Experimental investigation of high strength reinforced concrete columns damaged by fire and retrofitted with CFRP jackets

J. Xu, C. Tan, R. Aboutaha

Research output: Contribution to journalConference articlepeer-review

Abstract

This paper presents the compressive behaviour of high strength circular reinforced concrete (RC) columns exposed to fire following the standard fire curve for 1 or 2 hours, air cooled, and then retrofitted with 2 layers of transverse carbon fibre reinforced polymer (CFRP) wraps. Total 5 circular RC columns φ300mm x 1000mm) were tested to investigate the effects of fire duration and the effectiveness of CFRP jackets. The investigated compressive behaviour of columns included load-displacement relationship, CFRP load-strain response and failure mode. Large temperature gradient was observed when columns were exposed to fire. For the unretrofitted columns, the test results showed that the ultimate capacity and stiffness of fire-damaged RC columns was decreased due to the deterioration of concrete at elevated temperatures. Longer fire duration leads to more sever damaged on columns. CFRP jackets could effectively restore the stiffness and improve the ultimate capacity of fire-damaged circular columns.

Original languageEnglish (US)
Article number042009
JournalIOP Conference Series: Earth and Environmental Science
Volume358
Issue number4
DOIs
StatePublished - Dec 13 2019
Event2019 5th International Conference on Advances in Energy, Environment and Chemical Engineering, AEECE 2019 - Shanghai, China
Duration: Aug 16 2019Aug 18 2019

ASJC Scopus subject areas

  • Environmental Science(all)
  • Earth and Planetary Sciences(all)

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