Analysis of the fatigue behavior of reinforced concrete beams strengthened in flexure with fiber reinforced polymer laminates

Charalambidi, Barbara G.; Rousakis, Theodoros; Karabinis, Athanasios I.

doi:10.1016/j.compositesb.2016.04.014

Cited by 51 publications

(22 citation statements)

References 14 publications

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“…At present, many researchers have carried out experimental research on fatigue properties of FRP bars and concrete members with FRP strengthened [ 27 , 28 , 29 , 30 , 31 , 32 ], which mainly focused on the fatigue properties of FRP bars/concrete members with FRP strengthened at room temperature. Refai [ 33 ] found that there was a significant difference in the fatigue life for FRP bars with different fiber types at the same stress level.…”

Section: Introductionmentioning

confidence: 99%

Fatigue Behavior of Glass Fiber-Reinforced Polymer Bars after Elevated Temperatures Exposure

Zhao

Wang

2018

Materials

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Fiber-reinforced polymer (FRP) bars have been widely applied in civil engineering. This paper presents the results of an experimental study to investigate the tensile fatigue mechanical properties of glass fiber-reinforced polymer (GFRP) bars after elevated temperatures exposure. For this purpose, a total of 105 GFRP bars were conducted for testing. The specimens were exposed to heating regimes of 100, 150, 200, 250, 300 and 350 °C for a period of 0, 1 or 2 h. The GFRP bars were tested with different times of cyclic load after elevated temperatures exposure. The results show that the tensile strength and elastic modulus of GFRP bars decrease with the increase of elevated temperature and holding time, and the tensile strength of GFRP bars decreases obviously by 19.5% when the temperature reaches 250 °C. Within the test temperature range, the tensile strength of GFRP bars decreases at most by 28.0%. The cyclic load accelerates the degradation of GFRP bars after elevated temperature exposure. The coupling of elevated temperature and holding time enhance the degradation effect of cyclic load on GFRP bars. The tensile strength of GFRP bars after elevated temperatures exposure at 350 °C under cyclic load is reduced by 50.5% compared with that at room temperature and by 36.3% compared with that after exposing at 350 °C without cyclic load. In addition, the elastic modulus of GFRP bars after elevated temperatures exposure at 350 °C under cyclic load is reduced by 17.6% compared with that at room temperature and by 6.0% compared with that after exposing at 350 °C without cyclic load.

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Section: Introductionmentioning

confidence: 99%

Fatigue Behavior of Glass Fiber-Reinforced Polymer Bars after Elevated Temperatures Exposure

Zhao

Wang

2018

Materials

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“…There has been considerable interest in the fatigue behaviour of reinforced concrete beams and bridge girders strengthened or retrofitted by FRP laminates. The crucial factors and the significant influence on fatigue performance have been investigated in detail in these references [24][25][26][27]. Also, the fatigue failure criteria for…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Experimental study on fatigue performance of adhesively bonded anchorage system for CFRP tendons

Xie

Tang

Wang

et al. 2018

Composites Part B: Engineering

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This study is concerned with the fatigue performance of adhesively bonded anchorage for carbon fiber reinforced polymer (CFRP) tendons subjected to cyclic loading. Series of monotonous and cyclic experiments under different stress amplitudes and loading frequencies were carried out in order to investigate the mechanical performance of bonded anchorage systems for CFRP tendons and to study the influence of cyclic loading on the anchoring performance. The fatigue damage and the relationships between damage, loading frequency and interfacial temperature rise of anchorage systems were analyzed. The results show that cyclic tension-tension loading is instrumental in enhancing the synergistic interaction between the anchorage components and it also stabilizes the entire anchorage system performance provided that the stress amplitude is kept lower than 10% of the ultimate tensile capacity of the anchorage systems and the maximum stress is less than 50% of the ultimate capacity of the anchorage system. The loading frequency influences significantly the temperature variation in the anchorage system. A high loading frequency may result in a sharp temperature rise at the early-stage and mid-stage of cyclic tension-tension loading, followed by a rather stable late stage. This phenomenon of temperature rise during fatigue tests may indicate the extent of fatigue damage in the anchorage system.

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“…Short-term and long-term experiments have showed that strengthening RC beams with CFRP can delay steel yielding [ 1 , 2 , 3 , 4 , 5 , 6 ]. Evenly, if steel yielding is reached or steel is rusted, the strengthened beams can serve until the rupture, delamination of the CFRP layer, steel fatigue fracture, or concrete crashing are achieved [ 7 , 8 , 9 , 10 , 11 ]. Due to high strength and high elasticity, the tensioned layer of CFRP can intercept tensile forces (stresses) when the yielding of reinforcement is reached.…”

Section: Introductionmentioning

confidence: 99%

Prediction of Deflection of Reinforced Concrete Beams Strengthened with Fiber Reinforced Polymer

2019

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The article analyses the calculation of the deflection of reinforced concrete beams strengthened with fiber reinforced polymer. This paper specifically focuses on estimating deflection when the yielding of reinforcement is reached. The article proposes a simple method for calculating deflection that was compared with the experimentally predicted deflection. The carried out comparison has showed that the proposed method is suitable not only for the strengthened beams but also for the reinforced concrete beams with a varying reinforcement ratio. The suggested calculation method is based on the effective moment of inertia, such as the one introduced in the ACI Committee 318 Building Code Requirement for Structural Concrete (ACI318). The development of deflection was divided into three stages, and equations for the effective moment of inertia were proposed considering separate stages. In addition, the put forward equations were modified attaching additional relative coefficients evaluating a change in the depth of the neutral axis.

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Analysis of the fatigue behavior of reinforced concrete beams strengthened in flexure with fiber reinforced polymer laminates

Cited by 51 publications

References 14 publications

Fatigue Behavior of Glass Fiber-Reinforced Polymer Bars after Elevated Temperatures Exposure

Fatigue Behavior of Glass Fiber-Reinforced Polymer Bars after Elevated Temperatures Exposure

Experimental study on fatigue performance of adhesively bonded anchorage system for CFRP tendons

Prediction of Deflection of Reinforced Concrete Beams Strengthened with Fiber Reinforced Polymer

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