200km·h~(-1)列车脱轨撞击作用下盾构隧道二次衬砌对管片衬砌的防护效果
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摘要
建立列车撞击刚性墙三维数值模型,模拟8辆编组的列车以200km·h-1的速度斜向12.5°脱轨撞击刚性墙,获得近似的列车撞击荷载时程曲线。建立列车脱轨撞击隧道衬砌的三维数值模型,对比分析在列车撞击荷载作用下双层衬砌和单层管片衬砌2种盾构隧道衬砌结构型式下管片衬砌的应力、速度、加速度以及损伤因子和损伤面积,揭示盾构隧道二次衬砌对管片衬砌的防护效果。结果表明:撞击力时程曲线呈双峰值;管片衬砌的受拉损伤显著大于受压损伤;二次衬砌对管片衬砌的速度和加速度的消减效果分别为20%~27%和约20%;二次衬砌对管片衬砌的防护效果主要为限制管片衬砌损伤面积的扩大,而对平均损伤强度的消减效果并不明显。
A three-dimensional numerical analysis model of the rigid wall was established to obtain the approximate time-history curve of the impact load by an eight-car formation train which hit the rigid wall upon derailment with the speed of 200km·h-1 and at an angle of 12.5degrees.By constructing the threedimensional numerical analysis model of train derailment impact on tunnel lining,the stress,velocity,acceleration,damage factor and damaged area of both the single-layered segment lining and double-layered lining for shield tunnel under train impact load were compared and analyzed.The protective effect of the secondary lining of shield tunnel on segment lining was revealed.The results show that the time-history curve of the impact force has double peaks.The tensile damage of segment lining is significantly greater than the compressive damage.The reduction effect of secondary lining for the velocity and acceleration of segment lining is 20% ~27% and about 20% respectively.The protective effect of secondary lining on segment lining mainly lies in limiting the expansion of damaged area,but the reduction effect on the average damage strength is not obvious.
A three-dimensional numerical analysis model of the rigid wall was established to obtain the approximate time-history curve of the impact load by an eight-car formation train which hit the rigid wall upon derailment with the speed of 200km·h-1 and at an angle of 12.5degrees.By constructing the threedimensional numerical analysis model of train derailment impact on tunnel lining,the stress,velocity,acceleration,damage factor and damaged area of both the single-layered segment lining and double-layered lining for shield tunnel under train impact load were compared and analyzed.The protective effect of the secondary lining of shield tunnel on segment lining was revealed.The results show that the time-history curve of the impact force has double peaks.The tensile damage of segment lining is significantly greater than the compressive damage.The reduction effect of secondary lining for the velocity and acceleration of segment lining is 20% ~27% and about 20% respectively.The protective effect of secondary lining on segment lining mainly lies in limiting the expansion of damaged area,but the reduction effect on the average damage strength is not obvious.
引文
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[14]王娜娜,马卫华.自动车钩的弹簧刚度和阻尼系数对列车纵向动力学的影响[J].内燃机车,2010(9):1-3.(WANG Nana,MA Weihua.Influence of Spring Stiffness and Damping Coefficient of Automatic Coupler on the Longitudinal Dynamics of Train[J].Diesel Locomotives,2010(9):1-3.in Chinese)
[2]NASRI A Wunfah,VMICHAEL P Delia Posta.Full Scale Testing of Tunnel Liner[C]//HERRNAN L R.Towards New Worlds in Tunnelling.Rotterdam:Balkema,1992:315-320.
[3]村上博智,小泉淳.二次覆工で補強されたシールドセグメントリングの挙動について[J].土木学会论文集,1987(388):85-94.(MURAKAMI Hirotomo,KOIZUMI Atsuhi.Behavior of Shield Segment Ring Reinforced by Secondary Lining[J].Journal of Japan Society of Civil Engineers,1987(388):85-94.in Japanese)
[4]张厚美,过迟,吕国梁,等.盾构压力隧洞双层衬砌的力学模型研究[J].水利学报,2001(4):28-33.(ZHANG Houmei,GUO Chi,LGuoliang,et al.Mechanical Model for Shield Pressure Tunnel with Secondary Linings[J].Journal of Hydraulic Engineering,2001(4):28-33.in Chinese)
[5]何川,郭瑞,肖明清,等.铁路盾构隧道单、双层衬砌纵向力学性能的模型试验研究[J].中国铁道科学,2013,34(3):40-46.(HE Chuan,GUO Rui,XIAO Mingqing,et al.Model Test on Longitudinal Mechanical Properties of Single and Double Layered Linings for Railway Shield Tunnel[J].China Railway Science,2013,34(3):40-46.in Chinese)
[6]晏启祥,程曦,何川,等.水压条件下盾构隧道双层衬砌力学特性分析[J].铁道工程学报,2010(9):55-59.(YAN Qixiang,CHENG Xi,HE Chuan,et al.Analysis of Mechanical Properties of Double-Layered Lining of Shield Tunnel under Water Pressure[J].Journal of Railway Engineering Society,2010(9):55-59.in Chinese)
[7]姚松,田红旗.车辆吸能部件的薄壁结构碰撞研究[J].中国铁道科学,2001,22(2):55-60.(YAO Song,TIAN Hongqi.Crash Research on Thin-Shelled Structure as Vehicle Energy-Absorbing Components[J].China Railway Science,2001,22(2):55-60.in Chinese)
[8]高广军,田红旗,姚松,等.列车多体耦合撞击分析[J].中国铁道科学,2005,26(4):93-97.(GAO Guangjun,TIAN Hongqi,YAO Song,et al.Multi-Car Coupling Collision Analysis[J].China Railway Science,2005,26(4):93-97.in Chinese)
[9]刘金朝,房加志,王成国,等.铁道客车大变形碰撞仿真研究[J].中国铁道科学,2004,25(6):1-8.(LIU Jinzhao,FANG Jiazhi,WANG Chenguo,et al.Simulation Research on Finite Deformation Crashworthiness of Railway Passenger Car[J].China Railway Science,2004,25(6):1-8.in Chinese)
[10]房加志,刘金朝,焦群英,等.铁路客车结构大变形碰撞特性的仿真研究[J].中国农业大学学报,2004,9(4):76-78.(FANG Jiazhi,LIU Jinzhao,JIAO Qunying,et al.Simulation of Collision Characteristics of Train Vehicle with Large Deformation[J].Journal of China Agricultural University,2004,9(4):76-78.in Chinese)
[11]ZINEDDIN N,KRAUTHAMMER T.Dynamic Response and Behavior of Reinforced Concrete Slabs under Impact Loading[J].International Journal of Impact Engineering,2007,34:1517-1534.
[12]李丽.基于ABAQUS的高速公路隧道地震动力响应研究[D].成都:西南交通大学,2009.(LI Li.Study on Seismic Dynamic Response of Expressway Tunnel Based on ABAQUS[D].Chengdu:Southwest Jiaotong University,2009.in Chinese)
[13]中华人民共和国建设部.GB 50010—2002混凝土结构设计规范[S].北京:中国建筑工业出版社,2002.(Ministry of Construction of the Peoples Republic of China.GB 50010—2002Code for Design of Concrete Structures[D].Beijing:China Architecture&Building Press,2002.in Chinese)
[14]王娜娜,马卫华.自动车钩的弹簧刚度和阻尼系数对列车纵向动力学的影响[J].内燃机车,2010(9):1-3.(WANG Nana,MA Weihua.Influence of Spring Stiffness and Damping Coefficient of Automatic Coupler on the Longitudinal Dynamics of Train[J].Diesel Locomotives,2010(9):1-3.in Chinese)
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