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CLC number: TU411

On-line Access: 2012-08-03

Received: 2011-11-17

Revision Accepted: 2012-02-27

Crosschecked: 2012-07-09

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Journal of Zhejiang University SCIENCE A 2012 Vol.13 No.8 P.571-583

10.1631/jzus.A1100317


Deflection analysis of reinforced concrete beams strengthened with carbon fibre reinforced polymer under long-term load action


Author(s):  Mykolas Daugevičius, Juozas Valivonis, Gediminas Marčiukaitis

Affiliation(s):  Department of Reinforced Concrete and Masonry Structures, Vilnius Gediminas Technical University, Saulėtekio Ave. 11, LT-10223 Vilnius, Lithuania

Corresponding email(s):   mykolas.daugevicius@vgtu.lt

Key Words:  Carbon fibre composite, Beam strengthening, Beam deflection, Long-term load, Bending stiffness, Concrete and carbon fibre composite interface stiffness, Effective inertia moment


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Mykolas Daugevičius, Juozas Valivonis, Gediminas Marčiukaitis. Deflection analysis of reinforced concrete beams strengthened with carbon fibre reinforced polymer under long-term load action[J]. Journal of Zhejiang University Science A, 2012, 13(1): 571-583.

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doi="10.1631/jzus.A1100317"
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%T Deflection analysis of reinforced concrete beams strengthened with carbon fibre reinforced polymer under long-term load action
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%A Gediminas Marčiukaitis
%J Journal of Zhejiang University SCIENCE A
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T1 - Deflection analysis of reinforced concrete beams strengthened with carbon fibre reinforced polymer under long-term load action
A1 - Mykolas Daugevičius
A1 - Juozas Valivonis
A1 - Gediminas Marčiukaitis
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Abstract: 
This paper presents the results of an experimental research on reinforced concrete beams strengthened with an external carbon fibre reinforced polymer (CFRP) layer under long-term load action that lasted for 330 d. We describe the characteristics of deflection development of the beams strengthened with different additional anchorages of the external carbon fibre composite layer during the period of interest. The conducted experiments showed that the additional anchorage influences the slip of the external layer with respect to the strengthened element. Thus, concrete and carbon fibre composite interface stiffness decreases with a long-term load action. Therefore, the proposed method of analysis based on the built-up-bars theory can be used to estimate concrete and carbon fibre composite interface stiffness in the case of long-term load.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

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