基于元胞自动机的地震触发崩塌滑坡分布规律.docx

基于元胞自动机的地震触发崩塌滑坡分布规律摘要：为了从物理角度对地震触发崩塌滑坡分布规律的机理进行诠释通过汶川震区典型路段考察和遥感资料解译发现：位于IX度地震烈度区崩塌滑坡方量与出现频率之间存在良好的负幂律关系；在X度区崩塌滑坡面积与出现频率的关系仍可用负幂律描述；在XI度区这一关系转为对数正态分布.元胞自动机模拟表明：以扰动值递增模拟地震强度的增大沙堆模型的动力特性也经历了幂律―幂律弱化―对数正态分布的演变过程从而在自组织临界性的概念框架下证明了上述不同烈度区地震触发崩塌滑坡分布概型的演变规律具有普适性为汶川地震崩塌滑坡编目以及高烈度地震山区灾势预估等提供了科学依据.关键词：汶川地震；崩塌滑坡；分布规律；元胞自动机；自组织临界性中图分类号：P642.22文献标志码：ADistributionLawofLandslidesTriggeredbyEarthquakeBasedonCellularAutomataHUANGYidan1YAOLingkan123GUOChenwen1（1.SchoolofCivilEngineeringSouthwestJiaotongUniversityChengdu610031China；2.MOEKeyLaboratoryofHighSpeedRailwayEngineeringChengdu610031China；3.RoadandRailwayEngineeringResearchInstituteSichuanKeyLaboratoryofSeismicEngineeringandTechnologyChengdu610031China）Abstract：InordertointerpretthemechanismofdistributionoflandslidestriggeredbyearthquakefromaphysicalpointofviewtypicalsectionsinearthquakezonesintheWenchuanearthquakewereinvestigatedandrelatedremotesensingdatawasinterpreted.TheresultshowsthatthereexistsanegativepowerlawrelationshipbetweenthevolumeandnumberoflandslidesinIXseismicintensityzoneoftheWenchuanearthquakeandthesameistruebetweentheareaandfrequencyoflandslidesinXintensityseismiczone.HowevertherelationshipchangesintoalognormaldistributioninXIseismicintensityzone.Inadditioncellularautomatawasusedtosimulatelandslides.Thecellularautomatonsimulationrevealsthatwiththechangeofdisturbanceintensitythedynamicalmechanismofsandpilemodelisfromastrongpowerlawtoaweakpowerlawthentoalognormaldistribution.Undertheconceptualframeworkofselforganizedcriticalityitisprovedthatthedistributionmodeloflandslidesindifferentseismicintensityzoneshasauniversallaw.TheresearchresultsmaynotonlybeusedtoguideinventoryoflandslidestriggeredbytheWenchuanearthquakebutalsoprovideascientifi