A simple physical model, for prediction of ultimate shear strength of steel fiber reinforcedconcrete (SFRC) beams is developed on the basis of a plastic approach originally proposed forreinforced concrete (RC) beams without stirrups. It is founded on the hypothesis that cracks can betransformed into yield lines, and thus is know as Crack Sliding Model (CSM). First, the CSM is improvedin 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 accountthe post-cracking tensile strength of SFRC and its ability to control slippage along shear cracks. Withthe aim of providing a handy and fast tool for design of SFRC beams without stirrups, a simplifieddesign model is also derived. Finally, the proposed models are validated by the results of a large set ofexperimental tests taken from literature.
|Numero di pagine||11|
|Rivista||Journal of Structural Engineering|
|Stato di pubblicazione||Published - 2010|
All Science Journal Classification (ASJC) codes