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.

Spinella N., COLAJANNI, P., Recupero, A. (2010). SIMPLE PLASTIC MODEL FOR SHEAR CRITICAL SFRC BEAMS. JOURNAL OF STRUCTURAL ENGINEERING, 136, 390-400 [10.1061/(ASCE)ST.1943-541X.0000127].

SIMPLE PLASTIC MODEL FOR SHEAR CRITICAL SFRC BEAMS

COLAJANNI, Piero;
2010-01-01

Abstract

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.
2010
Settore ICAR/09 - Tecnica Delle Costruzioni
Spinella N., COLAJANNI, P., Recupero, A. (2010). SIMPLE PLASTIC MODEL FOR SHEAR CRITICAL SFRC BEAMS. JOURNAL OF STRUCTURAL ENGINEERING, 136, 390-400 [10.1061/(ASCE)ST.1943-541X.0000127].
File in questo prodotto:
File Dimensione Formato  
2010_asce.pdf

accesso aperto

Descrizione: Articolo principale
Dimensione 1.23 MB
Formato Adobe PDF
1.23 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/101229
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 36
  • ???jsp.display-item.citation.isi??? 35
social impact