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http://dx.doi.org/10.1007/s40069-017-0191-x

Fatigue Assessment Model of Corroded RC Beams Strengthened with Prestressed CFRP Sheets  

Song, Li (School of Civil Engineering, Central South University)
Hou, Jian (Department of Civil Engineering, Xi'an Jiaotong University)
Publication Information
International Journal of Concrete Structures and Materials / v.11, no.2, 2017 , pp. 247-259 More about this Journal
Abstract
This paper presents a fatigue assessment model that was developed for corroded reinforced concrete (RC) beams strengthened using prestressed carbon fiber-reinforced polymer (CFRP) sheets. The proposed model considers the fatigue properties of the constituent materials as well as the section equilibrium. The model provides a rational approach that can be used to explicitly assess the failure mode, fatigue life, fatigue strength, stiffness, and post-fatigue ultimate capacity of corroded beams strengthened with prestressed CFRP. A parametric analysis demonstrated that the controlling factor for the fatigue behavior of the beams is the fatigue behavior of the corroded steel bars. Strengthening with one layer of non-prestressed CFRP sheets restored the fatigue behavior of beams with rebar at a low corrosion degree to the level of the uncorroded beams, while strengthening with 20- and 30%-prestressed CFRP sheets restored the fatigue behavior of the beams with medium and high corrosion degrees, respectively, to the values of the uncorroded beams. Under cyclic fatigue loading, the factors for the strengthening design of corroded RC beams fall in the order of stiffness, fatigue life, fatigue strength, and ultimate capacity.
Keywords
fatigue assessment model; corrosion; reinforced concrete beam; prestressed CFRP sheets;
Citations & Related Records
Times Cited By KSCI : 6  (Citation Analysis)
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