Existing reinforced concrete (RC) structures often need to be repaired, strengthened and upgraded to satisfy current code requirements. In recent years many interventions have been done bonding composite materials to the surface of existing RC elements. The structural effectiveness of these interventions strongly depends on the bond between the strengthening material and the concrete and on the mechanical properties of the concrete cover. In this paper the bond between fiber reinforced cementitious matrix (FRCM) materials made out of a poliparafenilenbenzobisoxazole (PBO) net embedded in a cement based matrix and the concrete is analytically analyzed with reference to the approach generally adopted for the fiber reinforced polymers (FRP) materials, which is based on the local bond-slip relation between the strengthening fibers and the supporting concrete. A local bond-slip relation is calibrated on the base of the results of an experimental investigation previously performed by the authors. The bond-slip relation is essential in the modeling of the structural behavior of RC elements strengthened with PBO-FRCM, in that it allows to calculate the force that can be transferred to the concrete, the effective anchorage length, the concrete cracks distance and opening.

Bond-slip relations for PBO-FRCM materials externally bonded to concrete / A.D'Ambrisi; L.Feo; F.Focacci. - In: COMPOSITES. PART B, ENGINEERING. - ISSN 1359-8368. - STAMPA. - 43:(2012), pp. 2938-2949. [10.1016/j.compositesb.2012.06.002]

Bond-slip relations for PBO-FRCM materials externally bonded to concrete

D'AMBRISI, ANGELO;
2012

Abstract

Existing reinforced concrete (RC) structures often need to be repaired, strengthened and upgraded to satisfy current code requirements. In recent years many interventions have been done bonding composite materials to the surface of existing RC elements. The structural effectiveness of these interventions strongly depends on the bond between the strengthening material and the concrete and on the mechanical properties of the concrete cover. In this paper the bond between fiber reinforced cementitious matrix (FRCM) materials made out of a poliparafenilenbenzobisoxazole (PBO) net embedded in a cement based matrix and the concrete is analytically analyzed with reference to the approach generally adopted for the fiber reinforced polymers (FRP) materials, which is based on the local bond-slip relation between the strengthening fibers and the supporting concrete. A local bond-slip relation is calibrated on the base of the results of an experimental investigation previously performed by the authors. The bond-slip relation is essential in the modeling of the structural behavior of RC elements strengthened with PBO-FRCM, in that it allows to calculate the force that can be transferred to the concrete, the effective anchorage length, the concrete cracks distance and opening.
2012
43
2938
2949
A.D'Ambrisi; L.Feo; F.Focacci
File in questo prodotto:
File Dimensione Formato  
Comp PartB_D'Ambrisi et al_Bond-slip relations for PBO-FRCM materials externally bonded to concrete.pdf

Accesso chiuso

Tipologia: Versione finale referata (Postprint, Accepted manuscript)
Licenza: Tutti i diritti riservati
Dimensione 1.44 MB
Formato Adobe PDF
1.44 MB Adobe PDF   Richiedi una copia

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

Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/648718
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 194
  • ???jsp.display-item.citation.isi??? 164
social impact