This paper examines the structural behavior of masonry arches strengthened at the intrados with fabric reinforced cementitious matrix (FRCM) composites. Textiles made of poliparafenilenbenzobisoxazole (PBO) and carbon fibers are considered. The experimental results are compared with those obtained on unstrengthened arches and arches strengthened with a carbon fiber reinforced polymer (CFRP) composite. The arches tested are analyzed with the approach of the limit analysis of the collapse mechanisms. For the FRCM strengthened arches the maximum fibers strain has been assumed equal to the maximum strain attained by the fibers during double shear bond tests previously performed, while for the FRP strengthened arches the maximum fibers strain has been assumed equal to the debonding strain evaluated according to the CNR (Italian National Research Council) guidelines. The employed approach allowed to accurately estimate the collapse load of the arches strengthened with FRP material, while the collapse loads of the arches strengthened with FRCM materials evaluated based on the results of the double shear tests underestimate the failure loads of the arches.

Intrados strengthening of brick masonry arches with different FRCM composites: Experimental and analytical investigations

ALECCI, VALERIO;Focacci, Francesco
Conceptualization
;
De Stefano, Mario
2017-01-01

Abstract

This paper examines the structural behavior of masonry arches strengthened at the intrados with fabric reinforced cementitious matrix (FRCM) composites. Textiles made of poliparafenilenbenzobisoxazole (PBO) and carbon fibers are considered. The experimental results are compared with those obtained on unstrengthened arches and arches strengthened with a carbon fiber reinforced polymer (CFRP) composite. The arches tested are analyzed with the approach of the limit analysis of the collapse mechanisms. For the FRCM strengthened arches the maximum fibers strain has been assumed equal to the maximum strain attained by the fibers during double shear bond tests previously performed, while for the FRP strengthened arches the maximum fibers strain has been assumed equal to the debonding strain evaluated according to the CNR (Italian National Research Council) guidelines. The employed approach allowed to accurately estimate the collapse load of the arches strengthened with FRP material, while the collapse loads of the arches strengthened with FRCM materials evaluated based on the results of the double shear tests underestimate the failure loads of the arches.
File in questo prodotto:
Non ci sono file associati a questo prodotto.

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/11389/24750
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 71
  • ???jsp.display-item.citation.isi??? 56
social impact