Calculation method for temperature rise of aluminum alloy structural members in large-space fires

被引：0
|
作者：
Guo X. [1 ]
Chen C. [1 ]
Zhu S. [1 ]
Zhang C. [1 ]
机构：
[1] College of Civil Engineering, Tongji University, Shanghai
来源：
Zhu, Shaojun (zhushaojun@tongji.edu.cn) | 1600年 / Science Press卷 / 42期
关键词：
Aluminum alloy; Fire radiation; Large-space fire; Temperature rise of member;
D O I：
10.14006/j.jzjgxb.2019.0876
中图分类号：
学科分类号：
摘要：
In the process of performance-based fire design, the calculation method for the temperature rise of structural members in fire has a significant influence on the design results. In order to study the calculation method for the temperature rise of aluminum alloy structural members in large-space fires, as well as the influence of the flame radiation on the temperature rise, two aluminum alloy specimens with commonly used sections were tested in fire. The experimental results show that the temperature of the specimens is close to that of the surrounding air due to the fire radiation. Based on the heat transfer differential equation of aluminum alloy structural members, the calculation methods for the temperature rise of aluminum alloy members under compartment fires and large-space fires were proposed and compared with the experimental results. The analysis results show that the ignorance of the effect of fire radiation on the calculation of temperature rise of aluminum alloy members in large-space fires will lead to unconservative results. The proposed method based on point fire assumption for calculating the radiative heat flux of the fire is more accurate and simpler than the method recommended by Eurocode. In addition, the emissivity of smoke under the fire radiation has great influence on the calculation of the temperature rise of members. A practical formula was fitted based on the experimental results.The results of the formula agree well with the experimental results. © 2021, Editorial Office of Journal of Building Structures. All right reserved.
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页码：118 / 126
页数：8
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