Temperature development in structural stainless steel sections exposed to fire
By L. Gardner, K. T. Ng. 2006
143 citations recorded by the source corpus.
Abstract The initial material cost of structural stainless steel is about four times that of structural carbon steel, due largely to the expense of the alloying elements and the relatively low volume of production. Given broadly similar structural performance, additional areas of benefit need to be identified and exploited in order to establish stainless steel as a viable alternative material for construction. In addition to the familiar benefits of corrosion resistance, low maintenance, high residual value and aesthetics, one such area is fire resistance. The mechanical and thermal properties of stainless steel differ from those of carbon steel due to variation in chemical composition between the materials. A comparison of these properties for austenitic stainless steel with those for structural carbon steel is presented herein, and implications of the differences explored. Accurate and efficient determination of the temperature development within a structural member upon subjection to fire is paramount. In this paper, comparisons of temperature development in structural stainless steel sections are made between existing test results, numerical simulations and the simple calculation model of Eurocode 3: Part 1.2. Based on these comparisons, revised values for the heat transfer coefficient and emissivity of structural stainless steel members exposed to fire are proposed. In the temperature development calculation model of EN 1993-1-2, it is proposed that emissivity be taken as 0.2 (in place of the currently adopted value of 0.4) and the heat transfer coefficient be taken as 35 W/m 2 K (in place of the currently adopted value of 25 W/m 2 K). The significance of such revisions to the fire resistance and critical temperature is assessed. Application of the revised values in the predictive models for member resistances at elevated temperatures in Eurocode 3: Part 1.2 also reveals improved agreement with test results on axially loaded stainless steel columns in fire, and average enhancements in fire resistance of 10%.
Subfields: Building and Construction, Civil and Structural Engineering
View Paper: https://www.semanticscholar.org/paper/4b8cdfddf9886c9fdeeb32c60c4f6e6a1416fab1
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Citations in the corpus
- Residual stress distributions in welded stainless steel sections (2014, unknown): “Residual stresses in structural stainless steel sections may differ significantly from those in carbon steel sections, owing to distinct differences in material and thermal properties [1,2].”
- Elevated temperature material properties of stainless steel alloys (2010, background): “A brief overview of the thermal properties of carbon steel and stainless steel , with an emphasis on the austenitic grades, these being the most widely adopted in construction, is reported herein; a more detailed account is available elsewhere [14].”
- Residual stress analysis of structural stainless steel sections (2008, background): “In addition to the fundamental differences in the form of the stress-strain response between stainless steel and carbon steel, there is also variation in thermal properties, including specific heat, thermal conductivity and thermal expansion [13, 32], all of which will influence the formation of res”
- Numerical analysis and thermographic investigation of induction heating (2010, unknown): “4 [17].”
- Extremely low cycle fatigue tests on structural carbon steel and stainless steel (2010, background): “Stainless steel also exhibits more substantial strain hardening than carbon steel, with greater ratios of ultimate tensile strength to yield strength, greater levels of elongation at fracture and differences in other physical and thermal properties [21].”
- Cross-section stability of lean duplex stainless steel welded I-sections (2013, background): “The physical and thermal properties of stainless steel differ from those of carbon steel, hence residual stress patterns and magnitudes arising in structural sections may differ [28].”
- Performance of concrete filled stainless steel tubular (CFSST) columns and joints: Summary of recent research (2019, background): “The specific heat of stainless steel is approximately 550 J/kg K as compared with approximately 600 J/kg K for carbon steel [52].”