DOI: 10.5176/2301-394X_ACE18.40
Authors: Mohammad Al-Qaralleh, Houssam Toutanji
Abstract:
Strengthening reinforced concrete (RC) beams with externally bonded fiber reinforced polymers (EBFRP) has gain interest in the civil engineering field in the past 3 decades. Numerous studies investigated the behavior of such strengthening system under monotonic loading. However, its fatigue behavior still lacks a comprehensive understanding. This study investigates the effect of regular overloading on the fatigue life of RC beams strengthened with EBFRP. This study includes 5 RC beams with dimensions of 152.4×152.4×1500 mm strengthened with 1 layer of Carbon (C) FRP attached to its soffits. One beam tested monotonically to serve as a reference and the others tested under four points flexural fatigue loading. The pattern of the fatigue loading was chosen to simulate the real-world loading on bridges. When compared to the literature; the results show that overloading alters the fatigue life of the strengthened beams. A narrow band of overloading that is equal or less than 120% the background loading enhanced the fatigue performance. While overloading greater than 140% of the background loading significantly reduces the fatigue life of the beams.
Keywords: component; overloading, cumulative damage, fatigue, four points bending, externally bonded FRP.
Updating...