期刊
COMPOSITES PART B-ENGINEERING
卷 91, 期 -, 页码 371-383出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesb.2016.01.023
关键词
Fibres; Hybrid; Corrosion; Numerical analysis
资金
- Scientific and Technological Research Council of Turkey (TUBITAK) [1059B191400826]
A numerical method for estimating the curvature, deflection and moment capacity of reinforced concrete beams strengthened with prestressed near-surface-mounted (NSM) FRP bars/strips is presented. A sectional analysis is carried out to predict the moment curvature relationship from which beam deflections and moment capacity are then calculated. Based on the amount of FRP bars, different failure modes were identified, namely tensile rupture of prestressed FRP bars and concrete crushing before or after yielding of steel reinforcement. Comparisons between experimental results available in the literature and predicted curvature, moment capacity and deflection of reinforced concrete beams with prestressed NSM FRP reinforcements show good agreement. A parametric study concluded that higher prestressing levels improved the cracking and yielding loads, but decreased the beam ductility compared with beams strengthened with nonprestressed NSM FRP bars/strips. (C) 2016 Elsevier Ltd. All rights reserved.
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