The strategy to simulate the crack shear stress transfer in a fixed smeared crack model for concrete is crucial to correctly predict the deformational and cracking behavior of RC elements that exhibit shear failure. This work presents a shear softening law able to correctly simulate the shear stiffness degradation and stress transfer during the crack opening. In cracked concrete, the element of the matrix corresponding to the fracture mode II is represented here by a τtcr-γtcr diagram, describing the shear behavior of the ith crack. The predictive performance is evaluated simulating RC beams failing in shear strengthened using the Embedded Through-Section Technique. According to this technique holes are opened through the cross section, with the desired inclination, and steel or FRP bars are introduced into these holes and bonded to the concrete substrate with adhesive materials. The parameters influencing the shear softening law are analyzed through a parametric study, furthermore a simple rule to estimate these parameters is provided and its predictive performance is assessed. The presented approach represents a valid alternative to the shear retention function.

Strategies for numerical modeling the behavior of RC beams strengthened in shear using the ETS technique

BREVEGLIERI, Matteo
Primo
;
APRILE, Alessandra
Penultimo
;
2016

Abstract

The strategy to simulate the crack shear stress transfer in a fixed smeared crack model for concrete is crucial to correctly predict the deformational and cracking behavior of RC elements that exhibit shear failure. This work presents a shear softening law able to correctly simulate the shear stiffness degradation and stress transfer during the crack opening. In cracked concrete, the element of the matrix corresponding to the fracture mode II is represented here by a τtcr-γtcr diagram, describing the shear behavior of the ith crack. The predictive performance is evaluated simulating RC beams failing in shear strengthened using the Embedded Through-Section Technique. According to this technique holes are opened through the cross section, with the desired inclination, and steel or FRP bars are introduced into these holes and bonded to the concrete substrate with adhesive materials. The parameters influencing the shear softening law are analyzed through a parametric study, furthermore a simple rule to estimate these parameters is provided and its predictive performance is assessed. The presented approach represents a valid alternative to the shear retention function.
2016
Breveglieri, Matteo; Barros, J. A. O.; Aprile, Alessandra; Ventura Gouveia, A.
File in questo prodotto:
File Dimensione Formato  
Breveglieri et Al_2016.pdf

solo gestori archivio

Tipologia: Full text (versione editoriale)
Licenza: NON PUBBLICO - Accesso privato/ristretto
Dimensione 9.27 MB
Formato Adobe PDF
9.27 MB Adobe PDF   Visualizza/Apri   Richiedi una copia
Breveglieri_Barros_Aprile_Gouveia_ES_2016_preprint.pdf

accesso aperto

Tipologia: Post-print
Licenza: Creative commons
Dimensione 5.76 MB
Formato Adobe PDF
5.76 MB Adobe PDF Visualizza/Apri

I documenti in SFERA 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/11392/2359533
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 7
  • ???jsp.display-item.citation.isi??? 6
social impact