文档介绍：沈阳航空工业学院硕士学位论文
摘要
随着我国经济建设的飞速发展和城市人口的不断增加,地下空间的开发正在进入一个飞速发展的新阶段。与此同时,地下空间的火灾危害性也在不断扩大。地下商业街作为一种地下建筑形式,在地下空间的开发利用中占有重要的地位。目前,对于地下商业街火灾风险的研究,多是基于处方式的评价或者采用软件模拟的形式,侧重于火灾单体评价,而对于地下商业街火灾事故发生过程中风险随时间变化,动态的火灾蔓延描述比较少。
本文根据地下商业街结构及其火灾特点,分析其火灾风险的特性。并根据地下商业街的火灾风险特性,考虑物质质量损失率和耐火极限,结合FTA分析,构造单体火灾风险函数。利用数学中的传染病模型,构造动态的火灾蔓延微分方程组,对地下商业街的火灾风险进行评价。在此基础上深化模型,得到火灾风险相关性矩阵,可对地下商业街的消防设施进行合理布局,最后通过实例计算来进一步验证方法的可行性。本文对地下商业街的布局设计和今后开展该方向的深入研究可提供一定参考。
关键词:地下商业街;单体火灾风险;传染病模型;动态火灾蔓延微分方程; 火灾风险相关性矩阵
Abstract
Wim the rapidly growth of the economic construction and the
increasing of population
size,the development of underground space is stepping into a new fire
risk in underground space is mercial street,as l(ind of
a
underjgrou芏ld architecture,plays an important role in the exploitation aIld utilization of
underground space·The current study about fire risk of mercial street is
mainly based on plied with specification,or focus on the fire dsk
single
assessment·But there is little description about fire risk in different time觚d dvll锄ic fire growth in a fire accident of an mercial s仃eet.
BaSed on the structure of mercial streets and
propenies of fires,thjs
s伽Y analyzed the characteristics of fire
to the fire risk charact嘶stics of
mercial bined with
FTA,a function model of single fire risk is
convinced,with consideration of the rate of mass loss and fire resistant dVn锄ic
fire spreading differential equation is listed from the
concept of印id锄ic model in
Matllematics·Thus,the fire risk of mercial s仃eets caIl be mis
basis,the 6re risk matrix of relativity is created after the deepen of that
a
reasonable 1ayout of fire protection facilities of underground coI啪ercial streets
caJl be
achieVed and the feasibility of this method is validated by
computing paper call
be a reference for the layout design of mercial s扫eets a11d龇er studies in
this field
Key w。rds:mercial Street;