Delamination occurrence in engineered mass timber products at elevated temperatures

Richard Emberley, Zeyu Yu, Dilum Fernando, José L. Torero

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

An experimental study was conducted to elucidate the effects of thermal penetration on delamination and the potential changes in failure mode of CLT. The first test series studied thermal penetration depths at various heat fluxes. The second test series consisted of single lap shear tests at homogeneous elevated temperatures followed by a third test series that used the results of the previous tests to study the overall behaviour of CLT as a thermal wave progressed through the material. If charring progresses at similar rates as the thermal wave, then failure due to loss of cross section prevails. Results from the tests showed that the thermal penetration depth before the onset of charring increases at lower heat fluxes. Bond lines with elevated temperatures affected the failure mode of CLT beams. If the thermal wave propagates much faster than charring, then bond failure dominates the behaviour of the beams. The evolution of the thermal loads exhibited in compartment fires therefore have the potential to change the failure mode of CLT members from charring timber failure to cohesion failure with delamination of timber plies.

Original languageEnglish
Title of host publicationWCTE 2016 - World Conference on Timber Engineering
PublisherVienna University of Technology
ISBN (Electronic)9783903039001
Publication statusPublished - 2016
Event2016 World Conference on Timber Engineering, WCTE 2016 - Vienna, Austria
Duration: 22 Aug 201625 Aug 2016

Publication series

NameWCTE 2016 - World Conference on Timber Engineering

Conference

Conference2016 World Conference on Timber Engineering, WCTE 2016
Country/TerritoryAustria
CityVienna
Period22/08/1625/08/16

Keywords

  • Delamination
  • Failure modes
  • Fire
  • Mass timber products
  • Thermal penetration depth

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