6533b82dfe1ef96bd1290be0
RESEARCH PRODUCT
Simple Plastic Model for Shear Critical SFRC Beams
Piero ColajanniAntonino RecuperoNino Spinellasubject
Materials sciencebusiness.industryMechanical EngineeringBuilding and ConstructionStructural engineeringFiber-reinforced concreteReinforced concreteSteel fibre reinforced concrete plastic theory design shear critical beamSteel fiber-reinforced concrete; Plastic theory; Shear critical beamslaw.inventionSettore ICAR/09 - Tecnica Delle CostruzioniCrackingShear (geology)Mechanics of MaterialslawUltimate tensile strengthShear strengthGeneral Materials ScienceGeotechnical engineeringSlippageArchbusinessCivil and Structural Engineeringdescription
A simple physical model, for prediction of ultimate shear strength of steel fiber reinforced concrete (SFRC) beams is developed on the basis of a plastic approach originally proposed for reinforced concrete (RC) beams without stirrups. It is founded on the hypothesis that cracks can be transformed into yield lines, and thus is know as Crack Sliding Model (CSM). First, the CSM is improved in order to take into account the shear strength increase for deep beams, due to the arch effect. Then, the effectiveness factors for fibrous concrete under biaxial stresses are evaluated, taking into account the post-cracking tensile strength of SFRC and its ability to control slippage along shear cracks. With the aim of providing a handy and fast tool for design of SFRC beams without stirrups, a simplified design model is also derived. Finally, the proposed models are validated by the results of a large set of experimental tests taken from literature.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2010-04-01 | Journal of Structural Engineering |