Thermo-mechanical compatibility of CFRP versus steel reinforcement for concrete at high temperature

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

Abstract

Optimization of the design of concrete structures has become a driver for the use of nonconventional reinforcing materials. One example of this is the emerging use of non-corrosive, highstrength, and lightweight carbon fibre reinforced polymer (CFRP) prestressing tendons. It is widely known that the bond between FRP reinforcing tendons and concrete deteriorates at elevated temperature due to a combination of factors. Lateral thermal expansion of FRP reinforcing tendons at elevated temperature has been shown to have consequences for the bond performance of these systems. This paper presents the results of an experimental study carried out to assess the occurrence of heat-induced longitudinal splitting cracks in concrete specimens reinforced with CFRP or steel prestressing tendons. A novel testing methodology, namely a Heat-Transfer Rate Inducing System (H-TRIS), is used to subject specimens to thermal loading which replicates that experienced by equivalent specimens in a standard fire resistance test. A comparison between CFRP and steel tendons is made, and the occurrence of longitudinal splitting cracks is evaluated in terms of the time to occurrence and thermal gradient within the concrete. Results are compared against an available analytical model.

Original languageEnglish
Title of host publicationProceedings of the 7th International Conference on FRP Composites in Civil Engineering, CICE 2014
EditorsRaafat El-Hacha
Place of PublicationVancouver
PublisherInternational Institute for FRP in Construction (IIFC)
Number of pages6
ISBN (Electronic)9781771363082
ISBN (Print)978-1-77136-308-2
Publication statusPublished - 1 Jan 2014
Event7th International Conference on FRP Composites in Civil Engineering, CICE 2014 - Vancouver, Canada
Duration: 20 Aug 201422 Aug 2014

Conference

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

Fingerprint Dive into the research topics of 'Thermo-mechanical compatibility of CFRP versus steel reinforcement for concrete at high temperature'. Together they form a unique fingerprint.

Cite this