Title

Static and fatigue analyses of RC beams strengthened with CFRP laminates

Authors

Authors

S. El-Tawil; C. Ogunc; A. Okeil;M. Shahawy

Comments

Authors: contact us about adding a copy of your work at STARS@ucf.edu

Abbreviated Journal Title

J. Compos. Constr.

Keywords

PRESTRESSED CONCRETE MEMBERS; Engineering, Civil; Mechanics; Materials Science, Composites

Abstract

Extensive testing has shown that externally bonded carbon fiber reinforced polymer (CFRP) laminates are particularly suited for improving the short-term behavior of deficient reinforced concrete beams. Accelerated fatigue tests conducted to date confirm that fatigue response is also improved. This paper describes an analytical model for simulating the static response and accelerated fatigue behavior of reinforced concrete beams strengthened with CFRP laminates. Static and fatigue calculations are carried out using a fiber section model that accounts for the nonlinear time-dependent behavior of concrete, steel yielding, and rupture of CFRP laminates. Analysis results are compared with experimental data from two sets of accelerated fatigue tests on CFRP strengthened beams and show good agreement. Cyclic fatigue causes a time-dependent redistribution of stresses, which leads to a mild increase in steel and CFRP laminate stresses as fatigue life is exhausted. Based on the findings, design considerations are suggested for the repair and/or strengthening of reinforced concrete beams using CFRP laminates.

Journal Title

Journal of Composites for Construction

Volume

5

Issue/Number

4

Publication Date

1-1-2001

Document Type

Article

Language

English

First Page

258

Last Page

267

WOS Identifier

WOS:000171756100008

ISSN

1090-0268

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