重载列车运行与地震力耦合作用下交叉隧道动力响应分析
|
摘要
在地震频发区域修建的交叉隧道,重载列车运行时若遇地震力作用,其隧道结构的动力响应备受关注.论文建立了正交交叉隧道的三维有限差分模型,用激振函数模拟重载列车竖向振动荷载,并输入地震波,以研究重载列车运行与地震力耦合作用下隧道结构的动力响应规律.结果表明:在重载列车振动荷载作用下,上跨隧道振动加速度由大到小依次为隧底、拱脚、拱顶和拱腰,下穿隧道振动加速度由大到小依次为拱顶、拱腰、拱脚和隧底;在重载列车运行与地震力耦合作用下,上跨隧道振动加速度由大到小依次为隧底、拱顶、拱脚和拱腰,下穿隧道振动加速度由大到小依次为拱顶、拱腰、拱脚和隧底;重载列车运行与地震力耦合作用下相比仅受重载列车运行条件作用时,交叉隧道结构动力响应相对更为显著.
In the crossing tunnels built in the areas of frequent earthquakes,the dynamic response of the tunnel structure of the heavy-haul train under the action of earthquake force has attracted much attention.In this paper,a three-dimensional finite difference model of orthogonal crossing tunnel is established.The vertical vibration load of heavy-haul train is simulated by using excitation function,and the earthquake wave is input,so as to study the dynamic response law of tunnel structure under the coupling action of heavy-haul train operation and earthquake force.The results show thatunder the action of heavy-haul train vibration load,the vibration acceleration of the upper span tunnel is ranked from the tunnel bottom,arch foot,arch roof to tunnel waist,in order from large to small;the vibration acceleration of the lower span tunnel is ranked from the tunnel bottom,arch waist,arch foot to tunnel bottom,in order from large to small.Under the coupling effect of heavyhaul train operation and earthquake force,the vibration acceleration of the upper span tunnel is ranked from the tunnel bottom,arch top,arch foot to tunnel bottom in order from large to small,and the vibration acceleration of the lower span tunnel is ranked from the arch top,arch waist,arch foot to tunnel bottom in order from large to small.The dynamic response of the crossing tunnel structure is more remarkable under the coupling action of heavy-haul train operation and earthquake force than under the operation condition of heavy-haul train only.
In the crossing tunnels built in the areas of frequent earthquakes,the dynamic response of the tunnel structure of the heavy-haul train under the action of earthquake force has attracted much attention.In this paper,a three-dimensional finite difference model of orthogonal crossing tunnel is established.The vertical vibration load of heavy-haul train is simulated by using excitation function,and the earthquake wave is input,so as to study the dynamic response law of tunnel structure under the coupling action of heavy-haul train operation and earthquake force.The results show thatunder the action of heavy-haul train vibration load,the vibration acceleration of the upper span tunnel is ranked from the tunnel bottom,arch foot,arch roof to tunnel waist,in order from large to small;the vibration acceleration of the lower span tunnel is ranked from the tunnel bottom,arch waist,arch foot to tunnel bottom,in order from large to small.Under the coupling effect of heavyhaul train operation and earthquake force,the vibration acceleration of the upper span tunnel is ranked from the tunnel bottom,arch top,arch foot to tunnel bottom in order from large to small,and the vibration acceleration of the lower span tunnel is ranked from the arch top,arch waist,arch foot to tunnel bottom in order from large to small.The dynamic response of the crossing tunnel structure is more remarkable under the coupling action of heavy-haul train operation and earthquake force than under the operation condition of heavy-haul train only.
引文
[1]胡亚东.我国铁路重载运输技术体系的现状与发展[J].中国铁道科学,2015,36(2):1~10
[2]彭立敏,覃长炳,施成华,等.铁路隧道基底病害整治现场试验研究[J].中国铁道科学,2005,26(2):39~43
[3]王祥秋,杨林德,周治国.列车振动荷载作用下隧道衬砌结构动力响应特性分析[J].岩石力学与工程学报,2006,25(7):1337~1337
[4]王翠艳.重载列车作用下交叠隧道动力响应分析[J].石家庄铁道大学学报(自然科学版),2015,28(2):21~26
[5]安军海,陶连金,李积栋,等.地铁双层交叉隧道非线性地震响应分析[J].中国铁道科学,2015,36(3):66~72
[6]朱正国,杨利海,刘桂朋,等.地震对交叉隧道影响机制及抗震方案研究[J].铁道工程学报,2018,35(9):61~66
[7]苟明中.列车振动对盾构重叠隧道的影响探讨[J].铁道工程学报,2013,30(3):66~70
[8]冯军和.列车随机激振荷载的数值模拟[J].振动与冲击,2008,27(2):49~52
[2]彭立敏,覃长炳,施成华,等.铁路隧道基底病害整治现场试验研究[J].中国铁道科学,2005,26(2):39~43
[3]王祥秋,杨林德,周治国.列车振动荷载作用下隧道衬砌结构动力响应特性分析[J].岩石力学与工程学报,2006,25(7):1337~1337
[4]王翠艳.重载列车作用下交叠隧道动力响应分析[J].石家庄铁道大学学报(自然科学版),2015,28(2):21~26
[5]安军海,陶连金,李积栋,等.地铁双层交叉隧道非线性地震响应分析[J].中国铁道科学,2015,36(3):66~72
[6]朱正国,杨利海,刘桂朋,等.地震对交叉隧道影响机制及抗震方案研究[J].铁道工程学报,2018,35(9):61~66
[7]苟明中.列车振动对盾构重叠隧道的影响探讨[J].铁道工程学报,2013,30(3):66~70
[8]冯军和.列车随机激振荷载的数值模拟[J].振动与冲击,2008,27(2):49~52