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A Methodology for Predicting Temperature Distribution inside Concrete Pavement under A Pool Fire

机译：一种预测池火灾中混凝土路面温度分布的方法

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摘要

Understanding the internal temperature distribution of concrete is critical to further determine the variation characteristics of its thermo-mechanical properties. Due to the complexity of heat transfer during the combustion of pool fires, the internal temperature distribution of concrete under its influence is much different from that under uniform high-temperature field. In this work, a systematic mathematical model was proposed to predict the temperature distribution inside concrete pavement under the action of pool fire, and a series of corresponding experiments were conducted to validate the prediction results. Heat transfer process during pool fire combustion and heat dissipation process of high-temperature concrete after pool fire extinction were both analyzed in detail. A comprehensive heat transfer coefficient was used to predict the temperature distribution in combustible liquid. Temperature control discretization equations inside the concrete in both the processes of pool fire combustion and extinction were derived. The established mathematical model was implemented by MATLAB programming. Finally, corresponding experiments were conducted to verify the model prediction results, and the results showed that the two were in good agreement. The results obtained in this work can facilitate a better understanding of the design and maintenance of concrete pavement.
机译：了解混凝土的内部温度分布对于进一步确定其热机械性能的变化特性至关重要。由于池火灾燃烧过程中传热的复杂性，其影响下的混凝土的内部温度分布与均匀高温场下的混凝土不同。在这项工作中，提出了一种系统的数学模型，以预测池火的作用下混凝土路面的温度分布，并进行了一系列相应的实验以验证预测结果。池燃烧过程中的传热过程在池灭火后高温混凝土散热过程均详细分析。综合传热系数用于预测可燃液体中的温度分布。衍生池燃烧和消灭过程中混凝土内部温度控制离散方程。建立的数学模型由Matlab编程实施。最后，进行了相应的实验以验证模型预测结果，结果表明，这两个是良好的一致性。在这项工作中获得的结果可以促进更好地了解混凝土路面的设计和维护。

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