简介：Thelastdecadeorsohasseenthedevelopmentofrefinedperformance-basedearthquakeengineering(PBEE)approachesthatnowprovideaframeworkforestimationofarangeofimportantdecisionvariables,suchasrepaircosts,repairtimeandnumberofcasualties.ThispaperreviewscurrenttoolsforPBEE,includingthePACTsoftware,andexaminesthepossibilityofextendingtheinnovativedisplacement-basedassessmentapproachasasimplifiedstructuralanalysisoptionforperformanceassessment.Detailsofthedisplacement-baseds+eismicassessmentmethodarereviewedandasimplemeansofquicklyassessingmultiplehazardlevelsisproposed.Furthermore,proposalsforasimpledefinitionofcollapsefragilityandrelationsbetweenequivalentsingle-degree-of-freedomcharacteristicsandmulti-degree-of-freedomstorydriftandflooraccelerationdemandsarediscussed,highlightingneedsforfutureresearch.Toillustratethepotentialofthemethodology,performancemeasuresobtainedfromthesimplifiedmethodarecomparedwiththosecomputedusingtheresultsofincrementaldynamicanalyseswithinthePEERperformance-basedearthquakeengineeringframework,appliedtoabenchmarkbuilding.Thecomparisonillustratesthatthesimplifiedmethodcouldbeaveryeffectiveconceptualseismicdesigntool.Theadvantagesanddisadvantagesofthesimplifiedapproacharediscussedandpotentialimplicationsofadvancedseismicperformanceassessmentsforconceptualseismicdesignarehighlightedthroughexaminationofdifferentcasestudyscenariosincludingdifferentstructuralconfigurations.

简介：Thispaperprovidesanoverviewoftheideasandmethodsoftheassessmentofseismicintensitybasedonremotesensinganddescribesthemodelsusedtoassesstheremotesensingbasedsyntheticseismicdamageindexandseismicintensity.Withthedataofdamageinformationextractedfromthehigh-resolutionaerialimagesintheearthquake-strickenareas(Jiegutown,Yushucity,Qinghai)ofthe2010MS7.1Yushuearthquake,andthedataobtainedthroughpost-earthquakefieldinvestigation,theseismicdamagedegreeandseismicintensityhavebeenestimated.TheanalysisoftheresultsshowsthattheseismicintensityinYushucityisestimatedasIXthroughtheRSassessmentmethod,whichisconsistentwiththeresultestimatedaccordingtothegroundsurveys.TheresultsarediscussedinthelastpartofthepaperandindicatethattheRStechniquesareexpectedtobeoneofthemainmethodsusedtoestimatetheseismicintensityvaluesintheemergencystage.

简介：Chinaisacountryofhighseismicitywithmanyhydropowerresources.Recently,aseriesofhigharchdamshaveeitherbeencompletedorarebeingconstructedinseismicregions,ofwhichmostareconcretedams.Theevaluationofseismicsafetyoftenbecomesacriticalproblemindamdesign.Inthispaper,abriefintroductiontomajorprogressintheresearchonseismicaspectsoflargeconcretedams,conductedmainlyattheInstituteofWaterResourcesandHydropowerResearch(IWHR)duringthepast60years,ispresented.Thedamsite-specificgroundmotioninput,improvedresponseanalysis,dynamicmodeltestverification,fieldexperimentinvestigations,dynamicbehaviorofdamconcrete,andseismicmonitoringandobservationaredescribed.Methodstopreventcollapseofhighconcretedamsundermaximumcredibleearthquakesarediscussed.

简介：Theseismicconceptualdesignisanessentialpartofseismicdesigncodes.Itpointsoutthattheterm'seismicconceptualdesign'shouldimplythreeaspects,i.e.,thegivenconceptitself,thespecificprovisionsrelatedtothegivenconceptandthedesigningfollowingtheprovisions.Seismicconceptualdesigncanbeclassifiedintotwocategories:thestrictortraditionalseismicconceptualdesignandthegeneralizedseismicconceptualdesign.Theauthorsaretryingtodefineforbothconceptualdesignstheirconnotationsandstudytheircharacteristics,inparticular,thedifferencesbetweenthem.Authorsemphasizethatbothconceptualdesignssoundveryclose,however,theirdifferencesareapparent.Thestrictconceptualdesignsareusuallyworkedoutdirectlyfromengineeringpracticeand/orlessonslearntfromearthquakedamage,whilethegeneralizedconceptualdesignsareresultedinaseriesofvisionsaimingtorealizethegeneralobjectivesoftheseismiccodes.Thestrictconceptualdesigns,(traditionalconceptualdesigns)areindispensableelementsofseismiccodesinassuringdesignedstructuressaferandthegeneralizedconceptualdesignsareplayingkeyrolesindirectingtoamoreadvancedandeffectiveseismiccodes.

简介：在thispaper，效果一僵硬在一辆僵硬圆柱的坦克在液体的地震反应上困惑被评估。A困惑是在地面刺激的效果上供应一种被动控制的一个环形的盘子。包含的液体被假定不可压缩，inviscid并且无旋的运动。估计地震反应，模式的重叠的方法被使用了。分析僵硬坦克反应，Laplaces方程被看作液体领域的管理方程，在时间和频率领域。边界元素方法(BEM)被采用在一辆圆柱的坦克评估液体的自然模式。获得这个目标，液体领域被划分成baffle划分的二上面、更低的部分。线性化包含的液体的免费表面的条件被考虑了的运动学、动态的边界。

简介：Deepstructureandmaterialpropertiesoffaultscanbeunderstoodbyobservingandsimulatingtheparticularphaseinafaultfracturezone.Thispaperreviewsthedevelopmentoffault-zoneseismicwavesintheseismologicaldomain.Thepresentresearchstatusoffault-zoneheadwaveandtrappedwavearesummarizedsystematically.Basedonrecentprogressinthisfield,thepaperdiscussestheprospectontheutilizationofseismicwaveinfaultstructureresearch.

简介：Thispaperpresentsin-situseismicperformancetestsofabridgebeforeitsdemolitionduetoaccumulatedscouringproblem.Thetestswereconductedonthreesinglecolumnsandonecaisson-typefoundation.Thethreesinglecolumnswere1.8mindiameter,reinforcedby30-D32longitudinalreinforcementsandlaterallyhoopedbyD16reinforcementswithspacingof20cm.Thecolumnheightis9.54m,10.59mand10.37mforColumnP2,P3,andP4,respectively.ColumnP2hadnoexposedfoundationandwassubjectedtopseudo-dynamictestswithpeakgroundaccelerationof0.32gfirst,followedbyonecyclicloadingtest.ColumnP3wasthebenchmarkspecimenwithexposedlengthof1.2monitsfoundation.TheexposedlengthforColumnP4wasexcavatedto4m,approximately1/3ofthefoundationlength,tostudytheeffectofthescouringproblemtothecolumnperformance.BothColumnP3andColumnP4weresubjectedtocyclicloadingtests.Basedonthetestresults,duetothelargedimensionofthecaissonfoundationandthewellgradedgravelsoiltypethatprovidedlargelateralresistance,theseismicperformanceamongthethreecolumnshadonlyminordifferences.LateralpushtestswerealsoconductedonthecaissonfoundationatColumnP5.Thecaissonwas12mlongandhadcircularcross-sectionswhosediameterswere5mintheupperportionand4minthelowerportion.AnanalyticalmodeltosimulatethetestresultswasdevelopedintheOpenSeesplatform.Theanalyticalmodelcomprisednonlinearflexuralelementsaswellasnonlinearsoilsprings.Theanalyticalresultscloselyfollowedtheexperimentaltestresults.Aparametricstudytopredictthebehaviorofthebridgecolumnwithdifferentgroundmotionsanddifferentlevelsofscouringonthefoundationarealsodiscussed.

简介：意外怪癖是为高大楼的地震设计的一个非标准的假设。考虑它要求地震抵抗的分析，它要求怪癖的结构的自然颤动的也耗时的计算或由为各怪癖的大小写使用一接近的相等的扭力的时刻发现一个静态的排水量答案。这研究建议一条其他的形式的反应光谱分析(MRSA)途径与意外怪癖计算地震回答。建议途径，把瑞利夸耀称为Projection-MRSA(RRP-MRSA)，基于MRSA和二策略被开发：获得怪人的近似模式的快计算的一个RRP方法组织的(a)；并且(b)装配怪人的集体矩阵的一条途径组织。RRP-MRSA的效率经由设计例子并且与标准MRSA(ST-MRSA)和一个近似方法相比被测试，即，相等的扭力的时刻混血儿MRSA(ETM-MRSA)。数字结果显示出那RRP-MRSA不仅几乎完成象ST-MRSA的一样的精确，并且比ETM-MRSA好一些，但是也是更节俭的。因此，RRP-MRSA能代替在地震设计的当前的意外怪癖计算。

简介：有在兴趣的一个区域的类似的特征的不同seismo构造的事件的鉴定和分类是在地震危险研究的最重要的题目之一。在这研究，线性、非线性的判别式分析被使用了在伊斯坦布尔的附近分类地震事件。数字速度震动图的垂直部件与发生在2001和2004之间的在1.8和3.0之间的大小(Md)被用于地震事件。二，时间依赖者参数，复杂性和S/P山峰振幅比率作为predictands被选择。线性，二次，diaglinear和diagquadratic判别式功能被调查。方法与的精确性一另外的调整二次的模型是96.6%，96.6%，95.5%，96.6%，和97.6%，分别地与为每个班的各种各样的分类的率。模型的表演与生气确认和替换错误被认为正当。尽管所有模型很好显著地表演了，调整二次的功能从179与就4个分类事件完成了最好的成功率，与复杂方法例如相比甚至更好，自我组织方法，k工具，在文学适用于一样的数据集的Gaussion混合模型。

简介：Mansehra的地点地震地位于活跃政体，在NW喜马拉雅山脉作为水晶的越过水坝落下的水地区和Hazara克什米尔Syntaxis知道，巴基斯坦。为这个地点的地震危险评价(SHA)被认为地震是来源地区，适当变细方程的选择，近的差错效果和最大的潜在的大小评价执行了。Mansehra戳，Oghi差错，Banna戳，Balakot砍地区，主要边界戳，Panjal戳，Jhelum差错和Muzaffarabad差错并且，推进到南方，Sanghargali，Nathiagali，和Thandiani戳是在Mansehra的50km半径以内的最批评的构造特征。用从1904～2007的可得到的仪器的地震学上的数据，SHA被执行了。在区域的另外的重新激活的批评构造特征被调查了。与到Poonch的从Balakot的120km的差错长度，在他们之中，Balakot-Bagh差错根据地质/结构/地震学上的数据被看作了最批评的构造特征。7.8用四种回归关系被分到Balakot-Bagh差错的最大的大小的潜在的地震。0.25g(为50年的exceedance的10%概率)和0.5g的山峰地面加速价值用概率、确定的途径在变细方程的帮助下被计算了。

简介：Asaresultofrapideconomicgrowthandurbanizationinthepasttwodecades,manytallbuildingshavebeenconstructedinChinaMainland,offeringresearchersandpractitionersanexcellentopportunityforresearchandpracticeinthefieldofstructuralengineering.ThispaperreviewsprogressbyresearchersthroughoutChinaMainlandontheseismicresearchoftallbuildings,focusingonthreemajortopicsthatimpacttheseismicperformanceoftallbuildings.Theseare:(1)newtypesofsteel-concretecompositestructuralmemberssuchassteel-concretecompositeshearwallsandcolumns,(2)earthquakeresilientshearwallstructuressuchasshearwallswithreplaceablestructuralcomponents,self-centeringshearwallsandrockingwalls,and(3)performance-basedseismicdesign,includingseismicperformanceindex,performancelevelanddesignmethod.Thepaperconcludesbypresentingfutureresearchneedsanddirectionsinthisfield.

简介：Inthispaper,accordingtotheFujianSeismicNetworkearthquakecatalogrecords,theTnowmethodandtheFourStationsContinuousLocationmethod(hereinaftercalledFSCL)putforwardbyJinXingareinspectedbyusingP-wavearrivalinformationofthefirstfourstationsofeachseismicevent.Resultsshowthatforearthquakeswithinthenetwork,bothmethodscanobtainsimilarlocationresultsandlocationdeviationsaresmallforthemajorityoftheevents.Forearthquakesoutsidethenetwork,thelocationdeviationmaybeamplifiedastheepicentraldistanceincreases,owingtotheseismicstationdistributionwhichspreadtowardthesideoftheepicenterandthesmallopeninganglebetweenseismicstationsusedforlocatingandepicenter.FortheFSCLmethod,theimpactsofthewavevelocityonthelocationresultsmaybesignificantforearthquakesoutsidethenetwork.Thus,selectingavelocitymodelwhichissimilartotheactualstructureofthewavevelocitywillcontributetoimprovinglocationresultsofearthquakes.TheFSCLmethodcanlocatemoreseismiceventsthantheTnowmethod.ItconcludesthattheTnowmethodmakesuseofmistakeinformationfromsomenon-triggeringstationsinearthquakecatalog,andsomeP-wavearrivalsarenotincludedintheearthquakecatalogduetodiscontinuousrecordsorunclearrecordsoftheseismicphase,whichinducesincorrectlocation.

简介：静电干扰是为处理深思考的大挑战地震数据。在这份报纸，几个不同静电干扰答案在处理深思考被实现了在华南和他们的相应结果的地震数据被比较了以便发现合适的静电干扰答案。任何一个静电干扰解决方案基于tomographic原则或把领域静电干扰的低频率的部件与相结合高周波折射静电干扰之一能为深思考提供合理静电干扰解决方案在有很崎岖的表面地形学的华南的地震数据，并且二个静电干扰解决方案能改正两长空间的波长和短的静电干扰异例。表面一致的剩余静电干扰修正能用作好赔偿到几种第一个静电干扰答案。合适的静电干扰答案能改进地震的节的质量和决定，特别为在最高的披风的莫霍的思考。

简介：为形式的闲差事分析过程，模特儿由Ghobarah等求婚了。(此后打电话给G模特儿，1999)被扩大了说明对充分的理由运动激动的结构的全球地震损坏的短暂更高的模式的贡献。建议模型身体上并且完美地衔接了G模型，最后的弄软模特儿由DiPasquale和Cakmak(1988)求婚了。相应于所有考虑颤动模式的形式的损坏索引被CQC规则或SRSS规则联合。增长动态分析(IDA)在三个例子RC框架上被执行验证建议模型，并且全面比较被执行。示范显示建议模型是安逸的实现并且在结构的损坏进化上在短暂颤动时期和模式反映转变的影响。与建议模型联系的一些限制也被探讨。进一步试验性的确认被需要以后改进模型。

简介：尽管有内在地盒子柱有利，为I横梁发现最好的选择到盒子柱连接是在为特殊时刻框架把盒子柱用作一个结构的成员的主要挑战。在这，纸，unreinforced连接的地震表演，削弱的连接和加强的连接通过一个全面试验性的节目被评估。地震比较被在每种配置估计力量，韧性和精力驱散制作。有几个连接的三完整的规模测试被执行。所有标本被在横梁形成塑料绞链受到周期的装载并且在失败以前，所有连接设法到达超过6.0%rad的无弹性的旋转。试验性、分析的结果证明有凸缘的加强的连接的地震性能并且砍盘子结果在到框列连接的横梁最有效。而且，连续性盘子的规范的压力分发表明在unreinforced连接的焊接破裂的可能性多于另外的标本。

简介：在地震刺激下面的液体结构相互作用是很复杂的，并且这样深水里的桥的损坏鉴定是关键技术保证安全服务。就增加的集体效果和液体结构相互作用效果而言基于非线性的莫里森方程，结构上的水动力学压力的效果被分析。一系列在水下的摇晃表格测试在空中并且在水里被进行。水动力学压力影响的动态特征被讨论，水动力学压力的分发也被分析。另外，结构的损坏通过自然频率和形式的弯曲的差别被区分，并且当时与测试结果相比。这研究的数字模拟和测试显示结构上的水动力学压力的效果不应该被忽视。损坏，损坏的地点和严厉的度的存在能通过结构频率和形式的弯曲的差别的变化被判定，这也被发现。

简介：Aone-dimensionalequivalentlinearmethod(EQL)iswidelyusedinestimatingseismicgroundresponse.Forthismethod,theshearmodulusanddampingratioofinelasticsoilaresupposedtobefrequencyindependent.However,historicalearthquakerecordsandlaboratorytestresultsindicatethatnonlinearsoilbehaviorisfrequencydependent.Severalfrequency-dependentequivalentlinearmethods(FDEQL)relatedtotheFourieramplitudeofshearstraintimehistoryhavebeendevelopedtotakeintoaccountthefrequency-dependentsoilbehavior.Furthermore,theshearstrainthresholdplaysanimportantroleinsoilbehavior.Forshearstrainsbelowtheelasticshearstrainthreshold,soilbehavesessentiallyasalinearelasticmaterial.Toconsidertheeffectofelastic-shear-strain-thresholdandfrequency-dependentsoilbehavioronwavepropagation,theshear-strain-threshold-andfrequency-dependentequivalentlinearmethod(TFDEQL)isproposed.AseriesofanalysesisimplementedforEQL,FDEQL,andTFDEQLmethods.Resultsshowthatelastic-shear-strain-thresholdandfrequency-dependentsoilbehaviorplaysagreatinfluenceonthecomputedsiteresponse,especiallyforthehighfrequencyband.Also,theeffectofelastic-strain-thresholdandfrequency-dependentsoilbehavioronthesiteresponseisanalyzedfromrelativelyweaktostronginputmotion,andresultsshowthattheeffectismorepronouncedasinputmotiongoesfromweaktostrong.

简介：Inresponsetothechallengeinherentinclassicalhigh-dimensionalmodelsofrandomgroundmotions,afamilyofsimulationmethodsfornonstationaryseismicgroundmotionswasdevelopedpreviouslythroughemployingawave-grouppropagationformulationwithphasespectrummodelbuiltuponthefrequencycomponents’starting-timeofphaseevolution.Thepresentpaperaimsatextendingtheformulationtothesimulationofnon-stationaryrandomseismicgroundmotions.ThegroundmotionrecordsassociatedwithN–ScomponentofNorthridgeEarthquakeatthetype-IIsiteareinvestigated.Thefrequencycomponents’starting-timeofphaseevolutionofisidentifiedfromthegroundmotionrecords,andisprovedtoadmittheGammadistributionthroughdatafitting.Numericalresultsindicatethatthesimulatedrandomgroundmotionfeatureszeromean,non-stationary,andnon-Gaussianbehaviors,andthephasespectrummodelwithonlyafewstarting-timesofphaseevolutioncouldcomeupwithasoundcontributiontothesimulation.更多还原

简介：Siteengineeringseismicsurveyprovidesbasicdataforseismiceffectanalysis.Asanimportantparameterofsoil,shear-wavevelocityisusuallyobtainedthroughwavevelocitytestinginborehole.Inthispaper,thepassivesourcesurface-wavemethodisintroducedintothesiteengineeringseismicsurveyandpracticallyappliedinanengineeringsiteofShijingshanDistrict.Byrecordingtheubiquitousweakvibrationontheearthsurface,extractthedispersioncurvefromthesurface-wavecomponentsusingtheSPACmethodandobtaintheshear-wavevelocitystructurefrominversion.Overthedepthof42munderground,ittotallyconsistsoffivelayerswithinterfacedepthof3.31,4.50,7.23,17.41,and42.00m;andshear-wavevelocityof144.0,198.3,339.4,744.2,and903.7m/s,respectively.Theinversionresultisusedtoevaluatesiteclassification,determinethemaximumshearmodulusofsoil,providebasisforfurtherseismichazardanalysisandsiteassessmentorsitezoning,etc.Theresultshowsthatthepassivesourcesurface-wavemethodisfeasibleinthesiteengineeringseismicsurveyandcanreplaceboreholes,shortensurveyperiod,andreduceengineeringcosttosomeextent.

简介：安达曼群岛Forearc盆(AFB)在配置是不对称的并且用∼6填满晚第三纪的km厚的堆积到最近的沉积(在双向旅行时间的∼4s：TWT)与不同带状配列。它显示出与1:30的一个海床坡度的近东方结束的直到∼3km(在TWT的0.8s)的渐渐的变瘦。Outerarc的厚使变形的沉积∼2s(TWT)与强烈指责被联系，偶尔的合拢由最近的tectonics引起了。在upwarped以内的一系列差错的开发渐新世顶到的沉积的列最近与旋转差错块被观察。这些特征是最近的火的侵入的表明，并且揭示温和N-S有压缩性的政体的存在。它AFB上的效果导致了进一步沉积高举，它现在能被看作不可见的银行。支持我们的地震解释的前面的严肃建模表明它从莫霍(∼9km深度)与火的侵入被联系，并且也建议那个大陆人外壳位于AFB下面。象在在在海床下面的0.6s的深度的Outerarc和Forearc盆的中新世的沉积的特征一样的强壮的底部模仿反射镜(BSR)在AFB建议煤气的水合物的推断的可能的出现。