基于结构塌落的建筑火灾数值模拟方法
|
摘要
将流固耦合理论应用于建筑结构塌落的火灾数值计算中,建立基于结构塌落的火灾燃烧动力学模型,并将该模型嵌入火灾动力学系统FDS中,实现塌落物对火势影响的数值模拟。与原FDS进行数值模拟比对,验证该方法的可行性。将该方法应用于某居民建筑火灾案例中,进行基于结构塌落的建筑火灾数值模拟,结果表明塌落结构引起室内火灾发生轰燃现象,对室内温度、烟气浓度、CO2浓度变化产生重大影响。
The fluid-solid coupling theory is applied to the numerical calculation of fire in building structure collapse. The fire combustion dynamics model based on structural collapse is established.The model is embedded in the fire dynamics system FDS to realize the impact of the collapse on the fire. The numerical simulation is compared with the original FDS, and the feasibility of the method is verified. The method was applied to a residential building fire case, and the numerical simulation of building fire based on structural collapse was carried out. The results showed that the collapsed structure caused a flashover of indoor fire and had a significant impact on indoor temperature, smoke concentration and CO2 concentration change.
The fluid-solid coupling theory is applied to the numerical calculation of fire in building structure collapse. The fire combustion dynamics model based on structural collapse is established.The model is embedded in the fire dynamics system FDS to realize the impact of the collapse on the fire. The numerical simulation is compared with the original FDS, and the feasibility of the method is verified. The method was applied to a residential building fire case, and the numerical simulation of building fire based on structural collapse was carried out. The results showed that the collapsed structure caused a flashover of indoor fire and had a significant impact on indoor temperature, smoke concentration and CO2 concentration change.
引文
[1]李欢欢,朱国庆,陈少松,等.公路隧道中临界风速数值模拟研究[J].消防科学与技术,2011,30(3):198-201.
[2]江列霖,史超,杨培中.多场耦合的建筑火灾数值模拟研究及应用[J].消防科学与技术,2017,36(11):1504-1507.
[3]谢晓刚,胡忠日,唐胜利.建筑火灾实验中的回燃现象浅析[J].消防科学与技术,2007,26(4):380-382.
[4] LANGE D, ROBEN C, USMANI A. Tall building collapse mechanisms initiated by fire:Mechanisms and design methodology[J].Engineering Structures,2012,36:90-103.
[5] AGARWAL A, H VARMA A. Fire induced progressive collapse of steel building structures:The role of interior gravity columns[J]. Engineering Structures,2014,58:129-140.
[6]姜棚,邱榕,蒋勇,基于数值模拟的某大厦特大火灾过程调查[J].燃烧科学与技术,2007,13(1):76-80.
[7]陆洲导,柴继锋,余江滔.火灾后钢筋混凝土连续梁力学性能的计算分析[J].同济大学学报(自然科学版),2015,43(1):16-26.
[8]李树豪,刘建文,李瑞,等.碳氢燃料燃烧机理的自动简化[J].高等学校化学学报,2015,36(8):1576-1587.
[9]王立华.空气阻力对自由落体运动的影响[J].沧州师范专科学校学报,2000,(2):50-52.
[10]夏卿,钱仰德.空气阻力系数测试仪[J].物理实验,2016,36(8):16-20.
[11]张阿漫,戴绍仕.流固耦合动力学[M].北京:国防工业出版社,2011.
[12] MC GRATTAN K, M CDERMOTT R, HOSTIKKA S, et al.Fire dynamics simulator(Version 6)user's guide[M]. New York:National Institute of Standards and Technology Special Publication, 2014.
[13]陈德户,杨培中,李超.基于沉积理论的碳黑痕迹数值方法[J].上海交通大学学报,2013,47(6):989-993.
[2]江列霖,史超,杨培中.多场耦合的建筑火灾数值模拟研究及应用[J].消防科学与技术,2017,36(11):1504-1507.
[3]谢晓刚,胡忠日,唐胜利.建筑火灾实验中的回燃现象浅析[J].消防科学与技术,2007,26(4):380-382.
[4] LANGE D, ROBEN C, USMANI A. Tall building collapse mechanisms initiated by fire:Mechanisms and design methodology[J].Engineering Structures,2012,36:90-103.
[5] AGARWAL A, H VARMA A. Fire induced progressive collapse of steel building structures:The role of interior gravity columns[J]. Engineering Structures,2014,58:129-140.
[6]姜棚,邱榕,蒋勇,基于数值模拟的某大厦特大火灾过程调查[J].燃烧科学与技术,2007,13(1):76-80.
[7]陆洲导,柴继锋,余江滔.火灾后钢筋混凝土连续梁力学性能的计算分析[J].同济大学学报(自然科学版),2015,43(1):16-26.
[8]李树豪,刘建文,李瑞,等.碳氢燃料燃烧机理的自动简化[J].高等学校化学学报,2015,36(8):1576-1587.
[9]王立华.空气阻力对自由落体运动的影响[J].沧州师范专科学校学报,2000,(2):50-52.
[10]夏卿,钱仰德.空气阻力系数测试仪[J].物理实验,2016,36(8):16-20.
[11]张阿漫,戴绍仕.流固耦合动力学[M].北京:国防工业出版社,2011.
[12] MC GRATTAN K, M CDERMOTT R, HOSTIKKA S, et al.Fire dynamics simulator(Version 6)user's guide[M]. New York:National Institute of Standards and Technology Special Publication, 2014.
[13]陈德户,杨培中,李超.基于沉积理论的碳黑痕迹数值方法[J].上海交通大学学报,2013,47(6):989-993.