1966年以来华北地区一系列七级大震破裂过程的数值模拟

详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文

英文篇名：NUMERICAL SIMULATION FOR RUPTURE PROCESSES OF A SERIES OF STRONG EARTHQUAKES (M_S>7) IN NORTH CHINA SINCE 1966 中文刊名：地球物理学报 英文刊名：Chinese Journal of Geophysics 作者：陈祖安 ; 白武明 ; 林邦慧 ; 王新华 ; 许国凯 ; 张瑞清 ; 黄为清 英文作者：CHEN ZUAN 1 BAI WUMING 1 LIN BANGHUI 2 WANG XINHUA 3 XU GUOKAI 3 ZHANG RUIQING 2 HUANG WEIQING 1 1 Institute of Geology and Geophysics ; Chinese Academy of Sciences ; Beijing 100029 ; China 2 Institute of Geophysics ; Chinese Seismological Bureau ; Beijing 100081 ; China 3 Manifold Engineering Company ; California ; USA 中文关键词：非连续变形分析方法 ; 活动地块动力学假说 ; 数值模拟 ; 动力学过程 英文关键词：Discontinuous deformation analysis(DDA) ; Active block hypothesis ; Numerical simulation ; Dynamics process. 出版日期：2003-05-17 机构：中国科学院地质与地球物理研究所,中国科学院地质与地球物理研究所,中国地震局地球物理研究所,Manifold Engineering Company,Manifold Engineering Company,中国地震局地球物理研究所,中国科学院地质与地球物理研究所 北京100029 ,北京100029 ,北京100081 ,California USA ,California USA ,北京100081 ,北京100029 年：2003 期：03 出版单位：地球物理学报

摘要

用非连续变形分析方法 (DDA +FEM)数值模拟 ,在华北地区各地块相互制约的块体系统环境中 ,地块边界断层上发生 196 6年邢台地震、196 9年渤海地震、1975年海城地震、1976年唐山地震等不同类型破裂模式大震的破裂过程 .数值模拟结果给出每个大震释放的主应力场 ,最大剪应力变化等值线图 ,地震前后位移变化矢量图 ,发震断层滑移随时间变化以及走滑错距和应力降等震源参数 .这些结果与地震的震源机制 ,用地震波资料研究得到的震源参数 ,宏观等震线 ,地表观测的水平位移矢量图基本一致 .其中 196 9年渤海地震正交破裂模式的结果与宏观等震线及小震分布图像更接近 .1976年唐山地震复杂震源模式与该震早期余震分布图像更相符 .表明用DDA +FEM方法进行数值模拟研究 ,能较好地模拟地震破裂过程 .
The different rupture processes of strong earthquakes (M S=7), such as Xingtai earthquake in 1966, Bohai earthquake in 1969, Haicheng earthquake in 1975, and Tangshan earthquake in 1976, which occurred on the boundary faults of blocks in North China and in the systematic environment of tectonic blocks under mutually restricting, are simulated numerically by discontinuous deformation Analysis (DDA+FEM). In the paper, the results of numerically simulating include the principal stress field released in every large earthquakes, the contour picture of maximum shear stress change, the vector picture of displacement caused by the earthquakes, the sliding displacement on faults with time, the maximum strike sliding distance and stress drop. These results agree basically with focus mechanism, focus parameters from seismic wave, macroscopic isoseisms and horizontal displacement vector map from observation on surface of earth. Furthermore,the imageof contour picture of maximum shear stress change on orthographically rupture mode of Bohai earthquake in 1966is closer with the macroscopic isoseismal picture. The results about the complex focus of Tangshan earthquake in 1976 are more accordant with aftershock distribution picture at early period of the earthquake. It is indicated that DDA+FEM is a very suitable tool to simulate rupture process of earthquakes.

引文

[1]　ShiG ,GoodmanRE .Discontinuousdeformationanalysis:Anewmethodforcomputingstress,strain,andslidingofblocksystem.Proceedingsofthe29thU .S .SymposiumonKeyQuestioninRockMechanics,1988.381～393
    [2]　ShiGH ,GoodmanRE .Two dimensionaldiscontinuousdeformationanalysis.Int.J .Numer.Anal.Math.Geomech.1985,8:541～556
    [3]　LanboLiu.ModelingaseismicfaultslipandblockdeformationinnorthernChinaByDDA .ProceedingoftheFirstInternationalForumonDDAandSimulationofDiscontinuousMedia.Berkley,California,1996.373～382
    [4]　YongenCai,TaoHe,RenWang.NumericalsimulationofdynamicprocessofthetangshanearthquakebyanewmethodLDDA .PureAppl.Geophys,2000,157,2083～2104
    [5]　邓启东,范福田.华北地块区新生代、现代地质构造特征,华北断块区的形成与发展.北京:科学出版社,1980.192～205DENGQidong,FANFutian.CenozoicandRecentGeotectonicCharacteristicsofNorthChinaFaultBlockRegion.FormationandDevelopmentofTheNorthChinaFaultBlockRegin.Beijing:SciencesPress,1980.192～205
    [6]　胡小辛,林邦慧.邢台地震空间分布随时间变化的立体图像与地震发生过程.地震学报,1989,11(1):1～11HUXiaoxin,LINBanghui.Stereoscopicfiguresofthetime variationinthespacedistributionoffocioftheXingtaiearthquakesandtheiroccurrenceprocedure.ActaSeismologicaSinica,1989,11(1):1～11
    [7]　吴忠良,臧绍先.用体波合成地震图方法确定渤海,永善两大地震的震源参数.地震学报,1991,13(1):1～8WUZhongliang,ZANGShaoxian.SourceparametersofBohaiEarthquakeofJuly18,1969andYongshanearthquakeofMay11,1974fromsyntheticseismogramofbodywaves.ActaSeismologicaSinica,1991,13(1):1～8
    [8]　林邦慧,陈运泰,魏富胜.不对称双侧破裂过程的研究及其在海城地震的应用.地震学报,1979,1(2):133～149LINBanghui,CHENYuntai,WEIFusheng.AstudyofasymmetricallybilateralruptureprocesswithapplicationtotheHaichengearthquake.ActaSeismologicaSinica,1979,1(2):133～149
    [9]　胡小辛,林邦慧.1976年唐山地震空间分布随时间变化的图像及其分析.地震学报,1993,15(Suppl.):535～544HUXiaoxin,LINBanghui.Imageandanalysisofthespatialdistributionchangewithtimeon1976TangshanEarthquake.ActaSeismologicaSinica,1993,15(Suppl.):535～544
    [10]　NabelekJ ,ChenWP .TheTangshanearthquakesequenceanditsimplicationsfortheevolutionoftheNorthChinaBasin.J.Geophys.Res.,1987,92(B12):625～628
    [11]　地震局《一九七六年唐山地震》编辑组.梅世蓉主编.一九七六年唐山地震.北京:地震出版社,1982EditorialGroupofChinaSeismologicalBureau.ChiefEditorMEIShirong.1976TangshanEarthquake.Beijing:SeismologicalPress,1982
    [12]　ButlerR ,StewartGS ,KanamoriH .TheJuly27,1976Tangshan,ChinaearthquakeAcomplexsequenceofintraplateevents.Bull.Seism.Soc.Amer.,1979,69(1):207～220
    [13]　ZhengkangShen,ChengkunZhao,AnYin,etal.ContemporarycrustaldeformationineastAsiaconstrainedbyGlobalPositionSystemmeasurements.J.Geophys.Res.2000,105(3):5721～5734
    [14]　许忠淮,汪素云,黄雨蕊等.由大量的地震资料推断我国大陆构造应力场.地球物理学报,1989,32(6):636～647XUZhonghuai,WANGSuyun,HUANGYuxin,etal.ThetectonicstressfieldofChinesecontinentdeducedfromagreatnumberofearthquakes.ChineseJ .ofGeophys.(ActaGeophysicaSinica),1989,32(6):636～647
    [15]　臧绍先,宁杰远,刘宝诚等.中国周边板块的相互作用及其对中国应力场的影响—Ⅰ.太平洋板块,菲律宾海板块的影响.见:八十年代中国地球物理学进展.北京:学术书刊出版社,1989.293～305ZANGShaoxian,NINGJieyuan,LIUBaocheng,etal.TheInteractionofPlatesaroundChina:Part1,theInfluenceofPacificPlateandPhilippineSeaPlate.In:GeophysicsinChinaintheEighties.Beijing:AcademicPress,1989.293～305
    [16]　林邦慧,董大南,林纪曾等.用复合型法反演震源破裂过程的研究.地震学报,1988,10(4):337～351LINBanghui,DONGDanan,LinJizeng,etal.Astudyontheinversionofruptureprocessbyusingthecompoundmodelmethod.ActaSeismologicaSinica,1988,10(4):337～351
    [17]　张肇成主编.中国震例.北京:地震出版社,1988ChiefEditorZHANGZhaocheng.EarthquakeCasesinChina.Beijing:SeismologicalPress,1988
    [18]　周蕙兰,刘　斌.混和波第一峰(谷)值法判断断层面和1969年渤海大震发震断层探讨-渤海地震研究(一).中国地震,1991,4(2):72～79ZHOUHuilan,LIUBin.Assessmentonearthquake faultingfromitsconjugatebyusingfirstpeakortroughofmixedPorSH wavesstudyontheBohaiEarthquake(1).EarthquakeResearchinChina,1991,4(2):72～79
    [19]　林邦慧,胡小辛.1975年2月4日海城地震的破裂过程与海城地震序列空间分布的图像.中国地震,1988,4(2):49～58LINBanghu