破碎带对高山峡谷复合场地中Rayleigh波散射特性的影响分析

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关键词：高山峡谷；破碎带；Rayleigh波；场地效应；比例边界有限元 图分类号：TU435 文献标志码：A DOI：10.16385/j.cnki.issn.1004-4523.202404038

Abstract：Inthispaper，etiedomainanalysisofteectofrupturezonsonRayleighwaveresponseinalpinevallyompositeei isdevelopedbasedonthescaledboundaryfiniteelementmethod（SBFEM）.Thehalf-infiniteregionofthealpinevaleycompositesite contaninguptureosiscopoditarfelditegiodfeldifiiteiosedepriplfstrcec interactions，thenear-fieldfiniteregionisdiscretizedbyusingtheuadtreemeshecompositiontechique，andtheradiatioboundary conditionsatinfinityaresimulatedbytedisplacementunit-impuseresponsematrix.Theinputofseismicwavesistransforedintothe tractionforceactingonttefacebetweenteaandfarfiels，andteumecalmodellngofaighavescateigbposite sitofalpiecanyocontaigfractuesisstablishd.Teftofupturenesotesesmicamplificatioeectintealpiley compositeterinisfurthdscussd whilestudingthesinglesitetothesesmicRayleighsatringmechansm.Teresultssowthatthe scateringmechansmsofseismicRayleighwavesarediferentformoutains，canyonsandruptureZones；theadversecombinatioofalpine canyon topography and rupture zones amplifies the seismic waves more significantly.

Keywords：alpine valley;rupturezone;Rayleigh wave;site effects;scaled boundary finite element method

局部地质条件和不规则地形对地震波的传播具有重要的影响，会导致地面震动的强度和频率成分发生重大的空间变化。（剩余18494字）