Prediction of critical value of fire flashover in stilted buildings with timber structure

doi:10.16265/j.cnki.issn1003-3033.2020.02.006

Abstract

Abstract: In order to explore critical phenomenon of flashover during fire development process in restricted space of wooden stilted buildings, with a typical wooden stilted building in Guizhou province taken as an object, critical value of flashover was quantitatively analyzed by using mutation theory and numerical simulation software. The results show that flashover phenomenon of stilted buildings with timber structure features Swallowtail Catastrophe, and the critical temperature calculated by it is 951.5 K while that calculated by numerical simulation is 953.4 K, which is comparatively consistent with the former. It is also found that occurrence of flashover in confined space has little relation with external wind speed.

Key words: stilted buildings with timber structure, flashover, critical value forecasting, catastrophe theory, numerical simulation

CLC Number:

X932

WEI Shanyang, SHI Mei, YANG Huan, SUN Wei. Prediction of critical value of fire flashover in stilted buildings with timber structure[J]. China Safety Science Journal, 2020, 30(2): 35-40.

References 23

[1]	安茹. 西江千户苗寨民居建筑特色及生态意义研究[D]. 新乡: 河南师范大学, 2014.AN Ru. Xijiang Miao Village residential building characteristics and ecological significance[D]. Xinxiang: Henan Normal University, 2014.
[2]	CHENG Caixia, SUN Fuchun, ZHOU Xinquan. One fire detection method using neural networks[J]. Tsinghua Science and Technology, 2011, 16(1):31-35.
[3]	陈娟娟, 方正, 谢涛,等. 典型建筑火灾风险评估体系及其软件开发[J]. 中国安全科学学报, 2015, 25(1):116-121.CHEN Juanjuan, FANG Zheng, XIE Tao, et al. Fire risk assessment for typical buildings and software development[J]. China Safety Science Journal, 2015, 25(1):116-121.
[4]	朱毅, 李思成. 耦合因素对高层建筑疏散走廊排烟效果的影响[J]. 中国安全科学学报, 2019, 29(2):76-81.ZHU Yi, LI Sicheng. Smoke exhausting efficiency from corridor of high-rise building vs coupled factors[J]. China Safety Science Journal, 2019, 29(2):76-81.
[5]	王雁楠, 邱洪兴. 基于FDS的古建群落火灾蔓延规律数值分析[J]. 中国安全科学学报, 2014, 24(6):26-32.WANG Yannan, QIU Hongxing. Numerical analysis of spreading law of ancient timber building group fire based on FDS[J]. China Safety Science Journal, 2014, 24(6):26-32.
[6]	GAO Nan, WENG Wenguo, MA Wei, et al. Fire spread model for old towns based on cellular automaton[J]. Tsinghua Science and Technology, 2008, 13(5):736-740.
[7]	郭福良. 木结构吊脚楼建筑群火灾蔓延特性研究[D]. 北京: 中国矿业大学(北京), 2013.GUO Fuliang. Study on characteristics of fire spread of houses on stilts[D]. Beijing: China University of Mining & Technology(Beijing), 2013.
[8]	曾翔, 杨哲飚, 许镇, 等. 村镇建筑群火灾蔓延模拟与案例[J]. 清华大学学报: 自然科学版, 2017, 57(12):1 331-1 337.ZENG Xiang, YANG Zhebiao, XU Zhen, et al. Fire spread simulations of building groups in rural areas[J]. Journal of Tsinghua University: Science and Technology, 2017, 57(12):1 331-1 337.
[9]	李兆男. 木结构古建筑轰燃影响因素的研究[D]. 成都: 西华大学, 2017.LI Zhaonan. Study on the factors influencing the flashover of ancient wood structure building[D]. Chengdu: Xihua University, 2017.
[10]	陈爱平, 乔纳森·弗朗西斯. 室内轰燃预测方法研究[J]. 爆炸与冲击, 2003, 23 (4):368-374.CHEN Aiping, FRANCIS J. Studies on predicting flashover in enclosures[J]. Explosion and Shock Waves, 2003, 23(4):368-374.
[11]	谢之康. 火灾现象与非线性(Ⅱ):突变火灾学[J]. 中国矿业大学学报, 2000, 29(5):3-6.XIE Zhikang. Fire phenomena and nonlinearity (Ⅱ):catastrophic fire dynamics[J]. Journal of China University of Mining & Technology, 2000, 29(5):3-6.
[12]	翁文国, 范维澄. 突变理论应用于腔室火灾中的回燃现象[J]. 数学物理学报, 2002,22 (4):564-570.WENG Wenguo, FAN Weicheng. Study on catastrophe behavior of backdraft in building fires[J]. Acta Mathematica Scientia, 2002, 22 (4):564-570.
[13]	翁文国, 范维澄. 建筑火灾中轰燃现象的突变动力学研究[J]. 自然科学进展, 2003, 13(7):55-59.WENG Wenguo, FAN Weicheng. Study on flashover in building fires by catastrophe dynamics[J]. Progress in Natural Science, 2003, 13 (7):55-59.
[14]	楼波, 陈昌明, 张小英. 突变理论在火灾轰燃的应用分析[J]. 电力科学与技术学报, 2007, 22 (4):45-49.LOU Bo, CHEN Changming, ZHANG Xiaoying. Application analysis of catastrophe theory in the filed of fire disaster[J]. Journal of Electric Power Science and Technology, 2007, 22 (4):45-49.
[15]	杨祎, 赵平. 在建建筑火灾轰燃数值仿真研究[J]. 土木与环境工程学报, 2019, 41(2):159-166.YANG Yi, ZHAO Ping. Numerical simulation of fire flashover in building under construction[J]. Journal of Civil and Environmental Engineering, 2019, 41(2):159-166.
[16]	吴松林, 杜扬. 基于突变理论的国内外火灾科学研究进展和展望[J]. 火灾科学, 2013, 22(2):59-64.WU Songlin, DU Yang. Progress and prospect of fire science based on catastrophe theory[J]. Fire Safety Science, 2013, 22(2):59-64.
[17]	王晶晶, 吴国强, 廖艳芬, 等. 基于突变论的地铁车厢火灾中轰燃条件分析[J]. 燃烧科学与技术, 2006, 12(3):269-273.WANG Jingjing, WU Guoqiang, LIAO Yanfen, et al. Flashover in subway fire based on catastrophe theory[J]. Journal of Combustion Science and Technology, 2006, 12(3):269-273.
[18]	杨景标, 马晓茜. 基于突变论的林火蔓延分析[J]. 工程热物理学报, 2003, 24(1):169-172.YANG Jingbiao, MA Xiaoxi. Study on the forest fire spread based on catastrophe theory[J]. Journal of Engineering Thermophysics, 2003, 24(1):169-172.
[19]	凌复华. 突变理论及其应用[M]. 上海: 上海交通大学出版社, 1987:103-105.
[20]	吴巍. 黔东南苗族传统建筑文化的当代设计表达研究[D]. 广州: 华南理工大学, 2018.WU Wei. The research on the contemporary design of architectural culture of Miao in southeast Guizhou[D]. Guangzhou: South China University of Technology, 2018.
[21]	杨祎. 在建高层建筑火灾轰燃与烟囱效应数值模拟研究[D]. 西安: 西安建筑科技大学, 2018.YANG Yi. Research on the fire analysis and numerical simulation in high-rise building under construction[D]. Xi'an: Xi'an University of Architecture and Technology, 2018.
[22]	HAGGLUND B, JANNSON R, ONNERMARK B. Fire development in residential rooms after ignition from nuclear explosions[R].FOA Rapport C 2016-D6(A3), Forsvarets Forskingsanstalt Huyuoemhet 2, 1974.
[23]	宋虎. 小尺寸腔室轰燃现象的实验和理论研究[D]. 合肥: 中国科学技术大学, 2002.SONG Hu. Study on the small-scale apparatus experiment and theoretic of flashover in building fires[D]. Hefei: University of Science and Technology of China, 2002.