地震作用下大型地下洞室群应力传播特征研究
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摘要
选用攀枝花-会理地震波,通过基线校正和高频滤波,作为实际地震动输入,利用FLAC3D软件对某水电站大型地下洞室群进行了地震作用下应力传播特性的研究。数值分析结果表明,洞室群周围应力时程的变化趋势与输入加速度时程的变化趋势相似,但由于地震波的传播需要一定的时间,因此存在一定的滞后效应。洞室边墙出现了一定面积的拉应力区,随着输入加速度的增大,拉应力区的范围有所扩展,但是扩展的范围不大。所得结果对大型地下洞室群地震动传播特征问题的研究具有一定的参考意义。
One of the Panzhihua-Huili earthquake records,by baseline correction and high frequency filter,was selected as the actual seismic input for numerical simulation of horizontal seismic acceleration propagation in large underground cavern group of some hydraulic power station by software FLAC3D.The results show that the stress around caverns vary similarly with input acceleration.The tension zone area around caverns increases with acceleration to some extent.This research results can give a reference to the study on the seismic wave propagation in large underground cavern group.
One of the Panzhihua-Huili earthquake records,by baseline correction and high frequency filter,was selected as the actual seismic input for numerical simulation of horizontal seismic acceleration propagation in large underground cavern group of some hydraulic power station by software FLAC3D.The results show that the stress around caverns vary similarly with input acceleration.The tension zone area around caverns increases with acceleration to some extent.This research results can give a reference to the study on the seismic wave propagation in large underground cavern group.
引文
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[10]胡聿贤.地震工程学[M].北京:地震出版社,2006.HU Yuxian.Earthquake engineering[M].Beijing:Earthquake Press,2006.
[2]W.L.Wang,T.T.Wang,J.J.Su.Assessment of damage in mountain tunnels due to the Taiwan Chii-Chi earthquake[J].Tunnelling and un-derground space technology.2001(16):133-150.
[3]Wang Zhengzheng,Gaobo.Investigation and assessment on mountain tunnels and geotechnical damage after the Wenchuan earthquake[J].Sci-ence in China Series E:Technogilcal Science,2009,52(2):546-558.
[4]左双英,肖明.映秀湾水电站大型地下洞室群三维非线性损伤地震响应数值分析[J].水力发电学报,2009,28(5):127～133.ZUO Shuangying,XIAO Ming.3D numerical analysis on nonlinear damage seismic response of large underground caverns of Yingxiuwan hydropow-er station[J].Journal of Hydroelectric Engineering,2009,28(5):127-133.
[5]宋林,孟昭博,吴敏哲,等.双层岛式地铁车站结构地震反应分析[J].世界地震工程,2010,26(2):187-192.Song Lin,Meng Bozhao,Wu Minzhe,et al.Dynamic response analysis of a two layer subway station structure under earthquake[J].World Earth-quake Engineering,2010,26(2):187-192.
[6]边金,陶连金,王文沛,等.强震下地铁车站结构动力响应特性[J].世界地震工程,2010,26(2):114-118.Bian Jin,Tao Lianjin,Wang Wenpei,et al.Dynamic response characteristics of underground subway station during the strong earthquake[J].World Earthquake Engineering,2010,26(2):114-118.
[7]李海波,马行东,李俊如,等.地震荷载作用下地下岩体洞室位移特征的影响因素分析[J].岩土工程学报,2006,28(3):358～362.LI Haibo,MA Xingdong,LI Junru,et al.Study on influence factors of rock cavern displacement under earthquake[J].Chinese Journal ofGeotechnical Engineering,2006,28(3):358～362.
[8]王如宾,徐卫亚,石崇,等.高地震烈度区岩体地下洞室动力响应分析[J].岩石力学与工程学报,2009,28(3):568-575.WANG Rubin,XU Weiya,SHI Chong,et al.Dynamic response analysis of rock underground caverns in highly seismic region[J].Chinese Jour-nal of Rock Mechanics and Engineering,2009,28(3):568-575.
[9]李小军,卢滔.水电站地下厂房洞室群地震反应显式有限元分析[J].水力发电学报,2009,28(5):1877-1882.LI Xiaojun,LU Tao.Explicit finite element analysis of earthquake response for underground caverns of hydropower stations[J].Journal of Hydroe-lectric Engineering,2009,28(5):1877-1882.
[10]胡聿贤.地震工程学[M].北京:地震出版社,2006.HU Yuxian.Earthquake engineering[M].Beijing:Earthquake Press,2006.
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