Experimental and numerical investigation of post-tensioned concrete flat slabs in fire

Y. Wei, F.T.K. Au, J. Li, Neil C.M. Tsang

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    1 Citation (Scopus)
    164 Downloads (Pure)

    Abstract

    Purpose: This paper aims to understand the structural fire performance of two-way post-tensioned flat slabs, particularly their deformations and load-carrying mechanisms in fire, and to explore the behaviour of post-tensioned high-strength self-compacting concrete flat slabs with unbonded tendons in fire. Design/methodology/approach: Four tests of post-tensioned high-strength self-compacting concrete flat slabs were conducted under fire conditions. Numerical modelling using the commercial package ABAQUS was conducted to help interpret the test results. Findings: Two of the specimens with lower moisture contents demonstrated excellent fire resistance performance, while the others with slightly higher moisture contents experienced severe concrete spalling. Originality/value: The test results were discussed in respect of thermal profiles, deflections, crack patterns and concrete spalling. The performance of post-tensioned high-strength self-compacting concrete flat slabs with unbonded tendons under fire conditions was better understood.
    Original languageEnglish
    Pages (from-to)2-18
    JournalJournal of Structural Fire Engineering
    Volume7
    Issue number1
    DOIs
    Publication statusPublished - 2016

    Bibliographical note

    This article is (c) Emerald Group Publishing and permission has been granted for this version to appear here https://curve.coventry.ac.uk/open/items/ce7f2ff9-cac2-405f-b640-7574a31fb3fd/1/ . Emerald does not grant permission for this article to be further copied/distributed or hosted elsewhere without the express permission from Emerald Group Publishing Limited.

    Keywords

    • Fire resistance
    • Concrete spalling
    • Fire
    • High-strength self-compacting concrete
    • Post-tensioned flat slab
    • Crack patterns

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