Concrete plates with externally bonded FRP under contact detonations

Rodrigo Mourão, Andreia Caçoilo, Filipe Teixeira-Dias, David Lecompte, Tim Stratford

Research output: Contribution to journalArticlepeer-review

Abstract

Local damage on concrete elements subjected to a contact detonation include spalling and cratering of the back and front face, respectively. This paper presents the results of a detailed experimental and numerical methodology aiming to analyse the influence of externally bonded fibre reinforced polymers (FRP) on the spalling phenomena of concrete when it is subjected to contact explosions. The influence of externally bonded reinforcement (EBR) on the diameter and depth of the spalling is experimentally investigated, as is also the total momentum transferred to the ejected fragments when their mass increases. The experimental observations enable the development of a computational framework, where a finite element (FE) model is validated and used to perform a through-thickness analysis focused on the stress wave propagation and associated damage mechanisms. It is found that the extent of concrete volumetric damage is highly influenced by the mass of the bonded material, as well as increased bonded areas leading to enlarged surface damage. Additionally, it was verified that the compressive strength of concrete plays a major role in the spall damage.
Original languageEnglish
Article number125073
JournalConstruction and Building Materials
Volume310
Early online date23 Oct 2021
DOIs
Publication statusPublished - 6 Dec 2021

Keywords

  • Blast loading
  • Concrete
  • Externally bonded reinforcement
  • Spalling
  • Stress wave

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