Compressive and flexural behaviour of CFRP-repaired concrete-filled steel tubes after exposure to fire

Zhong Tao, Lin-Hai Han, LingLing Wang

    Research output: Contribution to journalArticle

    Abstract

    This paper presents the results of axial compression and bending tests of fire-damaged concrete-filled steel tubes (CFST) repaired using unidirectional carbon fibre reinforced polymer (CFRP) composites. Both circular and square specimens were tested to investigate the repair effects of CFRP composites on them. The test results showed that the CFRP jackets enhanced the load-bearing capacity of the stub columns effectively. Enhancement of the columns' stiffness due to the CFRP jackets was also observed. However, for beams, the test results demonstrated that the repair effect was not as good when compared with that for stub columns. From the test results, it is recommended that other appropriate repair measures should be taken in repairing severely fire-damaged CFST beams, or those members subjected to comparatively large bending moments.
    Original languageEnglish
    Number of pages11
    JournalJournal of Constructional Steel Research
    DOIs
    Publication statusPublished - 2007

    Keywords

    • axial loads
    • beams
    • carbon fibre reinforced polymers
    • columns
    • composite construction
    • concrete-filled tubes
    • fires
    • tubular steel structures

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