Study on Interfacial Shear Stress in RC Beams Strengthened with Prestressed FRP Laminates

Abstract:

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Reinforced concrete (RC) beams strengthened with prestressed fiber-reinforced polymer (FRP) laminates has been proved to be a rather effective strengthening technique in the field of bridge engineering. However, debonding failure usually occurs at the end of FRP in the strengthened beams on releasing the prestress due to the high interfacial shear stress. Analytical method to calculate the interfacial stress is developed in this paper. Through the establishment of mathematical model for the interfacial shear stress, the distribution of the interfacial shear stress and the longitudinal stress of FRP are presented explicitly in an analytical way. Moreover, the maximum prestress level is estimated to prevent debonding failure on releasing the prestress. Finally, experimental results of eight strengthened beams validate the analytical solution for the FRP longitudinal stress.

Info:

Periodical:

Advanced Materials Research (Volumes 33-37)

Edited by:

Wei Yang, Mamtimin Geni, Tiejun Wang and Zhuo Zhuang

Pages:

507-514

DOI:

10.4028/www.scientific.net/AMR.33-37.507

Citation:

J.H. Xie et al., "Study on Interfacial Shear Stress in RC Beams Strengthened with Prestressed FRP Laminates", Advanced Materials Research, Vols. 33-37, pp. 507-514, 2008

Online since:

March 2008

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Price:

$35.00

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