . Axial Compression Behavior of CFRP-confined Damaged Reinforced Concrete[J]. Journal of South China University of Technology(Natural Science), 2019 , 47(7) : 1 -9 . DOI: 10.12141/j.issn.1000-565X.180645

References

 
Options
Outlines

/

〈 〉