高山峡谷地区洞室群工程区域地下地震动参数研究
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摘要
地下地震动参数研究是洞室群等地下工程进行抗震设防的关键性基础。通常的地下地震动参数研究针对的是常规场地,而对水电站地下洞室群所特有的高山峡谷工程区域缺乏针对性考虑。以金沙江白鹤滩水电站右岸地下洞室群作为工程实例,从幅值、持时及频谱三大参数角度,对高山峡谷地区洞室群工程区域地震动沿埋深的变化规律进行了研究,并探讨了考虑不同地震动参数的差异。层间错动带及洞室空腔对地震波幅值具有一定程度的减小作用,对频谱特征有近似"低通滤波"的特性,对持时显示出较明显的增加作用,但其机理有待深入研究。高山峡谷地形对地震动幅值和频谱参数的影响较大,对持时参数的影响较小。结果表明,对于高山峡谷地形中的洞室工程,不宜直接搬用常规场地的地震动参数成果。研究成果对西部地区水电站地下厂房洞室群的抗震设计具有一定的参考作用。
Ground motion parameter study is a basis for seismic design of underground houses,yet regular sub-ground motions parameter study may ignore the unique alpine gorge topography effect.In this paper,the sub-ground motions parameters for Baihetan underground house is studied from the point of view of amplitude,duration,and spectrum.Differences between various ground motion parameters are discussed.The fault zones possess suppressing effect on amplitude parameters,low-pass filtering effect on spectrum parameters,and enlarging effect on duration parameters,for which further study is required.Influence of alpine gorge topography is significant on amplitude and spectrum,yet negligible on duration.It is suggested that without specialized study,results from regular sub-ground motions parameter study may not be suitable for underground houses in alpine gorge area.
Ground motion parameter study is a basis for seismic design of underground houses,yet regular sub-ground motions parameter study may ignore the unique alpine gorge topography effect.In this paper,the sub-ground motions parameters for Baihetan underground house is studied from the point of view of amplitude,duration,and spectrum.Differences between various ground motion parameters are discussed.The fault zones possess suppressing effect on amplitude parameters,low-pass filtering effect on spectrum parameters,and enlarging effect on duration parameters,for which further study is required.Influence of alpine gorge topography is significant on amplitude and spectrum,yet negligible on duration.It is suggested that without specialized study,results from regular sub-ground motions parameter study may not be suitable for underground houses in alpine gorge area.
引文
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[13]李英民,王丽萍,赵耀.坡地地形对竖向地震动反应谱特性的影响分析[J].地震工程与工程振动,2010,30(5):156-161.Li Y M,Wang L P,Zhao Y.Influence of slope terrainon characteristics of vertical ground motion responsespectra[J].Journal of Earthquake Engineering andEngineering Vibration,2010,30(5):156-161.
[14]荣棉水,李小军.局部地形对出平面运动谱特性的影响分析[J].中国地震,2007,23(2):147-156.Rong M Sh,Li X J.The effect analysis of topographyon the spectrum property of anti-plane movement[J].Earthquake Research in China,2007,23(2):147-156.
[15]崔臻,盛谦,刘加进,等.基于小波包的地下洞室群地震响应及其频谱特性研究[J].岩土力学,2010,31(12):3525-3530.Cui Zh,Sheng Q,Liu J J,et al.Spectrum characte-ristics analysis of seismic response for undergroundhouses via wavelet packet[J].Rock and Soil Mecha-nics,2010,31(12):3525-3530.
[16]盛谦,崔臻,刘加进,等.传递函数在地下工程地震响应研究中的应用[J].岩土力学,2012,33(8):2253-2258.Sheng Q,Cui Zh,Liu J J,et al.Application study oftransfer function for seismic response analysis of un-derground engineering[J].Rock and Soil Mechanics,2012,33(8):2253-2258.
[2]徐龙军,谢礼立,胡进军.地下地震动工程特性分析[J].岩土工程学报,2006,28(9):1106-1111.Xu L J,Xie L L,Hu J J.Analysis on engineeringcharacteristics of sub-ground motions[J].ChineseJournal of Geotechnical Engineering,2006,28(9):1106-1111.
[3]胡进军.地下地震动参数研究[D].哈尔滨:中国地震局工程力学研究所,2003.Hu J J.Study on variation of the earthquake groundand sub-ground motion[D].Harbin:Institute of Engi-neering Mechanics of China Earthquake Administra-tion,2003.
[4]胡进军,谢礼立.地下地震动频谱特点研究[J].地震工程与工程振动,2004,24(6):2-8.Hu J J,Xie L L.Spectral characteristics of earthquakesub-ground motions[J].Earthquake Engineering andEngineering Vibration,2004,24(6):2-8.
[5]肖文海.大型河谷场地地震动特征研究[D].哈尔滨:中国地震局工程力学研究所,2009.Xiao W H.Research on ground motion characteristicat the site of large-scale valley[D].Harbin:Instituteof Engineering Mechanics of China Earthquake Admi-nistration,2009.
[6]张玉敏.大型地下洞室群地震响应特征研究[D].武汉:中国科学院武汉岩土力学研究所,2010.Zhang Y M.Study on response characteristics of largeunderground cavern group under earthquake[D].Wu-han:Institute of Rock and Soil Mechanics,Chinese A-cademy of Sciences,2010.
[7]胡聿贤.地震工程学[M].北京:地震出版社,2006.Hu Y X.Earthquake Engineering[M].Beijing:Seis-mological Press,2006.
[8]Kramer S L.Geotechnical Earthquake Engineering[M].New Jersey,USA:Prentice-Hall,1996.
[9]Arias A.A measure of earthquake intensity[C]∥Seis-mic Design for Nuclear Power Plants.Cambridge:MIT Press,1970.438-483.
[10]Bommer J J.Martínez-Pereira A.The effective dura-tion of earthquake strong motion[J].Journal of Earth-quake Engineering,1999,3(2):127-172.
[11]Trifunac M D,Brady A G.A study on the duration ofstrong earthquake ground motion[J].Bulletin of theSeismological Society of America,1975,65(3):581-626.
[12]李英民,王丽萍,赵耀.岩质坡地建筑设计水平地震动放大系数的确定[J].地震工程与工程振动,2010,30(4):159-165.Li Y M,Wang L P,Zhao Y.Amplification factors ofdesign horizontal ground motions for structures onrock slopes[J].Journal of Earthquake Engineering andEngineering Vibration,2010,30(4):159-165.
[13]李英民,王丽萍,赵耀.坡地地形对竖向地震动反应谱特性的影响分析[J].地震工程与工程振动,2010,30(5):156-161.Li Y M,Wang L P,Zhao Y.Influence of slope terrainon characteristics of vertical ground motion responsespectra[J].Journal of Earthquake Engineering andEngineering Vibration,2010,30(5):156-161.
[14]荣棉水,李小军.局部地形对出平面运动谱特性的影响分析[J].中国地震,2007,23(2):147-156.Rong M Sh,Li X J.The effect analysis of topographyon the spectrum property of anti-plane movement[J].Earthquake Research in China,2007,23(2):147-156.
[15]崔臻,盛谦,刘加进,等.基于小波包的地下洞室群地震响应及其频谱特性研究[J].岩土力学,2010,31(12):3525-3530.Cui Zh,Sheng Q,Liu J J,et al.Spectrum characte-ristics analysis of seismic response for undergroundhouses via wavelet packet[J].Rock and Soil Mecha-nics,2010,31(12):3525-3530.
[16]盛谦,崔臻,刘加进,等.传递函数在地下工程地震响应研究中的应用[J].岩土力学,2012,33(8):2253-2258.Sheng Q,Cui Zh,Liu J J,et al.Application study oftransfer function for seismic response analysis of un-derground engineering[J].Rock and Soil Mechanics,2012,33(8):2253-2258.
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