Simple method for predicting temperatures in insulated FRP-strengthened RC members exposed to fire

Wan Yang Gao, Jianguo Dai, Jinguang Teng

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

Fire insulation layers are often provided to protect fiber-reinforced polymer (FRP)-strengthened RC members. For the fire resistance evaluation of these insulated members, accurate prediction of temperatures in the member under fire is a pre-requisite. Although for a given fire insulation scheme, the temperature analysis can be conducted using a finite-difference (FD) or finite element (FE) procedure, a much simpler, approximate method is highly attractive for practical design purposes. This paper presents such an approximate design-oriented method for predicting temperatures in insulated FRP-strengthened RC members under a standard fire exposure. The proposed method consists of two sets of formulae: (1) a set of formulae for predicting temperatures in un-protected RC members exposed to a standard fire; and (2) a set of formulae through which the fire insulation layer is converted into an equivalent concrete layer; the latter is expressed as a function of the thickness and the thermal properties of the insulation layer. As a result, the temperature analysis of insulated FRP-strengthened RC members becomes that of un-protected RC members with enlarged sectional dimensions. The accuracy of the proposed method is demonstrated through comparisons with results of existing standard fire tests.
Original languageEnglish
Title of host publicationProceedings of the 7th International Conference on FRP Composites in Civil Engineering, CICE 2014
PublisherInternational Institute for FRP in Construction (IIFC)
ISBN (Electronic)9781771363082
Publication statusPublished - 1 Jan 2014
Event7th International Conference on FRP Composites in Civil Engineering, CICE 2014 - Vancouver Campus of the University of British Columbia, Vancouver, Canada
Duration: 20 Aug 201422 Aug 2014

Conference

Conference7th International Conference on FRP Composites in Civil Engineering, CICE 2014
Country/TerritoryCanada
CityVancouver
Period20/08/1422/08/14

ASJC Scopus subject areas

  • Polymers and Plastics
  • Civil and Structural Engineering

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