화재시 콘크리트 요소 폭렬영향성 고찰

Translated title of the contribution: Review of Spatting Effect on Concrete Element in Fire

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Abstract

Concrete is generally accepted to have good inherent fire resistance. It mainly relies on the assumption that concrete has low heat-transfer characteristic and spalling does not occur during the course of a fire. However, the significant numbers of fire accidents have shown in recent years that incidence of spalling has caused sever damages to many structures. This review has systematically investigated the behaviour of concrete in fire, including phenomenon of spalling, with respect to the theorical consideration and experimental results. Explosive spalling is caused by the build-up of water vapor pressure in concrete subjected to increasing temperatures. When this pressure exceeds the tensile strength of the concrete over a fire-exposed area, explosive spalling can result in a typical temperature range between 200℃ and 400℃. The major functions are known to be moisture content, pore pressure, load ratio, and heating regime.
Translated title of the contributionReview of Spatting Effect on Concrete Element in Fire
Original languageKorean
Pages (from-to)54-63
Number of pages9
JournalJournal of Korean Institute of Fire Science and Engineering
Volume21
Issue number2
Publication statusPublished (in print/issue) - Jun 2007

Keywords

  • spalling
  • moisture content
  • pore pressure
  • load ratio
  • heating regime

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