Heat transfer principles in thermal calculation of structures in fire

Published: November 01, 2015

Author(s)

Chao Zhang, Usmani Asif

Abstract

Structural fire engineering (SFE) is a relatively new interdisciplinary subject, which requires a comprehensive knowledge of heat transfer, fire dynamics and structural analysis. It is predominantly the community of structural engineers who currently carry out most of the structural fire engineering research and design work. The structural engineering curriculum in universities and colleges do not usually include courses in heat transfer and fire dynamics. In some institutions of higher education, there are graduate courses for fire resistant design which focus on the design approaches in codes. As a result, structural engineers who are responsible for structural fire safety and are competent to do their jobs by following the rules specified in prescriptive codes may find it difficult to move toward performance-based fire safety design which requires a deep understanding of both fire and heat. Fire safety engineers, on the other hand, are usually focused on fire development and smoke control, and may not be familiar with the heat transfer principles used in structural fire analysis, or structural failure analysis. This paper discusses the fundamental heat transfer principles in thermal calculation of structures in fire, which might serve as an educational guide for students, engineers and researchers. Insights on problems which are commonly ignored in performance based fire safety design are also presented.
Citation: Fire Safety Journal
Volume: 78
Pub Type: Journals

Keywords

Structural fire analysis, Heat transfer, Fire resistance, Steel member, Thermal calculation, Flashover, Lumped heat capacity method, Flame radiation, Conduction, Thermal resistance, Section factor, Localized fire, Large enclosure
Created November 01, 2015, Updated November 10, 2018