Effect of Strength and Fiber Reinforcement on Fire Resistance of High-Strength Concrete Columns

Abstract

/npsi/ctrl?lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?lang=fr Access and use of this website and the material on it are subject to the Terms and Conditions set forth at http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=en NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. For the publisher's version, please access the DOI link below./ Pour consulter la version de l'éditeur, utilisez le lien DOI ci-dessous.http://dx.doi.org/10.1061/(ASCE) 0733-9445(2003)129:2(253) Journal of Structural Engineering, 129, 2, pp. 253-259, 2003-02-01 Effect of strength and fiber reinforcement on fire resistance of highstrength concrete columns Cheng, F. P.; Wang, T. C.; Sultan, M. A. ABSTRACTIn this paper, results from fire resistance experiments on five types of reinforced concrete columns are presented. The variables considered in the study include concrete strength (NSC and HSC), aggregate type (siliceous and carbonate aggregate), and fiber reinforcement (steel and polypropylene fibers). Data from the study is used to determine the structural behaviour of HSC columns at elevated temperatures. A comparison is made of the fire resistance performance of HSC columns with that of normal strength concrete (NSC) and fiber-reinforced HSC columns. The factors that influence the thermal and structural behaviour of HSC concrete columns under fire conditions are discussed. The results show that the fire resistance of a NSC column is higher than that of a HSC column. Also, the addition of polypropylene fibers and the use of carbonate aggregate improve fire resistance.

Predicting the fire resistance behaviour of high strength concrete columns

“…Based on detailed experimental studies on HSC columns, it was found that spalling occurs when temperatures in concrete reach above 350°C [7]. This is shown in Figure 3, which shows temperatures at various time intervals and the initiation of spalling, as observed during fire resistance test of column THC4.…”

“…Further, the presence of steel or polypropylene fibers and the type of aggregate in concrete influence the extent of spalling [7]. The spalling was highest in column THC4 which was made with siliceous aggregate.…”

“…Data from the experimental studies also showed that, while spalling occurs throughout the cross-section in the case of columns with straight ties, spalling occurs only outside the reinforcement core when the ties are bent in to the concrete core [5]. Further, the presence of steel or polypropylene fibers and the type of aggregate in concrete influence the extent of spalling [7]. The addition of fibers to concrete helps in minimising the extent of spalling in HSC members [8].…”

“…A detailed literature review revealed that while computer models have been established for determining the fire resistance of NSC columns, this is not the case with HPC columns [6,7]. Further, there is only limited test data available on the fire resistance of HPC columns [5,7].…”

Residual Axial Capacity Comparison of CFFT and RC Bridge Columns after Fire

“…Han et al [8] performed an experimental fire performance study of concrete-filled stainless steel tube columns directed toward off-shore structural applications. Kodur et al, has conducted several studies on the effects of fiber reinforcement, fly ash, and tie configuration on the fire performance of high-strength concrete (HSC) columns [9][10][11][12]. There have also been a significant number of studies conducted on fiber reinforced polymer (FRP) confined concrete columns, including those conducted by Green et al [13], Chowdury et al [14], Cree et al [15], Gefu et al [16], Bisby et al [17] and Kodur et al [18] to name a few.…”