Heat transfer analysis of special reinforced NSC-columns under severe fire conditions

• Published in: International journal of materials research Vol. 101; no. 3; pp. 417 - 430
• Main Author: Sismanis, Panagiotis G.
• Format: Journal Article
• Language: English
• Published: Munich De Gruyter 01.03.2010; Hanser
• Subjects: Applied sciences; Bars; Casing (process); Computation; Computational heat-transfer; Computer simulation; Conduction; Convection; Exact sciences and technology; Fire; Fires; Frames; Heat conduction; Heat transfer; Hydrocarbons; Integrity; Mathematical analysis; Mathematical models; Metals. Metallurgy; Normal-strength concrete; Reinforcing steels; Strength; Temperature distribution; Temperature profiles; Normal-strength concrete; Conduction; Computational heat-transfer; Fire; Application; Strength; Heat transfer; Reinforced concrete
• ISSN: 1862-5282; 2195-8556
• DOI: 10.3139/146.110290

The 3-D heat conduction equation was numerically solved and the temperature distribution inside two special metallic frames, loaded with the proper number of reinforced bars, encased by normal strength concrete in the final columnar form, and subject to intense fire conditions, was computed by time. Typical temperature profiles were applied for the simulation of the cellulosic and hydrocarbon kinds of fire. Heat transfer by radiation and convection was included in the surrounding the column medium under fire, testing various convective heat-transfer coefficients. Computational results were analyzed until the critical time period in which the integrity and the mechanical strength of the column were reversible, considering fire abatement until that time.