Sensitivity study of time delay coefficient of heat transfer formulations for insulated steel members exposed to fire

Zhi Hua Wang, Kang Hai Tan

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

Heat transfer analysis for an insulated steel member exposed to fire conditions, in general, involves solving a 2D transient conduction equation with well-posed conditions. For design purpose, the current Eurocode 3 provisions adopt a closed-form solution from the SP approach which employs a simplified 1D characteristic heat transfer model. A virtual "time delay" has been incorporated in the analytical solution based on the assumption that the heat capacitance of insulation material is small compared to that of steel section. A sensitivity study is presented in this paper to assess the validity of the time delay coefficient. Results of the study indicate that for insulation with large heat capacitance, the time delay estimation in the SP approach yields significant discrepancy compared against exact solution. An exact formulation of time delay is recommended, which gives accurate results for insulation material with either small or large heat capacitance.

Original languageEnglish (US)
Pages (from-to)31-38
Number of pages8
JournalFire Safety Journal
Volume41
Issue number1
DOIs
StatePublished - Feb 1 2006
Externally publishedYes

Keywords

  • Fire
  • Heat transfer
  • Insulation
  • SP approach
  • Steel member
  • Time delay

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Safety, Risk, Reliability and Quality
  • Physics and Astronomy(all)

Fingerprint

Dive into the research topics of 'Sensitivity study of time delay coefficient of heat transfer formulations for insulated steel members exposed to fire'. Together they form a unique fingerprint.

Cite this