简介：Inthispaper,astudyoftheprincipalcharacteristicsofthegrounddeformationdisastersinthecityofTianjincausedbytheTangshanearthquakeisbasedontheresultsfromtherecentremeasurementsofthegeodeticcontrollingnetworkofTianjinandfromon-siteinvestigationsaftertheearthquake.TheseresultsshowthatonlythegrounddeformationintheNingheandHanguareasneartheepicenterreflectdirectlytheco-seismiccrustalstress,whiletheseriousgrounddeformationandtheengineeringearthquakedamagesintheurbandistrictsofTianjinarecontrolledtoagreatextentbythelocalengineeringgeologicalstructures,showingakindofsecondarydisaster.Severalsuggestionsarealsoproposedinthepaperconcerningthecounter-measuresforreducingtheearthquakedamageinbigcities.

简介：Accordingtotheresultsofestimationofthemaximumpotentialearthquakeintheprojectof"TheActiveFaultDetectionandSeismicRiskEvaluation(PhaseII)ofZhengzhouCity",theneareast-westtrendingLaoyachenfaultandShangjiefaultaredevelopedintheurbanarea.TheLaoyachenfaultwasnotactiveintheQuaternary,buttheShangjiefaultmayhavethepotentialofgeneratingM5.0~5.5earthquakes.Inordertogettheprobabilityofoccurrenceofmaximumpotentialearthquakes,wedelineatethestatisticalareasandthepotentialsourceareasandcalculatetheseismicityparametersandthespacedistributionfunctions.OurstudyshowsthattheprobabilityofoccurrenceofanearthquakewithM≥5.0onthefaultsinZhengzhoucityis6%inthenext50yearsand11%inthenext100years.

简介：在这研究，充分的理由运动记录(SGMR)选择基于希腊语字母的第七字()作为一光谱形状指示物是适用于钢braced框架结构被调查了。为目标Epsilon的定义的概率的地震危险崩溃分析()并且目标希腊语字母的第七字()在不同危险层次的价值被介绍，适当地考虑选择了SGMR。脆弱曲线为相应于在计划有重要不规则的典型的钢braced框架的三个代表性的模型的不同限制状态被开发，借助于一个加权的损坏索引。结果显示出那光谱形状指示物在预言的中部的结构的能力上有重要效果，并且另外参数比与适当价值寻找记录是损坏的一个更柔韧的预言者。