简介：ＢｉｎｏｍｉａｌｍｏｄｅｌｏｎｓｅｉｓｍｉｃｒｉｓｋａｎａｌｙｓｉｓＪｉａｎＷＡＮＧ（王健）ａｎｄＺｈｅｎ－ＬｉａｎｇＳＨＩ（时振梁）（ＩｎｓｔｉｔｕｔｅｏｆＧｅｏｐｈｙｓｉｃｓ，ＳｔａｔｅＳｅｉｓｍｏｌｏｇｉｃａｌＢｕｒｅａｕ，Ｂｅｉｊｉｎｇ１００...

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简介：六个增强的具体框架与或没有石工技术填入在水平周期的负担下面被构造并且测试。所有六个框架有在列的横向的加强被没为可锻的框架遇见currentACI说明的矩形的箍在提供的相同细节。为比较目的，在三个这些框架的列是由carbon-fiber-reinforced-polymer(CFRP)的jacketed避免的表可能砍失败。Anonlinear闲差事分析，单个元素的力量变丑关系基于ACI318，FEMA356，和陈在被形成“s模型，为这些框架并且与测试结果相比被执行。这些框架的行为上的填入的失败机制和影响在学习被检验。从现在的分析的结论为infilled水泥框架大楼结构的评估和设计向结构的工程师提供珍贵信息。

简介：Theconceptofstatevectorstemsfromstatisticalphysics,whereitisusuallyusedtodescribetheevolutionofacontinuumfieldinitswayofcoarse-graining.Inthispaper,thestatevectorisemployedtodepicttheevolutionofseismieityquantitatively,andsomeinterestingresultsarepresented.Theauthorsinvestigatedsomefamousearthquakecases(e.g.,theHaiehengearthquake,theTangshanearthquake,thewestKuulunMountainsearthquake,etc.)andfoundthatthestatevectorsevidentlychangepriortotheoccurrenceoflargeearthquakes.Thusitisbelievedthatthestatevectorcanbeusedasakindofprecursortopredictlargeearthquakes.

简介：到动态系统的可靠性分析的僵绳点近似的应用程序被调查。处于可靠性问题的失败事件在规定阀值水平上作为一个单个性能变量的exceedance被提出。僵绳点近似技术提供一种选择估计表演变量的累积分布函数(CDF)。失败概率在指定阀值作为补充CDF的价值被获得。方法要求从取决于产生性能变量的功能(CGF)的cumulant的一个简单代数学的方程计算僵绳点。为用表演变量的随机的样品计算僵绳点的一个方法被介绍。僵绳点近似的适用的区域详细被讨论。A10故事砍与白噪音刺激造模型说明建议方法论的精确性和效率。

简介：在过去的地震基于海底的电报的表演，在海床差错运动下面决定电报性能的一个分析方法在这篇论文被建议。首先，海底的电报的地震损坏的普通类型被总结，它包括差错运动，海底的山崩和海床土壤液化导致的海床排水量，等等。损坏类似于观察到跟随陆地地震的埋葬的管道的损坏。2006年12月26日的Hengchun地震被用作案例研究。M7.2地震在20:26北京时间在华南海发生了，并且引起了14国际海底的电报切断并且碎。结果证明建议方法预言类似于在Hengchun地震观察了那的损坏。基于水深度和海底的地震的大小的影响的参量的研究，阻止损坏到海底的电报的反措施被建议。

简介：ＡｎａｌｙｓｉｓｏｎｒｕｐｔｕｒｅｆｅａｔｕｒｅｏｆａｇｒｅａｔｃｏｍｐｌｉｃａｔｅｄｅａｒｔｈｑｕａｋｅｉｎＫａｍｃｈａｔｋａＹＵＡＮＧＡＯ１）（高原）ＳＩＨＵＡＺＨＥＮＧ１）（郑斯华）ＨＵＩＬＡＮＺＨＯＵ２）（周蕙兰）ＺＨＥＮＬＩＵ２）（...

简介：Macroscopicanomaliesfrom"EarthquakeCasesinChina"arestatisticallyanalyzedinthispaper.Theconclusionisasfollows:Theprobabilityofoccurrenceofmacroscopicanomaliesbeforeearthquakesincreaseswithmagnitude.Thelargertheearthquakemagnitude,themoremacroscopicanomaliesappear.Thetemporaldistributionofmacroscopicanomaliesisasfollows:Therearefewmacroscopicanomaliesatbeginning;astimegoeson,thenumberofmacroscopicanomaliesincreases;theincreaseofmacroscopicanomalyquantityaccelerateswiththeimpendingearthquakeandreachesaclimaxwhentheearthquakebreaksout.Thespatialdistributionpatternofmacroscopicanomaliesisasfollows:macroscopicanomaliesappearattheepicenteratthebeginning,thenspreadout,andfinallyariseexplosivelyattheepicenterarea.

简介：ＡｐｐｌｉｃａｔｉｏｎｏｆＰＰｃｌｕｓｔｅｒｍｅｔｈｏｄｉｎｔｈｅｅａｒｔｈｑｕａｋｅｓｗａｒｍａｎａｌｙｓｉｓＳｈｉ－ＹｏｎｇＺＨＯＵ；（周仕勇）Ｌｉｎｇ－ＲｅｎＺＨＵ；（朱令人）ａｎｄＣｈｕａｎ－ＬｉｎｇＤＥＮＧ（邓传玲）（Ｓｅｉｓｍｏｌｏｇｉｃ...

简介：Afrequencyandspatialdomaindecompositionmethod(FSDD)foroperationalmodalanalysis(OMA)ispresentedinthispaper,whichisanextensionofthecomplexmodeindicatorfunction(CMIF)methodforexperimentalmodalanalysis(EMA).ThetheoreticalbackgroundoftheFSDDmethodisclarified.Singularvaluedecompositionisadoptedtoseparatethesignalspacefromthenoisespace.Finally,anenhancedpowerspectrumdensity(PSD)isproposedtoobtainmoreaccuratemodalparametersbycurvefittinginthefrequencydomain.Moreover,asimulationcaseandanapplicationcaseareusedtovalidatethismethod.

简介：越过在为印度尼西亚地震的印度尼西亚下面的地球结构的S波浪速度通过震动图分析被调查了，同时在时间领域和三个笛卡儿的部件。数据在DAV观察车站被记录，菲律宾。主要数据集合是震动图比较在之间测量并且合成震动图而不是旅行时间数据，当通常在另外的地震学上的研究使用了。合成震动图用GEMINI方法被计算，它在一种古灵长类动物的全球地球披风给背离合成震动图并且更早有的震动图比较表演上面等价于模式Summation.The到达时间比那些测量。在上面的披风层的h的坡度被改变进在一种古灵长类动物模型说了的一个积极，而非否定的斜坡，并且否定修正在所有地球披风层被强加到多项式的系数的零份订单。优秀试穿，以及旅行时间或波形，从爱和瑞利，的表面波浪被获得表面象核心一样向S和SS披风波浪招手地球披风分开的反映的waves.This结果快车，由于在印度和亚洲之间的碰撞构造释放地区，地球披风层在所有在S波浪速度和垂直anisotropy有一个否定异例。

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简介：一种技术到的二重要延期为一个明确的假动态算法执行非线性的错误繁殖分析(Chang，2003)被介绍。一个人从给定的时间步扩大稳定性学习到一个完全的一步一步的集成过程。它是证明的经分解那条保证稳定性条件在每次，步导致全部一步一步的集成过程的稳定的计算。非线性的错误繁殖结果的另外的延期表演，它为自由(SDOF)的非线性的单个度被导出系统，能被用于自由(MDOF)的非线性的多重度系统。这个应用程序依赖于系统在的自然频率的决心每次走，自从所有数字性质和错误繁殖，在时间步的性质是仔细与这些频率有关。结果从非线性的步度被导出。非线性的即时度被介绍代替非线性的步度并且被显示在实践易用。延期能也被用于基于非线性，和因此步力量适当地被选择在测试以前执行假动态测试的一时间的即时度从一个SDOF系统导出的结果。

简介：Steel-concretecompositestructuresthatsharetheadvantagesofbothsteelstructureandconcretestructurehavebeendevelopedrapidlyandusedwidely.Ithasbeenapopularstructureinhigh-risebuildingsinrecentyears.Althoughmoreandmorecompositestructureshavebeenusedinearthquakearea,onlyafewliteraturesaboutfragilityanalysisofthistypeofstructureareavailable.Inthispaper,afragilityanalysismethodbasedonperformanceisproposed,inwhichboththeuncertaintyduetovariabilityinstructuresandgroundmotionareconsidered.Seismicfragilityanalysisisperformedfora15-storycompositebeam-concrete-filledsquaresteeltubecolumnframebytheproposedmethod.Thetop-drift-angleandthestory-drift-angleareusedasquantitativeindexestodefinethefourdifferentperformancelevels.Thenseismicdemandprobabilityanalysisiscarriedoutandfragilitycurvesarederivedtoassesstheseismicperformanceofthistypeofstructure.

简介：Basedonthesitehistoricalearthquakedata,amethodofseismicriskanalysisispresented.Oncethefrequencyofearthquakeresponseintensityandtherelativevalueshowedalogarithmiclinear,themaximumsimilaritymethodwouldbeusedtoobtainβ,λ,andImax,andalsoachievetheresultsofriskanalysisoneachsite.Atthesametime,the"logictree"methodcanbeusedtocalibratetheuncertaintyoftheriskoneachsite.Thenthefinalresultsofriskanalysisindicatethatthismethodisfeasible,particularlyforthesitesshowingintensityanomaly.

简介：Ａｎａｌｙｓｉｓｏｆｆｏｒｅｓｈｏｃｋｓｅｑｕｅｎｃｅｏｆｔｈｅ１９７５ＨａｉｃｈｅｎｇｅａｒｔｈｑｕａｋｅｏｆＭｓ７．３Ｚｈａｏ－ＲｏｎｇＺＵＯ（左兆荣）；Ｊｉａｎ－ＰｉｎｇＷＵ（吴建平）ａｎｄＺｈｉ－ＬｉｎｇＷＵ（巫志玲）（Ｉｎｓｔｉｔｕｔｅｏｆ...

简介：AsimplifiedfragilityanalysisoffantypecablestayedbridgesusingProbabilisticRiskAnalysis(PRA)procedureispresentedfordeterminingtheirfailureprobabilityunderrandomgroundmotion.Seismicinputtothebridgesupportisconsideredtobeariskconsistentresponsespectrumwhichisobtainedfromaseparateanalysis.Fortheresponseanalysis,thebridgedeckismodeledasabeamsupportedonspringsatdifferentpoints.Thestiffnessesofthespringsaredeterminedbyaseparate2Dstaticanalysisofcable-tower-decksystem.Theanalysisprovidesacoupledstiffnessmatrixforthespringsystem.Acontinuummethodofanalysisusingdynamicstiffnessisusedtodeterminethedynamicpropertiesofthebridges.Theresponseofthebridgedeckisobtainedbytheresponsespectrummethodofanalysisasappliedtomultidegreeoffreedomsystemwhichdulytakesintoaccountthequasi-staticcomponentofbridgedeckvibration.Thefragilityanalysisincludesuncertaintiesarisingduetothevariationingroundmotion,materialproperty,modeling,methodofanalysis,ductilityfactoranddamageconcentrationeffect.ProbabilityoffailureofthebridgedeckisdeterminedbytheFirstOrderSecondMoment(FOSM)methodofreliability.Athreespandoubleplanesymmetricalfantypecablestayedbridgeoftotalspan689m,isusedasanillustrativeexample.Thefragilitycurvesforthebridgedeckfailureareobtainedunderanumberofparametricvariations.Someoftheimportantconclusionsofthestudyindicatethat(i)notonlyverticalcomponentbutalsothehorizontalcomponentofgroundmotionhasconsiderableeffectontheprobabilityoffailure;(ii)groundmotionwithnotimelagbetweensupportexcitationsprovidesasmallerprobabilityoffailureascomparedtogroundmotionwithverylargetimelagbetweensupportexcitation;and(iii)probabilityoffailuremayconsiderablyincreaseforsoftsoilcondition.

简介：Digitaldataofprecursorsisnotedforitshighaccuracy.Therefore,itisimportanttoextractthehighfrequencyinformationfromthelowonesinthedigitaldataofprecursorsandtodiscriminatebetweenthetrendanomaliesandtheshort-termanomalies.Thispaperpresentsamethodtoseparatethehighfrequencyinformationfromthelowonesbyusingthewavelettransformtoanalyzethedigitaldataofprecursors,andillustrateswithexamplesthetrainofthoughtsofdiscriminatingtheshort-termanomaliesfromtrendanomaliesbyusingthewavelettransform,thusprovideaneweffectiveapproachforextractingtheshort-termandtrendanomaliesfromthedigitaldataofprecursors.

简介：Itisnoteasytocontrolhumidityinageomagneticroom.Ifhumidityistoohighorthechangeistoofastitwillleadtoanabnormalchangeondata.Theintelligentreal-timehumidityanalysisandmonitoringsystemofageomagneticroomandprobecannotonlymonitoranddisplaythechangeofhumidityinthegeomagneticroomandsendanalarmsignalwhenitexceedsthepre-setrange,butalsodehumidifyintelligently.Onecanarbitrarilycontrolthesensortomonitortheambienthumidityoftheprobeinordertoensurethatthedataisstableandtrue.Thedesignideaandmainfunctionsofthesystemareintroducedinthepaper.

简介：BasedontheseismicobservationreportdataprovidedbytheXinjiangDigitalSeismicNetworkfrom2009to2014,wecalculatethewavevelocityratioanditsbackgroundvalueformediumandsmallearthquakesbyusingthemulti-stationmethodinTianshan,Xinjiang.Thispaperanalyzesthevariationofthewavevelocityratiodisturbancevaluetohighlighttheabnormal,andalsoback-traces7moderateearthquakesattheresearcharea.Theresultsshowthat:(1)thebackgroundvalueofthewavevelocityratioisalmost1.70,thewavevelocityratioobviouslydecreasesinthemiddle-easternpartofTianshanandtheregionnearthePuchangfault;(2)thewavevelocityratiodisturbancevalueismostlylowintheepicenterbeforefourearthquakesofM≥5.0from2011to2013inthestudyarea;(3)before7moderatestrongearthquakes,theearthquakeeventswithlowvalueofthewavevelocityratioaccountforover60%ofcorrespondingtotaleventsneartheepicenters,andthelowvalueofthewavevelocityratioisrelativelyobviousbeforemoderateearthquakes.