Influence of steel fibers and fiber-reinforced polymers on the impact resistance of one-way concrete slabs

Young Soo Yoon, Doo Yeol Yoo

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

In this study, to estimate the impact resistance of steel fiber-reinforced concrete slabs strengthened with fiber-reinforced polymer sheets, a series of 50 × 100 × 350 mm3 sized slabs with 0.5%-1.5% (by volume) of steel fibers and two types of fiber-reinforced polymer sheets were impact-tested using drop-weight impact test machine. From the test results, the maximum impact load, dissipated energy and the number of drops before failure were all increased, whereas the maximum deflection and support rotation were reduced by strengthening the steel fiber-reinforced concrete slabs with externally bonded fiber-reinforced polymer sheets in the tensile zone. It was noticed that the impact resistance of the steel fiber-reinforced concrete slabs was substantially improved by externally strengthening the fiber-reinforced polymer sheets. In addition, the dynamic response of the steel fiber-reinforced concrete slabs strengthened with fiber-reinforced polymer sheets under a low-velocity impact load was analyzed using explicit code LS-DYNA with strain rate-dependent material models and debonding failure analysis. These numerical analyses were verified by comparing with the experimental results.

Original languageEnglish
Pages (from-to)695-706
Number of pages12
JournalJournal of Composite Materials
Volume48
Issue number6
DOIs
Publication statusPublished - 2014 Mar

Keywords

  • Impact load
  • LS-DYNA
  • fiber-reinforced polymer
  • steel fiber-reinforced concrete
  • strain rate

ASJC Scopus subject areas

  • Ceramics and Composites
  • Mechanics of Materials
  • Mechanical Engineering
  • Materials Chemistry

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