Punching Shear Strength Considering Cumulative Damage for FRP Strengthened Bridge Decks under Fatigue Loading

Cheol Woo Park; Jong Sung Sim; Tai Sik Lee

doi:10.4028/www.scientific.net/KEM.324-325.1313

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Synthesis and Characterization of the ZnO-TiO₂ Nanoparticles by a Hydrothermal Processing
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Optimization Conditions of Spot Welding Using Genetic Algorithm
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A Bi-Material Wedge – a Model for the Prediction of Failure Initiation at Shape and Material Discontinuities
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Damage Detection Based on ESPI and SVM
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Punching Shear Strength Considering Cumulative Damage for FRP Strengthened Bridge Decks under Fatigue Loading
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Quasi-Brittle Fracture of Lamellar γTiAl: Simulation Using a Cohesive Model with Stochastic Approach
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Fatigue Threshold of Nitrided and Shot Peened Specimens
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Analysis of Premature Rip-Off Failure Mechanism of Reinforced Concrete Beams Strengthened with FRPs
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Punching Shear Strength Considering Cumulative Damage for FRP Strengthened Bridge Decks under Fatigue Loading

Abstract:

This study investigates the punching shear strength of concrete bridge decks strengthened with various fiber reinforced polymer (FRP) materials, carbon fiber sheet (CFS), glass fiber sheet (GFS) and carbon fiber grid (CFG). This study performed fatigue loading tests on the strengthened bridge decks with different fatigue loading levels. Based on the experimental results, a damage index was determined considering the damage mechanics and was applied to the plastic punching shear strength model for the evaluation of the punching shear strength with respect to the number of fatigue loading cycles. The developed model seems to successfully estimate the punching shear strength of damaged bridge decks with sufficient reliability. It is anticipated, therefore, that the developed model may help improving the design of strengthening of damaged bridge deck panels.