简介：Athree-dimensionalrigidbodyontheshapeofaparallelepipedismodelledinordertorockonasideoravertexofthebase,inordertoevaluatetheseismicresponseofrigidblockslyingonahorizontalsupport.Thecenterofmassofthebodyisconsideredaseccentricwithrespecttoitsgeometriccenter.Asseismicinput,threeItalianrecordedaccelerograms,withdifferentspectralcontent,areused.Thestudyismainlyconductedtohighlightthedifferencesbetweentheseismicresponseof2Dand3Dmodelsofrigidblocks,withtheaimtounderstandif,insomecases,theuseofthe3Dmodelofrigidblockisrequiredtoobtainsaferresults.Infact,theoutcomesshowthatinsomerangesofthegeometricalandmechanicalparametersthatcharacterizetheexcitationandthebody,atwo-dimensionalmodel,whichisnotabletoconsiderthe3Drockingonavertex,canprovideunsaferesults.Inparticular,itisfoundthattheoverturningprocessofthethree-dimensionalblockcanoccurunderexcitationswhicharelowerthanthosewhichoverturnacorrespondingtwo-dimensionalblock.

简介：ＳｔｕｄｙｏｎｃｏｒｒｅｌａｔｉｖｉｔｙａｍｏｎｇｃａｐａｃｉｔｙｄｉｍｅｎｓｉｏｎＤ０，ｉｎｆｏｒ－ｍａｔｉｏｎｄｉｍｅｎｓｉｏｎＤ１，ａｌｇｏｒｉｔｈｍｉｃｃｏｍｐｌｅｘｉｔｙＣ（ｎ）ａｎｄｂＶａｌｕｅＷＥＩ－ＢＩＮＨＡＮ（韩渭宾），ＧＵＩ－Ｘ...

简介：本文根据地震应急信息产品管理、更新以及共享的需要，针对地震应急信息产品的属性、服务、时间、传递等特性，在借鉴地震应急基础理论研究以及相关行业分类标准基础上，研究了地震应急信息产品的分类方法，设计了分类编码结构，其成果可提高各地震应急专业技术系统之间的兼容性，提升应急信息产品的使用效率。

简介：

简介：Theconventionalpseudo-staticapproachoftenneglectstheeffectoftheverticalseismicaccelerationonthestabilityofaslope,butsomeanalysesunderplane-strain(2D)conditionsshowasignificanteffectontheslopestability.Thepurposeofthisstudyistoinvestigatetheeffectoftheverticalaccelerationonthesafetyofthree-dimensional(3D)slopes.Inthestrictframeworkoflimitanalysis,a3Dkinematicallyadmissiblerotationalfailuremechanismisadoptedherefor3Dhomogeneousslopesinfrictional/cohesivesoils.Asetofstabilitychartsispresentedinawiderangeofparametersfor3Dslopesundercombinedhorizontalandverticalseismicloadingconditions.Accountingfortheeffectsoftheverticalseismicacceleration,thedifferenceinsafetyfactorsfor3Dslopescanexceed10%,whichwillsignificantlyoverestimatethesafetyofthe3Dslopes.

简介：

简介：为适应防震减灾事业的发展,对《地震档案分类表》的进一步完善提出建议。

简介：近5年来，乌鲁木齐4号泉水中甲烷含量逐年呈趋势性降低。本文从泉点地质构造、水文地球化学环境入手，结合水文气象资料，分析并论正了甲烷逐年趋势性变化的原因。

简介：ＡｍｏｄｅｌｏｆｓｅｉｓｍｉｃｉｔｙｗｉｔｈｆｒａｃｔａｌｓｔｒｕｃｔｕｒｅｓａｎｄａｐｒｅｌｉｍｉｎａｒｙｄｉｓｃｕｓｓｉｏｎｏｎｔｈｅｒｅｌａｔｉｏｂｅｔｗｅｅｎＤａｎｄｂｖａｌｕｅＨａｔ－ＫｕｎＪＩＡＮＧ（蒋海昆）ａｎｄＳｈｏｕ－ＺｈｏｎｇＤＩ...

简介：Ｐｒｅｌｉｍｉｎａｒｙｒｅｓｕｌｔｏｆ３ＤｇｒａｖｉｔａｔｉｏｎａｌｆｏｒｗａｒｄｃａｌｃｕｌａｔｉｏｎｓｔｕｄｙｉｎＢｏｈａｉＳｅａＧＵＡＮＧＸＩＡＬＩＵ１）（刘光夏）ＷＥＮＪＵＮＺＨＡＯ２）（赵文俊）ＷＥＮＪＵＲＥＮ１）（任文菊）ＸＩＵ...

简介：Theexperimentalresultsof3-Dfractureundercompressionareintroducedinbriefandthetheoryofstresscriterionof3-Dfractureisstudied.Methodstoimitateinitialfracturesaredeveloped.Itispointedthatthereareimportantdefectsintheextremevalue(EV)methodeverproposedbyPalaniswamyandKnauss.ThemajordefectliesinthatonlytwoEulerangles(2EA)areconsidered,butanotheroneisneglected.IfthevariationofallthethreeEulerangles(3EA)areconsidered,onecangetbetterresultwhichisconsistentwiththeobservationoffaultingthatextendsoncurvedsurfacesbutnotonplanes.Themethodofevaluatingmaximalnormalstressdirectionvector(NSDV)isproposedandfurtherprovedtobeequivalenttothe3EAmethod.ItisprovedthattheNSDVmethodcanbefurtheroptimizedtothemethodofcompositionofthefirstprincipaldifferentialplane(CFPDP).TheresultsfromCFPDPmethodcanfitthecurvedsurfacesofinitialgrowthobservedintheexperimentsof3-Dfracture.TheCFPDPmethodcanalsobeusedtointerpretthe3-Dfracturesoftheslippingsectionbetweentheasperitiesintheburiedfaultplanethatismodeledasellipsecrack.Theresultsof3-Dfracturecanbeappliedtointerpretingtherelatedproblemsoffaultingincludingthemechanismofalotofshatterrockswithdifferentdimensions,thecauseofearthquakesoccurredattheedgeofplateunderlowshearstress,andthemechanismofanisotropycausedbytheextensivedilatancyanisotropy(EDA)cracks.

简介：研究了山东德州2号井2004年9月11日水氟高值异常变化特点，对水氡高值异常的原因进行了系统的探讨。详细调查影响水氡变化的各种环境因素和人为因素，进行科学的数据分析、合理推断和试验验证。结果表明：该“异常”是由于临近水井抽水引起的干扰，不是地震异常。研究论证了开展流体氡前兆观测与分析预报的同时开展流体氡的动态变化及其影响因素研究的必要性。

简介：依据区域水文地质、地球化学环境特征,研究了濮阳市地震台2号井水化动态的变化原因.濮阳台2号井属多层-混合型井孔,采用双含水层进行水化观测,其水化动态的变化受地下水开采的影响.

简介：Thispaperpresents2.5DscatteringofincidentplaneSHwavesbyacanyoninlayeredhalf-spacebytheindirectboundaryelementmethod(IBEM).Thefreefieldresponseiscarriedouttogivethedisplacementsandstressesonthelinewhichformsboundaryofthecanyon.ThefictitiousuniformmovingloadsareappliedtothesamelinetocalculatetheGreen'sfunctionsforthedisplacementsandstresses.Theamplitudesoftheloadsaredeterminedbytheboundaryconditions.Thedisplacementsduetothefreefieldandfromthefictitiousuniformmovingloadshavetobeaddedtoobtainthewholemotion.Thenumericalresultsarecarriedoutforthecasesofacanyoninhomogenousandinonelayeroverbedrock.Theresultsshowthatthe2.5Dwavescatteringproblemisessentiallydifferentfromthe2Dcase,andthereexistdistinctdifferencesbetweenthewaveamplificationbyacanyoninlayeredhalf-spaceandthatinhomogeneoushalf-space.Thereasonsforthedistinctdifferenceareexplored,andtheeffectsofthethicknessandstiffnessofthelayerontheamplificationarediscussed.

简介：边界条件能显著地在强烈地震下面影响斜坡行为。为了为有限元素(FE)评估边界条件的重要性，一张饮料桌子的模拟在斜坡反应上试验，一验证三维(3D)非线性的FE模型被介绍，并且数字、试验性的结果被比较。为那个目的，基于公开源码的计算站台OpenSees，柔韧的图形的用户接口SlopeSAR被采用，它简化努力集中的预处理和processing以后阶段。网孔决定效果也被探讨。参量的研究被执行在在结束脸包含边界程度和边界条件的三种类型的FE模型上评估边界条件的影响。通常，在边界程度的变化生产不一致的斜坡变丑。为二张结束脸，修理y方向排水量不是适当的模仿饮料桌子实验，结束墙在僵硬、不平。另外，3D的长度的影响倾斜最高的脸和处于二之间的差别的一个重要角色在结束边界条件打的斜坡戏的宽度面对(修理y方向排水量并且修理(y，z)方向排水量)。总的来说，这研究加亮对在模拟和试验性的结果之间的比较的评价竟然与到期的考虑被执行到边界的效果，这调节。

简介：2.5D有限/无限的元素途径被采用学习秘密地移动火车引起的波浪繁殖问题。包括隧道结构和土壤的部分，近的地的不规则被有限元素，和延长到无穷的远地的波浪繁殖性质建模被无限的元素建模。2.5D途径的一个特别特征是它启用一半空间的三维的反应的计算，考虑负担动人效果，用仅仅二维的侧面。尽管有限/无限的元素途径给在学习波浪繁殖的优点由移动引起了的一个伟人看的2.5D训练，注意应该被给计算方面，例如网孔建立的规则，以便避免生产不精密或错误的结果。在这份报纸，某必需品指因为在分析的考虑被加亮，与提高计算的速度的技术一起。这些观察应该在使2.5D成为有限/无限的元素证明有用的所有接近有效的。关键词扎根了颤动-2.5D有限/无限的元素-地下的火车-波浪数字-旁边支持的波浪繁殖：科学委员会在下面资助没有。NSC89-2211-E-002-020

简介：Inthispaper,wedeterminedanearthquakesequencelocationintheXingfengjiangareafromJune,2007toJuly,2014andthe3DP-wavevelocitystructurebyasimultaneousinversionmethod.Onthatbasis,westudiedtheoccurrencefeaturesofactivetectonicsandtheearthquakesourcemechanism.Theresultsshowthatthereservoirfracturesystemhasatendencytoincreasewithgradualdepthfromsoutheasttonorthwest,consistentwithgravitationalfieldresearchresults.Thereare4highvelocityzones(HVZ)underthedepthofthe7km-12kmcrustbetweentheXinfengjiangReservoirdamandXichangDistrict,Dongyuan.ThemaxvelocityofthebiggestHVZwhichisunderXichangis6.3km/s.Underthereservoirdamthereisastrongtectonicdeformationzone,asthecenterexitRenzishifault(F2),Nanshan-Aotoufaults(F4),Heyuanfault(F1)andShijiao-Xingang-Baitianfault(F5),7earthquakeswithML≥5.0(includingM6.1inMarch,1962)occurredatthehighgradientzoneoftheHVZⅢandHVZⅣedgewhichhasbeenunderthereservoirdamsince1960,withrelativityenergyreleasingmorethoroughly.ModerateseismicactivityoccurredattheHVZⅠedgewhichhasbeenunderXichangsince2012,andisadangerzoneforM5.0earthquakesinthefuture.

简介：一个方法被建议在设计实践为使用估计地震soil-structure-interaction(SSI)效果。它对受到的2D结构适用垂直地事件砍波浪由同质的一半空间支持了。自从它保留简洁，方法是吸引人的光谱途径，克服一些困难和存在古典技术的不确，然而，它考虑身体上一致的刺激。简洁的这水平通过回答被完成能被用于免费地的5%阻尼反应系列产出设计的系列修正因素光谱考虑散布运动的纵标由相互作用效果介绍了。修正因素在结构的相对排水量和免费地的运动之间的转移功能(TF)是代表性的，它以它的最大的振幅被描述并且联系了频率。由练习工程师计算修正因素的表情被建议用实际结构的576盒子代表在参量的研究之上基于。方法在跨越大量普通基本颤动时期的10种情况中被测试。

简介：３ＤｓｔｒｕｃｔｕｒａｌｒｅｃｏｎｓｔｒｕｃｔｉｏｎｏｆＭｏｈｏｉｎｔｈｅＴａｎｇｓｈａｎｅａｒｔｈｑｕａｋｅａｒｅａｂｙｕｓｉｎｇｉｎｖｅｒｓｉｏｎｏｆｃｕｒｖｅｄｉｎｔｅｒｆａｃｅＸＩＡＯＬＩＮＧＬＡＩ（赖晓玲）ＸＩＡＮＫＡＮＧＺＨＡＮＧ...

简介：Inthispaper,weproposeanearlyanalyticexponentialtimedifference(NETD)methodforsolvingthe2Dacousticandelasticwaveequations.Inthismethod,weusethenearlyanalyticdiscreteoperatortoapproximatethehigh-orderspatialdifferentialoperatorsandtransformtheseismicwaveequationsintosemi-discreteordinarydifferentialequations(ODEs).Then,theconvertedODEsystemissolvedbytheexponentialtimedifference(ETD)method.WeinvestigatethepropertiesofNETDindetail,includingthestabilityconditionfor1-Dand2-Dcases,thetheoreticalandrelativeerrors,thenumericaldispersionrelationforthe2-Dacousticcase,andthecomputationalefficiency.Inordertofurthervalidatethemethod,weapplyittosimulatingacoustic/elasticwavepropagationinmultilayermodelswhichhavestrongcontrastsandcomplexheterogeneousmedia,e.g.,theSEGmodelandtheMarmousimodel.Fromourtheoreticalanalysesandnumericalresults,theNETDcansuppressnumericaldispersioneffectivelybyusingthedisplacementandgradienttoapproximatethehigh-orderspatialderivatives.Inaddition,becauseNETDisbasedonthestructureoftheLiegroupmethodwhichpreservesthequantitativepropertiesofdifferentialequations,itcanachievemoreaccurateresultsthantheclassicalmethods.