陈昊东, 王青松, 孙金华. 火灾环境下玻璃首次破裂时间的模拟预测[J]. 工程力学, 2017, 34(增刊): 210-213. DOI: 10.6052/j.issn.1000-4750.2016.03.S042
引用本文: 陈昊东, 王青松, 孙金华. 火灾环境下玻璃首次破裂时间的模拟预测[J]. 工程力学, 2017, 34(增刊): 210-213. DOI: 10.6052/j.issn.1000-4750.2016.03.S042
CHEN Hao-dong, WANG Qing-song, SUN Jin-hua. NUMERICAL PREDICTION ON THE FIRST BREAKING TIME OF GLASS IN FIRE CONDITIONS[J]. Engineering Mechanics, 2017, 34(增刊): 210-213. DOI: 10.6052/j.issn.1000-4750.2016.03.S042
Citation: CHEN Hao-dong, WANG Qing-song, SUN Jin-hua. NUMERICAL PREDICTION ON THE FIRST BREAKING TIME OF GLASS IN FIRE CONDITIONS[J]. Engineering Mechanics, 2017, 34(增刊): 210-213. DOI: 10.6052/j.issn.1000-4750.2016.03.S042

火灾环境下玻璃首次破裂时间的模拟预测

NUMERICAL PREDICTION ON THE FIRST BREAKING TIME OF GLASS IN FIRE CONDITIONS

  • 摘要: 在火灾环境中,玻璃因受热产生热应力,当热应力大于其自身的临界破裂应力时,会导致玻璃破裂甚至脱落。玻璃在火灾环境下的破裂,会进一步引起火灾向隔壁区域蔓延,加大火灾的危险性。该文采用有限元法求解玻璃的一维热传导方程,并利用温差准则对三种典型热荷载作用下(热辐射、城乡交界域火灾和室内火灾)的玻璃首次破裂时间进行了预测研究。将模拟结果与前人的计算和实验结果比较,验证了模型的适用性和代码的可靠性。

     

    Abstract: Window glass breaks and even falls out in fire conditions when thermal stress induced by heating exceeds the critical breaking stress. The breakage of glass under fire conditions will cause further fire spreading to other regions, which increases the fire risk. In this paper, one-dimensional equation of heat conduction was solved using the finite element method, and the first breaking time of glass under three typical thermal loadings (thermal radiation, compartment fire, urban/wildland interface fire) was investigated by adopting criteria of temperature difference. The applicability of the model and reliability of the code were verified by comparing the numerical results with the experimental results and previous calculations.

     

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