洞口段隧道结构动力特性分析
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摘要
运用Newmark隐式时间积分有限元法,选用EI-Centro地震波,对洞口段隧道结构进行了二维地震响应数值模拟。得出了隧道结构的自振特性,地震波烈度和地震激励方向对隧道地震响应的影响规律:围岩性能越好,刚度越强,结构的自振频率越高;隧道结构在不同烈度地震中的响应是按地震波的最大加速度的比值增长。对研究洞口段隧道结构的抗震设计具有一定的参考价值。
In the light of the Newmark Step-by-Step Implicit Integration Method,and with the EI-Centro seismic waves adopted,a two-dimension seismic response numerical simulation is made of the portal section of the tunnel,which showed the influential laws of the vibration characteristics of the tunnel structure,the influence of the seismic waves and the excitation on the tunnel seismic response:the better the performance of the surrounding rock,the greater the rigidity of the tunnel,the higher the vibration frequency of the tunnel structure;the response of the tunnel structure to the intensity of the seismic waves varies with the ratio of the maximum acceleration of the seismic wave.The paper may serve as a useful reference for the seismic design of tunnel structures.
In the light of the Newmark Step-by-Step Implicit Integration Method,and with the EI-Centro seismic waves adopted,a two-dimension seismic response numerical simulation is made of the portal section of the tunnel,which showed the influential laws of the vibration characteristics of the tunnel structure,the influence of the seismic waves and the excitation on the tunnel seismic response:the better the performance of the surrounding rock,the greater the rigidity of the tunnel,the higher the vibration frequency of the tunnel structure;the response of the tunnel structure to the intensity of the seismic waves varies with the ratio of the maximum acceleration of the seismic wave.The paper may serve as a useful reference for the seismic design of tunnel structures.
引文
[1]潘昌实.隧道地震灾害综述[J].隧道及地下工程,1990,11(2):1-9
[2]潘昌实.隧道及地下结构物抗震问题的研究概述[J].世界隧道,1996,16(5):7-16
[3]SHARMA S,WILLIAN RJ,雷谦荣.地震对地下洞室的破坏[J].地下空间,1992,12(4):335-344
[4]高峰,关宝树.沉管隧道三维地震反应分析[J].兰州铁道学院学报,2003,22(1):39-43
[5]蔡佳骏,李之达,易辉,等.ANSYS二维弹塑性分析在联拱隧道围岩稳定性评价中的应用[J].水利与建筑工程学报,2005,3(1):10-14
[6]许增会,宋宏伟.地震对隧道围岩稳定性影响的数值模拟分析[J].中国矿业大学学报,2004,33(1):41-44
[7]高峰,李德武.隧道三维地震反应分析若干问题的研究[J].岩土工程学报,1998,20(4):48-53
[2]潘昌实.隧道及地下结构物抗震问题的研究概述[J].世界隧道,1996,16(5):7-16
[3]SHARMA S,WILLIAN RJ,雷谦荣.地震对地下洞室的破坏[J].地下空间,1992,12(4):335-344
[4]高峰,关宝树.沉管隧道三维地震反应分析[J].兰州铁道学院学报,2003,22(1):39-43
[5]蔡佳骏,李之达,易辉,等.ANSYS二维弹塑性分析在联拱隧道围岩稳定性评价中的应用[J].水利与建筑工程学报,2005,3(1):10-14
[6]许增会,宋宏伟.地震对隧道围岩稳定性影响的数值模拟分析[J].中国矿业大学学报,2004,33(1):41-44
[7]高峰,李德武.隧道三维地震反应分析若干问题的研究[J].岩土工程学报,1998,20(4):48-53
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