Mechano-sorptive creep in reinforced glulam

Conan O'Ceallaigh, Karol Sikora, Daniel McPolin, Annette M. Harte

Research output: Contribution to conferencePaperpeer-review

Abstract

An investigation was carried out to examine the effect of reinforcement on the creep behaviour of FRP reinforced timber elements in a controlled variable climate. Creep is accelerated by moisture variations due to a variable climate. This is termed the mechano-sorptive effect. In this paper, both unreinforced and reinforced beams are subjected to long-term creep tests loaded to a common maximum compressive stress of 8 MPa. The relative humidity of the variable climate was cycled between 65 ± 5% and 90 ± 5% every four weeks while the temperature remained constant at 20 ± 2°C. After 75 weeks, the total deflection and creep deflection of the reinforced beams was reduced by 16.46% and 8.37%, respectively, compared to the unreinforced beams. The results have shown that the creep behaviour of the unreinforced and reinforced beams is heavily influenced by the variable climate and it was found that the reduction in total deflection and creep deflection is statistically significant after just the first relative humidity cycle.

Original languageEnglish
Publication statusPublished - 2018
Externally publishedYes
Event2018 World Conference on Timber Engineering, WCTE 2018 - Seoul, Korea, Republic of
Duration: 20 Aug 201823 Aug 2018

Conference

Conference2018 World Conference on Timber Engineering, WCTE 2018
Country/TerritoryKorea, Republic of
CitySeoul
Period20/08/1823/08/18

Keywords

  • FRP
  • Mechano-sorptive creep
  • Reinforced timber
  • Sitka spruce
  • Viscoelastic creep

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