复合楼板系统对标准火灾暴露的热响应。
Thermal response of a composite floor system to the standard fire exposure.
作者信息
Banerjee Dilip K
机构信息
National Institute of Standards and Technology, Material Measurement Laboratory, Gaithersburg, Maryland 20899; Ph: (301) 975-3568.
出版信息
Fire Saf J. 2020;111. doi: https://doi.org/10.1016/j.firesaf.2019.102930.
This paper discusses the development of a finite element (FE) model of a full-scale composite floor system and application of this model to predict the heating of steel members when exposed to a standard fire during fire resistance experiments. The model is verified by comparing the predicted heating profile of steel members at several locations during the tests with measured data. Such a verified model can be used to characterize the uncertainties in the prediction of the thermal history of structural elements exposed to a damaging fire. The output of this model can be used in a subsequent structural analysis model to determine the nonlinear behavior of structural members due to both thermal and mechanical loads. Additionally, the thermal effect of possible concrete spalling events and the resultant fireproofing dislodgement from steel members were numerically investigated and compared with measured data to determine the efficacy of the heat transfer model.
本文讨论了全尺寸组合楼板系统有限元（FE）模型的开发，以及该模型在耐火试验中预测钢构件暴露于标准火灾时受热情况的应用。通过将试验期间几个位置的钢构件预测受热曲线与实测数据进行比较，对该模型进行了验证。这样一个经过验证的模型可用于表征暴露于破坏性火灾的结构构件热历史预测中的不确定性。该模型的输出可用于后续的结构分析模型，以确定结构构件由于热荷载和机械荷载共同作用而产生的非线性行为。此外，对可能的混凝土剥落事件的热效应以及由此导致的防火层从钢构件上脱落的情况进行了数值研究，并与实测数据进行比较，以确定传热模型的有效性。
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