The present paper investigates the advantages of the use of steel fibre reinforced concrete for the realization of the lining of the Galleria Naturale Muro tunnel. For the present case study, the benefits of the steel fibres are particularly evident when the serviceability limit states are concerned. In fact, the crack-bridging effect of the fibres reduces significantly the crack width for a given stress field. An optimization criterion for the lining thickness is proposed here, considering concretes with different amounts of steel fibres. The goal is to assure a given value of the maximum crack width with a reduced thickness of the lining.
Concrete crack reduction in tunnel linings by SFRC
BURATTI, NICOLA;FERRACUTI, BARBARA;SAVOIA, MARCO
2011
Abstract
The present paper investigates the advantages of the use of steel fibre reinforced concrete for the realization of the lining of the Galleria Naturale Muro tunnel. For the present case study, the benefits of the steel fibres are particularly evident when the serviceability limit states are concerned. In fact, the crack-bridging effect of the fibres reduces significantly the crack width for a given stress field. An optimization criterion for the lining thickness is proposed here, considering concretes with different amounts of steel fibres. The goal is to assure a given value of the maximum crack width with a reduced thickness of the lining.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
