6533b861fe1ef96bd12c5a4a
RESEARCH PRODUCT
Ultimate Shear of RC Beams with Corroded Stirrups and Strengthened with FRP
Piero ColajanniAntonino RecuperoFrancesco TondoloNino Spinellasubject
Modified Compression Field TheoryBeams; Corrosion; FRP; MCFT; Parametric analysis; Reinforced concrete; Shear; Stirrups; Civil and Structural Engineering; Building and ConstructionMaterials science0211 other engineering and technologies020101 civil engineering02 engineering and technologyshearstirrupslcsh:TH1-97450201 civil engineeringCorrosioncorrosion; stirrups; shear; FRP; MCFT; reinforced concrete; beams; parametric analysisBrittleness021105 building & constructionArchitectureMCFTCivil and Structural EngineeringEnvironmental Science (all)corrosion2300Parametric analysibusiness.industryBeamStructural engineeringBuilding and ConstructionFibre-reinforced plasticBeams; Corrosion; FRP; MCFT; Parametric analysis; Reinforced concrete; Shear; Stirrups; Architecture; 2300; Environmental Science (all); Civil and Structural Engineering; Building and ConstructionReinforced concretereinforced concreteStirrupShear (geology)parametric analysisbeamsbusinessFailure mode and effects analysisFRPlcsh:Building constructiondescription
Transverse reinforcement plays a key role in the response behavior of reinforced concrete beams. Therefore, corrosion of steel stirrups may change the failure mode of elements from bending to shear, leading to a brittle and catastrophic crisis. It is important to strengthen reinforced concrete beams with corroded stirrups to enhance the shear resistance. This paper presents a formulation, based on the modified compression field theory, to estimate the ultimate shear of reinforced concrete beams strengthened with FRP, because of stirrup corrosion. The detrimental effect of corrosion on steel stirrup yield strength was taken into account by introducing an empirical decay law. The effective strain of FRP reinforcement was adequately evaluated by considering both debonding and tensile stress rupture. The proposed model was validated against collected experimental results, showing a good ability to evaluate shear strength. Moreover, a numerical analysis was carried out to highlight the role of the key parameters predicting the ultimate shear.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2019-01-29 | Buildings; Volume 9; Issue 2; Pages: 34 |