Residual properties of slabs that did not fail during a fire event

Yedidya M. Shachar, Avraham N. Dancygier

Research output: Contribution to conferencePaperpeer-review

Abstract

Exposure of reinforced concrete (RC) buildings to elevated temperatures during fire events can cause deterioration of the concrete and of the reinforcing steel properties up to failure and total collapse. However, RC columns, slabs and beams can withstand considerable fire events and remain stable after the fire has been extinguished. While evaluation of the residual capacity of RC structural elements that survived exposure to fire has been examined, other structural properties, such as flexural ductility, were not investigated. This paper presents initial results from a study of the residual, post-fire ductility of beams and one-way slabs. The methodology of this study comprises cross-sectional moment-curvature calculations, which are based on constitutive models of concrete and reinforcing steel that were exposed to given temperatures and then cooled off. These constitutive relations were verified by the researchers who published them and have been further verified by examination of their application in calculations for 20 degrees Celsius (i.e., without the temperature effect) and by comparison of the results with those obtained with well-established constitutive relations. Results from a case study of the evaluation for elevated temperatures show the importance of considering the residual ductility in addition to the load bearing capacity.

Original languageEnglish
Pages660-665
Number of pages6
StatePublished - 2019
Event5th fib Congress, FIB 2018 - Melbourne, Australia
Duration: 7 Oct 201811 Oct 2018

Conference

Conference5th fib Congress, FIB 2018
Country/TerritoryAustralia
CityMelbourne
Period7/10/1811/10/18

Keywords

  • Post-fire
  • Residual ductility
  • Residual moment capacity

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Building and Construction

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