Theoretical Study of RC Beam Strengthened with Prestressed CFRP Sheet Based on Classical Laminate Theory

LI Chun-liang, CHENG Yong-chun, HE Feng

China Journal of Highway and Transport ›› 2009, Vol. 22 ›› Issue (1) : 60-65.

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China Journal of Highway and Transport ›› 2009, Vol. 22 ›› Issue (1) : 60-65.
Original Article

Theoretical Study of RC Beam Strengthened with Prestressed CFRP Sheet Based on Classical Laminate Theory

  • LI Chun-liang1, CHENG Yong-chun2, HE Feng2
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Abstract

In order to study deformation law of bending of the reinforced concrete (RC) beam strengthened with prestressed CFRP sheets, the classical laminate theory was originally put forward. Authors established analytic formulas to calculate deflection, strain and the interface shear stress, and the mechanical properties of RC beam strengthened with prestressed CFRP sheet were calculated. The analytic formulas were used to illustrate the process of the delamination failure, rupture of CFRP sheet and crush of concrete. The results of calculations coincide with the result of tests. The results show that adopted method is available, and these research results provide theoretical basis for analysis of the RC beam strengthened with prestressed CFRP sheet.

Key words

bridge engineering / RC beam / classical laminate theory / prestress / CFRP sheet

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LI Chun-liang, CHENG Yong-chun, HE Feng. Theoretical Study of RC Beam Strengthened with Prestressed CFRP Sheet Based on Classical Laminate Theory[J]. China Journal of Highway and Transport, 2009, 22(1): 60-65

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