燃气泄漏爆炸作用下地铁隧道动力响应分析
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摘要
城市燃气管线与地铁隧道多有交叉,燃气有泄漏爆炸风险并对地铁隧道造成一定影响,因此有必要对燃气泄漏爆炸对地铁隧道影响进行分析。由于燃气爆炸与炸药爆炸性质有所不同,为研究燃气泄漏爆炸对地铁隧道的影响,采用TNO多能法对燃气泄漏爆炸荷载进行计算,得出爆炸荷载强度及爆炸荷载作用范围,然后将爆炸冲击荷载作用于隧道上部土体表面一定范围内进而分析爆炸冲击荷载作用下地铁隧道的动力响应。建立地铁隧道的三维数值模型,并将所计算的爆炸冲击荷载施加于模型土体表面,采用显示分析方法进行计算。分析结果表明,燃气泄漏爆炸主要对地铁隧道的竖向变形产生影响,地铁隧道竖向最大位移随爆炸荷载强度、爆炸荷载作用时间增加而近线性增加,随隧道埋深增加而近线性减小。相对爆炸荷载强度及作用时间,隧道埋深对隧道最大竖向位移影响较小。
Some of the gas pipeline crosses with the subway tunnel in the city,and the gas has the risk of leaking and exploding. When the gas is leaking and exploding,the subway tunnel is affected. So it is necessary to analyze the effect of the gas leaking and exploding to the subway tunnel. Because of the difference of the explosion properties between the gas exploding and the explosive exploding,in order to study the explosive effect of the fuel gas leaking to the subway tunnel,the TNO Multi-energy method is used to calculated the explosive load of the fuel gas leaking,then the explosive impact load is acted on a certain range of the soil surface above the subway tunnel after the explosive load and region are obtained. Finally,the dynamic response of the subway tunnel under the explosive effect is analyzed. After getting the explosive load,the 3 D numerical model of the subway tunnel is built,then the explosive load is applied to the soil surface of the numerical model and the explicit computing method is carried out.The result shows that the main effect of the fuel gas exploding to the subway tunnel is the response of the vertical displacement. The max vertical displacement of the subway tunnel linearly increases when the explosive load and time increase,while the displacement linearly decreases when the buried depth increases. Relative to the explosive load and time,effect of the buried depth to the tunnel is lighter.
Some of the gas pipeline crosses with the subway tunnel in the city,and the gas has the risk of leaking and exploding. When the gas is leaking and exploding,the subway tunnel is affected. So it is necessary to analyze the effect of the gas leaking and exploding to the subway tunnel. Because of the difference of the explosion properties between the gas exploding and the explosive exploding,in order to study the explosive effect of the fuel gas leaking to the subway tunnel,the TNO Multi-energy method is used to calculated the explosive load of the fuel gas leaking,then the explosive impact load is acted on a certain range of the soil surface above the subway tunnel after the explosive load and region are obtained. Finally,the dynamic response of the subway tunnel under the explosive effect is analyzed. After getting the explosive load,the 3 D numerical model of the subway tunnel is built,then the explosive load is applied to the soil surface of the numerical model and the explicit computing method is carried out.The result shows that the main effect of the fuel gas exploding to the subway tunnel is the response of the vertical displacement. The max vertical displacement of the subway tunnel linearly increases when the explosive load and time increase,while the displacement linearly decreases when the buried depth increases. Relative to the explosive load and time,effect of the buried depth to the tunnel is lighter.
引文
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[14]孔德森,孟庆辉,张伟伟,等.爆炸荷载作用下地铁隧道的冲击反映研究[J].振动与冲击,2012,31(12):68-72.
[15]罗昆升,王勇,赵越堂,等.地铁区间隧道在地面爆炸荷载作用下的数值模拟[J].解放军理工大学学报(自然科学版),2007,8(6):674-679.
[16]吕东,张欣,吴伟,等.单面遮挡下受限甲烷气云爆炸超压模型研究[J].振动与冲击,2014,33(5):42-45.
[17]王新月,杨清真.热力学与气体动力学基础[M].西安:西北工业大学出版社,2004.
[18]赵文芳. TNO多能法在蒸汽云爆炸后果预测中的应用研究[J].安全、健康和环境,2014,14(10):15-18.
[19] Bosch C J H V D,Weterings R A P M. Methods for the calculation of physical effects(Yellow Book)[M]. The Hague:Committee for the Prevention of Disasters,2005.
[2]张秀华,张春巍,段忠东.爆炸荷载作用下钢框架柱冲击响应与破坏模式的数值模拟[J].沈阳建筑大学学报(自然科学版),2009,25(4):657-661.
[3] Chen J,Liew Y R. Explosion and fire analysis of steel frames using mixed element approach[J]. Journal of Engineering Mechanics,2005,131(6):606-616.
[4] Liew Y R,Chen H. Explosion and fire analysis of steel frames using fiber element approach[J]. Journal of Structure Engineering,2004,130(7):991-1000.
[5]廖祖伟,刘情杰,田志敏.钢板泡沫材料复合夹层板抗爆性能试验研究[J].地下空间与工程学报,2005,1(3):401-404,431.
[6]徐平,夏唐代.爆炸应力波引起地表位移的数值分析[J].地下空间与工程学报,2012,8(4):863-868.
[7]张楠,吉成,徐志洪.地下爆炸对混凝土路面毁伤效应的数值模拟[J].地下空间与工程学报,2013,9(增2):1868-1872.
[8]李忠献,刘杨,田力.单侧隧道内爆炸荷载作用下双线地铁隧道的动力响应与抗爆分析[J].北京工业大学学报,2006,32(2):173-181.
[9] Feldgun V R,Kochetkov A V,Karinski Y S,et al.Internal boast loading in a buried lined tunnel[J].Inernational Journal of Impact Engineering,2008,35(3):172-183.
[10] Tian L,Li Z. Dynamic response analysis of a subject to ground shock from a tunnel explosion[J]. International Journal of Impact Engineering, 2008, 35(10):1164-1178.
[11]刘干斌,郑荣跃,周晔.爆炸荷载作用下软土隧道动力响应数值模拟[J].宁波大学学报(理工版),2009,22(2):263-267.
[12]田志敏,邬玉斌,卫东,等.岩土中隧道抗偶然性内爆炸特性分析[J].地下空间与工程学报,2011,7(2):385-391,397.
[13]蔡袁强,陈成振,孙宏磊.爆炸荷载作用下饱和土中隧道的瞬态动力响应[J].岩土工程学报,2011,33(3):361-367.
[14]孔德森,孟庆辉,张伟伟,等.爆炸荷载作用下地铁隧道的冲击反映研究[J].振动与冲击,2012,31(12):68-72.
[15]罗昆升,王勇,赵越堂,等.地铁区间隧道在地面爆炸荷载作用下的数值模拟[J].解放军理工大学学报(自然科学版),2007,8(6):674-679.
[16]吕东,张欣,吴伟,等.单面遮挡下受限甲烷气云爆炸超压模型研究[J].振动与冲击,2014,33(5):42-45.
[17]王新月,杨清真.热力学与气体动力学基础[M].西安:西北工业大学出版社,2004.
[18]赵文芳. TNO多能法在蒸汽云爆炸后果预测中的应用研究[J].安全、健康和环境,2014,14(10):15-18.
[19] Bosch C J H V D,Weterings R A P M. Methods for the calculation of physical effects(Yellow Book)[M]. The Hague:Committee for the Prevention of Disasters,2005.
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