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    Effects of partial fire protection on temperature developments in steel joints protected by intumescent coating

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    Publication date
    2009
    Author
    Dai, Xianghe
    Wang, Y.C.
    Bailey, C.G.
    Keyword
    Steel-concrete composite joints; Partial fire protection; Intumescent coating; Temperature; Fire tests; Fire resistance; Unprotected bolts; REF 2014
    Fire protection; Temperature distribution; Steel joints; Intumescent coating
    Peer-Reviewed
    Yes
    
    Metadata
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    Abstract
    This paper presents experimental results of temperature distribution in fire in four typical types of steel-concrete composite joint (web cleat, fin plate, flush endplate and flexible endplate) with different fire-protection schemes. The test specimens were unloaded and the steelwork of each joint assembly was exposed to a standard fire condition [ISO 834, 1975: Fire Resistance Tests, Elements of Building Construction, International Organization for Standardization, Geneva] in a furnace. In total, 14 tests were conducted, including 4 tests without any fire protection and 10 tests with different schemes of fire protection. The main objective of these tests was to investigate the effects of three practical fire-protection schemes as alternatives to full fire protection of the entire joint assembly. The three alternative methods of fire protection were: (1) protecting a segment, instead of the entire length, of the beams; (2) unprotected bolts and (3) protecting the columns only. The main results of these tests are: (1) if all the steel work (excluding the bolts) in the joint assembly was protected, whether or not protecting the bolts had very little effect on temperatures in the protected steelwork other than the bolts. The bolt temperatures were higher if they were not protected than if they were protected, but the unprotected bolt temperatures in a joint with fire protection to other steelwork were much lower than bolt temperatures in a totally unprotected joint; (2) as far as joint temperatures are concerned, protecting a segment of 400 mm of the beam was sufficient to achieve full protection and (3) if only the column was protected, only the joint components that were in the immediate vicinity of the column (such as welds) developed noticeably lower temperatures than if the joint assembly was unprotected, but due to heat conduction from the unprotected steel beams, these temperature values were much higher than if the joint assembly was protected. Furthermore, the column temperatures in the joint region were much higher than the protected column temperatures.
    URI
    http://hdl.handle.net/10454/5951
    Version
    No full-text in the repository
    Citation
    Dai X, Wang YC and Bailey CG (2009) Effects of partial fire protection on temperature developments in steel joints protected by intumescent coating. Fire Safety Journal. 44(3): 376-386.
    Link to publisher’s version
    http://dx.doi.org/10.1016/j.firesaf.2008.08.005
    Type
    Article
    Collections
    Engineering and Informatics Publications

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