L形建筑EPS外保温系统火灾发展模拟

发布时间：2018-01-09 06:15

本文关键词：L形建筑EPS外保温系统火灾发展模拟　出处：《消防科学与技术》2015年10期 　论文类型：期刊论文

【摘要】：为深入分析L形建筑有机外保温系统火灾危险性,预防和扑救L形建筑外保温系统火灾,利用有机保温材料燃烧和热解特性进行全尺寸火灾大涡模拟。以EPS为例测得样品的燃烧热值和热重-差热分析下的热解特性。基于实验数据,利用FDS建立全尺寸火灾模型,对墙面火和墙角火进行危险性分析。结果表明:以EPS为例的L形建筑有机外保温系统火灾主要分为竖向加速蔓延和整体水平蔓延两个阶段,分别随时间呈指数和线性增长关系;墙角火竖向蔓延更快,建筑内危险来临时间较早,火灾初期危险性更大;火灾中后期,墙面火场景下因火焰热流反馈而导致突然全面燃烧,使火灾损失和救援难度大大增加。
[Abstract]:In order to analyze the fire risk of the organic external insulation system of L-shaped building, to prevent and extinguish the fire of the outer insulation system of L-shaped building. The combustion and pyrolysis characteristics of organic thermal insulation materials were used to simulate the full-scale large eddy fire. The combustion calorific value of the sample and the pyrolysis characteristics under thermogravimetric differential thermal analysis were measured by taking EPS as an example. The experimental data were based on the experimental data. The full-scale fire model was established by FDS. The hazard analysis of wall fire and corner fire is carried out. The results show that the fire of L-shaped building external insulation system based on EPS is divided into two stages: vertical accelerated spread and overall horizontal spread. The relationship between exponential and linear increases with time; The vertical spread of fire in the corner of the wall is faster, the danger in the building comes earlier, and the initial danger of the fire is greater; In the middle and late stage of the fire, the fire loss and rescue difficulty are greatly increased because of the fire heat flow feedback under the wall fire scene.
【作者单位】：中国矿业大学安全工程学院;中国矿业大学煤矿瓦斯与火灾防治教育部重点实验室;中国矿业大学消防工程研究所;
【基金】：江苏省自然科学基金项目(BK20131117) 江苏高校优势学科建设工程资助项目(PAPD)~~
【分类号】：TU761.12;TU998.1
【正文快照】： 由于建筑节能工程的需要,有机保温板材以其优越的保温性能应用广泛。然而受材料的可燃性、防火措施不当等诸多因素的影响,有机保温材料引发的火灾事故时有发生,此类火灾危险性也日益得到人们的重视。随着建筑形式的多样化,不同建筑形式的保温材料外立面火灾危险性也不尽相同。

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