Table of Contents Author Guidelines Submit a Manuscript
Mathematical Problems in Engineering
Volume 2014, Article ID 238515, 12 pages
http://dx.doi.org/10.1155/2014/238515
Research Article

Methods for Prediction of Steel Temperature Curve in the Whole Process of a Localized Fire in Large Spaces

1School of Safety Engineering, China University of Mining and Technology, Xuzhou 221116, China
2Jiangsu Key Laboratory for Environmental Impact and Structural Safety in Civil Engineering, Xuzhou 221116, China
3Institute of Industry Technology, Guangzhou and Chinese Academy of Sciences, Guangzhou 510000, China

Received 4 October 2013; Revised 2 December 2013; Accepted 10 December 2013; Published 5 January 2014

Academic Editor: Oluwole Daniel Makinde

Copyright © 2014 Zhang Guowei et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Based on a full-scale bookcase fire experiment, a fire development model is proposed for the whole process of localized fires in large-space buildings. We found that for localized fires in large-space buildings full of wooden combustible materials the fire growing phases can be simplified into a fire with a 0.0346 kW/s2 fire growth coefficient. FDS technology is applied to study the smoke temperature curve for a 2 MW to 25 MW fire occurring within a large space with a height of 6 m to 12 m and a building area of 1 500 m2 to 10 000 m2 based on the proposed fire development model. Through the analysis of smoke temperature in various fire scenarios, a new approach is proposed to predict the smoke temperature curve. Meanwhile, a modified model of steel temperature development in localized fire is built. In the modified model, the localized fire source is treated as a point fire source to evaluate the flame net heat flux to steel. The steel temperature curve in the whole process of a localized fire could be accurately predicted by the above findings. These conclusions obtained in this paper could provide valuable reference to fire simulation, hazard assessment, and fire protection design.