简介：Accordingtotheresultsofsiteseismichazardanalysisaccomplishedinthepastdecades,96site-relateddesignspectraareselectedassamplesinthisstudy.Theresultshowsthatthevalueofthecornerperiod(Tg)ofthedesignspectruminGBJ11-89(ChinaSeismicBuildingCode,issuedin1989)islowerthanthevalueobtainedbysiteseismichazardanalysis.ThesamesituationexistswhenwecomparethedesignspectraoftheCodestothespectraaccordingtotheearthquakerecords.Thevalueincurrentseismicdesigncode,GBJ50011-2001issuedin2001,isgreaterthanthatinGBJ11-89,butstilllessthanthevalueobtainedbysiteseismichazardanalysis.Ifweacceptthevaluegotbysiteseismichazardanalysis,wehaveasuspicionthat2/3ofbuildingsbuiltaccordingtoGBJ11-89willnotbesafewhenanearthquakewith2%probabilityofexceedancein50yearsoccurs.

简介：ＳｔａｔｉｓｔｉｃａｌｔｅｓｔｓｏｆｒｅｃｅｎｔｐｌａｔｅｔｅｃｔｏｎｉｃｕｎｉｔｓｂｙｕｓｉｎｇｇｅｏｄｅｔｉｃｄａｔａＺＨＩＰＩＮＧＬＵ１）（吕志平）ＸＩＡＮＢＩＮＧＷＵ２）（吴显兵）ＣＨＡＯＺＨＡＮＧ１）（张超）１）ＺｈｅｎｇｚｈｏｕＩｎ...

简介：AstatisticalanalysisoftectonicenvironmentforM≥6.0strongearthquakesinChina'scontinentsincethebeginningofrecordedhistoryisperformedbasedonthedataofactivefaultsstudiedduringlast10yearsandresultofcompilationofthefourthversionoftheMapofSeismicRegionalizationofChinaforEarthquakeProtection.Tectonictypesofseismicsourcesofstrongearthquakesinallseismicregionsandthemovementmodesofseismogenicstructuresarediscussed.Meanwhile,ananalysisoflengthsofsurfacerupturezonesproducedbyalltypesofearthquakes,orientationsoflongaxesofmeizoseismalareas,regionaltectonicstressfieldsinseismicsourceregionsforstrongearthquakes,geophysicalfields(gravityanomaly,highconductivitylayeranomaly,andterrestrialheatflowdensity),andrecentverticalcrustaldeformationfieldshavebeencarriedout.

简介：Ａｐｐｌｉｃａｔｉｏｎｏｆｍｅｃｈａｎｉｃａｌａｎｄｓｔａｔｉｓｔｉｃａｌｍｏｄｅｌｓｔｏｔｈｅｓｔｕｄｙｏｆｓｅｉｓｍｉｃｉｔｙｏｆｓｙｎ－ｔｈｅｔｉｃｅａｒｔｈｑｕａｋｅｓａｎｄｔｈｅｐｒｅｄｉｃｔｉｏｎｏｆｎａｔｕｒａｌｏｎｅｓＹＡＯ－ＬＩＮＳ...

简介：Inordertounifythetimeandthespaceattributesintotemporal-spatialdistance,thetemporal-spatialproportionalcoefficientfTSisproposedinthispaper.Inaccordancewiththenewdistanceconcept,thetemporal-spatialcorrelativitywithintemporaldoubletsofstrongearthquakesinNorthChinaanditsvicinitysinceAD1500hasbeenanalyzed.ThecomputationresultsindicatethatdoubletsofstrongearthquakecanbedividedintotwogroupswhenfTSisendowedwith10km/ainthenewdistanceformula.Thetemporal-spatialdistancebetweentwopointsofdoubletgenerallycannotexceed140kmwhentwostrongquakesindoublethavesomecausativerelation.Andthosedoubletswithtemporal-spatialdistanceexceeding280kmareprobablyindependentseismiceventsindoublets.Thischaractercanbethereferencetothemigrationlawsummarizationandtrendprediction.

简介：关于记录M≥的地震5.0那从1970～发生在Qinghai-Xizang(西藏)块的中间的北部分2003，在这研究，我们通过4个参数在主要震动前描述弱震和改进和他们的地震活动的异常静止的时间、空间的集中化特征，它基本上没被相关：地震时间集中化度参数C_t，地震空间集中化度参数C_d，η值和弱震频率等等。根据计算结果，在有M≥的地震前，5.0发生在Qinghai-Xizang(西藏)块的中间的北部分，这被看见了，弱震oftenshows的频率上升并且落下，他们的力量证明有时空的明显的改进和集中化分发是明显的。