Structure and Infrastructure Engineering · 2013 · 13 citations · 8 references
EngineeringMaterials EngineeringMaterials ScienceStructural AnalysisStructural EngineeringStructural MaterialsBending Of BeamsConcrete MaterialsFiber-reinforced CompositesReinforced Concrete StructuresStrength Of MaterialsStress AnalysisCarbon Fiber Reinforced CompositesCarbon Fiber Reinforced PolymersEffective Stress AnalysisExternal PrestressingLoad-carrying CapacityReinforced ConcreteReinforced Concrete StrengtheningStructural Strengthening
AbstractIn this study, the load-carrying capacities of reinforced concrete (RC) beams strengthened with carbon-fibre-reinforced polymer (CFRP) and external tendons were compared. The effective stress of the RC beams was estimated by analysing the experimental reinforcing effect and the resulting behaviour of each specimen. It was found that the strengthening effect of CFRP was affected by the initial damage in the RC beams. On the other hand, in external post-tensioning, application of strain induced an initial effective stress in the RC beams. As a result, the effective stress of these RC beams was reduced and their performance was improved. Furthermore, it was found that the strengthening effect of external tendons used to strengthen in-service RC beams can be predicted by a finite element analysis.Keywords:: external post-tensioningeffective stresscarbon-fibre-reinforced polymerreinforced concrete beamsfinite element analysis
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