Modelling and verification of response of RC slabs strengthened in flexure with mechanically fastened FRP laminates

A. Napoli, F. Matta, E. Martinelli, Antonio Nanni, R. Realfonzo

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Mechanically fastened fibre-reinforced polymer laminate systems are emerging as a promising means for the repair and strengthening of reinforced concrete members. This technology entails the use of pultruded carbon- and glassvinyl ester fibre-reinforced polymer laminates with enhanced longitudinal bearing strength that are connected to the concrete substrate by means of steel anchors. Attractive applications are those for emergency repairs where constructability and speed of installation are critical requirements. In this paper, an experimental investigation is first presented that included laboratory testing of scaled reinforced concrete slabs strengthened with four different combinations of laminate lengths and fastener layouts to study optimised strengthening configurations. Compelling evidence was gained on the influence of the partial interaction between reinforced concrete slabs and mechanically fastened fibre-reinforced polymer laminates on the flexural response arising predominantly from bearing of the fasteners on to the fibre-reinforced polymer laminate. A numerical study is presented where the proposed finiteelement procedure incorporates non-linear constitutive models for materials and the concrete-fibre-reinforced polymer interface. For the latter, an accurate and simplified, conservative bilinear stress-slip model is successfully implemented and verified to evaluate applicability for analysis and design purposes.

Original languageEnglish
Pages (from-to)593-605
Number of pages13
JournalMagazine of Concrete Research
Volume62
Issue number8
DOIs
StatePublished - Aug 1 2010
Externally publishedYes

Fingerprint

Laminates
Polymers
Bearings (structural)
Fibers
Reinforced concrete
Concrete slabs
Fasteners
Repair
Concretes
Steel
Constitutive models
Anchors
Esters
Carbon
Testing
Substrates

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Materials Science(all)

Cite this

Modelling and verification of response of RC slabs strengthened in flexure with mechanically fastened FRP laminates. / Napoli, A.; Matta, F.; Martinelli, E.; Nanni, Antonio; Realfonzo, R.

In: Magazine of Concrete Research, Vol. 62, No. 8, 01.08.2010, p. 593-605.

Research output: Contribution to journalArticle

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