摘要
针对砌体住宅楼结构特点,以瓦房店市居民楼燃气闪爆事故为研究对象,利用FLACS软件三维建模爆炸楼层,考虑泄漏方向、门窗和隔板等影响,模拟气体的泄漏和爆炸,对比不同泄漏方向下天然气云团的扩散过程和不同时间下爆炸冲击压力的分布。结果表明,垂直向上和水平向屋内两个泄漏方向的不同,对天然气体积分数分布几乎无影响;门厅隔板阻碍扩散,天然气在厨房体积分数较高;爆炸初始,504室爆炸压力急剧升高,压力冲击波经门窗隔板以圆弧形式向外传递;400 s时刻比600 s爆炸压力小;600 s爆炸时刻的压力大于砖墙破坏压力76 kPa,结构发生破坏。研究成果为事故反演、受损结构稳定性评价和事故预防提供理论指导。
Aiming at the structural characteristics of masonry residential buildings,taking the gas flash explosion accident in residential buildings in Wafangdian city as the research object,FLACS software was used to model explosive floor in 3D.Gas leakage and explosion were simulated considering injection direction,doors,windows,partitions and other factors.Results showed that,horizontal and vertical leakage have almost no impact on the volume fraction distribution of natural gas,with kitchen volume fraction higher due to hall partition obstructing effect;Room 504 explosion pressure increased sharply at the beginning of explosion,transmitted outward through doors and windows in arc form.Explosion pressure at 400 s was lower than 600 s,with pressure at 600 s explosion greater than brick wall failure pressure of 76 kPa causing structure damage.Research results provide theoretical guidance for accident inversion,stability evaluation of damaged structures and accident prevention.
作者
王江楠
姚颖康
董思玲
刘尚校
Wang Jiangnan;Yao Yingkang;Dong Siling;Liu Shangxiao(State Key Laboratory of Precision Blasting,Jianghan University,Hubei Wuhan 430056,China;Hubei Fire and Rescue Brigade,Hubei Wuhan 430060,China)
出处
《消防科学与技术》
CAS
北大核心
2024年第3期334-339,共6页
Fire Science and Technology
基金
湖北省重点研发计划项目(2020BCA084)。
