敦煌莫高窟潜在地震变形数值模拟
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摘要
在研究莫高窟地区地震地质条件及潜在地震危险性分析的基础上,基于地震的断层弹性位错理论,采用位移水平分布的抛物线模型,假定三危山断层分别发生5.5、6.0和6.5级地震情况下,用三维有限元的方法分析计算了莫高窟地区的潜在地震变形。给出了在震级5.5、6.0及6.5级三种情况断层逆冲和水平走滑两种活动方式下,莫高窟区的地震位移和应变值,供石窟的抗震设防加固设计参考。
Based on the seismo-geological conditions and the potential seismic risk analysis, the authors assess the potential earthquake deformation in Mogao Grottoes area using a 3-D finite element model with a parabola model for horizontal seismic displacement distribution. The seismic displacement and strain are simulated for three seismic magnitudes (Ms): 5.5, 6.0 and 6.5 under the fault activity manner of thrusting and horizontal sliding, which provides guidelines for the design of earthquake resistance and grottoes protection.
Based on the seismo-geological conditions and the potential seismic risk analysis, the authors assess the potential earthquake deformation in Mogao Grottoes area using a 3-D finite element model with a parabola model for horizontal seismic displacement distribution. The seismic displacement and strain are simulated for three seismic magnitudes (Ms): 5.5, 6.0 and 6.5 under the fault activity manner of thrusting and horizontal sliding, which provides guidelines for the design of earthquake resistance and grottoes protection.
引文
[1]袁道阳,石玉成,王旭东.敦煌莫高窟地区断裂新活动特征及其对石窟的影响[J].敦煌研究,2001,(1):56～64.YanDaoyang,ShiYucheng,WangXiudong.TheNewlyActive CharacteristicsoftheFaultsinDunhuangMogaoGrottoesRegion andtheEffectstoGrottoes.DunhuangResearch,2001,(1):56～64.
[2]张裕明,柳覃卓.敦煌三危山———一条无强震的第四纪活动断层[J].中国地震,1989,5(3):37～48.ZhangYumin,LiuTanzhuo.TheSanweishanFault:aQuaternary ActiveFaultwithoutLargeEarthquakes,EarthquakeResearchin China,1989,5(3):37～48.
[3]周本刚,冉洪流.工程活动断裂鉴定的时限标准讨论[J].工程地质学报,2002,10(3):274～278.ZhouBengang,RanHongliu.DiscussionontheTimeCriterionfor IdentifyingEngineeringActiveFaults.JournalofEngineeringGe ology,2002,10(3):274～278.
[4]郭增建,秦保燕.震源物理[M].北京:地震出版社,1979.GuoZengjian,QingBaoyan.HypocentralPhysics.Beijing:Seimo logicalPress,1979.
[5]陈运泰,林邦慧,林中洋等.根据地面形变的观测研究1966年邢台地震的震源过程[J].地球物理学报,1975,18(3):164～182.ChenYuntai,LinBanghui,LinZhongyangetc.StudyontheHy pocentralProcessofXingtaiEarthquakein1966bytheGround DeformationObservation.ChineseJournalofGeophysics,1975,18(3):164～182.
[6]李愿军.核安全导则中的地震震级划分意义[J].工程地质学报,1993,1(2):62～65.LiYuanjun.ImplicationsofEarthquakeMagnitudeDivisioninNu clearSafetyGuideRule.JournalofEngineeringGeology,1993,1(2):62～65.
[7]郭增建,秦保燕.地震成因和预报[M].北京:地震出版社,1991.GuoZengjian,QingBaoyan.TheSeismogenesisandPredictionof Earthquake.Beijing:SeimologicalPress,1991.
[8]国家地震局地震测量队.1966年邢台地震的地形变[J].地球物理学报,1975,18(3):153～163.SeismicSurveyTeamofChineseSeismologicalBureau.The GroundDeformationofXingtaiEarthquakein1966.ChineseJour nalofGeophysics,1975,18(3):153～163.
[2]张裕明,柳覃卓.敦煌三危山———一条无强震的第四纪活动断层[J].中国地震,1989,5(3):37～48.ZhangYumin,LiuTanzhuo.TheSanweishanFault:aQuaternary ActiveFaultwithoutLargeEarthquakes,EarthquakeResearchin China,1989,5(3):37～48.
[3]周本刚,冉洪流.工程活动断裂鉴定的时限标准讨论[J].工程地质学报,2002,10(3):274～278.ZhouBengang,RanHongliu.DiscussionontheTimeCriterionfor IdentifyingEngineeringActiveFaults.JournalofEngineeringGe ology,2002,10(3):274～278.
[4]郭增建,秦保燕.震源物理[M].北京:地震出版社,1979.GuoZengjian,QingBaoyan.HypocentralPhysics.Beijing:Seimo logicalPress,1979.
[5]陈运泰,林邦慧,林中洋等.根据地面形变的观测研究1966年邢台地震的震源过程[J].地球物理学报,1975,18(3):164～182.ChenYuntai,LinBanghui,LinZhongyangetc.StudyontheHy pocentralProcessofXingtaiEarthquakein1966bytheGround DeformationObservation.ChineseJournalofGeophysics,1975,18(3):164～182.
[6]李愿军.核安全导则中的地震震级划分意义[J].工程地质学报,1993,1(2):62～65.LiYuanjun.ImplicationsofEarthquakeMagnitudeDivisioninNu clearSafetyGuideRule.JournalofEngineeringGeology,1993,1(2):62～65.
[7]郭增建,秦保燕.地震成因和预报[M].北京:地震出版社,1991.GuoZengjian,QingBaoyan.TheSeismogenesisandPredictionof Earthquake.Beijing:SeimologicalPress,1991.
[8]国家地震局地震测量队.1966年邢台地震的地形变[J].地球物理学报,1975,18(3):153～163.SeismicSurveyTeamofChineseSeismologicalBureau.The GroundDeformationofXingtaiEarthquakein1966.ChineseJour nalofGeophysics,1975,18(3):153～163.
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