Fatigue life prediction of RC beams strengthened with prestressed CFRP under cyclic bending loads

With the prestressed carbon fiber reinforced polymer (CFRP) strengthening technique widely used in reinforced concrete (RC) structures, it is more and more important to study the fatigue performance of RC structures. Since the fracture of a tensile steel bar at the main cracked section is the leading reason for the failure of RC beams reinforced by prestressed CFRP, a fatigue life prediction model of RC beams reinforced by prestressed CFRP was developed based on an accumulative damage model. Moreover, gradual degradation of the performance of the concrete was considered in the fatigue life prediction model. An experimental study was also conducted to research the fatigue behavior of RC beams reinforced by prestressed or non-prestressed carbon fiber laminate (CFL). During the tests, fatigue crack patterns were captured using a digital image correlation (DIC) technique, and the fatigue lives of a total of 30 beams were recorded. The results showed that the predicted main crack propagation curves and the fatigue lives were close to the experimental data. This study also exhibited that the prestressed CFRP could reduce the stress of main steel bars in RC beams and effectively improve the fatigue performance of the RC beams.

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Development of EIFS-based corrosion fatigue life prediction approach for corroded RC beams

Engineering Fracture Mechanics ◽

10.1016/j.engfracmech.2019.01.016 ◽

2019 ◽

Vol 209 ◽

pp. 1-16 ◽

Cited By ~ 2

Author(s):

Junzu Sun ◽

Zhiheng Ding ◽

Qiao Huang

Keyword(s):

Fatigue Life ◽

Corrosion Fatigue ◽

Life Prediction ◽

Fatigue Life Prediction ◽

Rc Beams ◽

Prediction Approach

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Research on Fretting Fatigue Life of Interference Fit and its Influencing Factors

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.251.293 ◽

2012 ◽

Vol 251 ◽

pp. 293-300 ◽

Cited By ~ 1

Author(s):

Chang Wu Huang ◽

Guang Xue Yang ◽

Nian Jun Fu ◽

Ji Long Xie

Keyword(s):

Fatigue Life ◽

Life Prediction ◽

Prediction Models ◽

Fretting Fatigue ◽

Damage Parameter ◽

Fatigue Life Prediction ◽

Element Analysis ◽

Interference Fit ◽

Bending Loads ◽

Fretting Damage

Interference-Fit Components, Especially under Rotating Bending Loads, Usually Suffer Fretting Fatigue, which Tremendously Reduces Service Lives of the Components. by Taking Specimens with Different Interference-Fit Parameters for Fatigue Test, their Fretting Fatigue Lives Could Be Obtained. and through Using Finite Element Analysis (FEA) Software ABAQUS, the Ruiz Fretting Damage Parameter K(x) for each Tested Fatigue Specimen Were Achieved. then, According to the Test Data and the Results of Calculations, Two Fretting-Fatigue Life Prediction Models (model 1：N=c•K-α, and Model 2：N=λN0—m•Kn) )based on the Ruiz Fretting Damage Parameter Were Fitted, and their Ratλionalities and Validities Were Analyzed. at the same Time, the Influences of Interference-Fit Parameters -Interference Value (V), Casing outside Diameter (D), and Casing Length (L), Contact Pressure (p) and Friction Shear Stress (τ) on Fretting Fatigue Life Have Been Analyzed. the Results Showed that the Two Fitalic Textretting Fatigue Life Prediction Models Used in this Paper Were Valid, but, in Contrast, the Second One Was More Accurate and Rational; and that Fretting Fatigue Life (N) Decreased as V, D, L, P or τ Increasing.

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