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Due to the significant differences in the intensity characteristics of near-fault ground motion in different directions, taking typical near-fault seismic records as an example, three ground motion intensity parameters were selected to compare the variability of ground motion intensity in various directions. Based on OpenSees finite element software, the difference of seismic response of slopes under different directions of seismic was analyzed. Considering the strain softening characteristics of soil, the influence of directional effects of seismic motion on the seismic stability of slopes was explored. The results show that the PGA variability of peak acceleration in different directions reaches 62.5%. The displacement response of the slope top in the direction of the maximum PGA under seismic action increases by 20.5% and 86.5% respectively compared to the two components recorded in the measured horizontal seismic motion. The variation range of slope safety factor under different directions of seismic action is 0.93-1.15. Ignoring the seismic direction may overestimate the seismic capacity of the slope and increase the risk of seismic instability. The research results can provide reference for slope seismic design and disaster prevention.

, authors=Kai YANG, authorsList=Kai YANG, authorCompany=null, correspAuthors=null, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1322560023247569413, articleId=1322560022782001667, tenantId=1146029695717560320, journalId=1225396423026438145, language=CN, title=近断层地震动方向性对边坡地震响应与抗震稳定性的影响研究, columnId=1226462295417598973, journalTitle=矿业研究与开发, columnName=矿山安全与环保, runingTitle=null, highlight=null, articleAbstract=

由于近断层地震动强度特性在不同方向上存在显著差异，以典型近断层地震记录为例，选用三种地震动强度参数比较了地震动强度在各个方向上的变异性；基于OpenSees有限元软件分析了不同方向地震作用下的边坡地震响应差异；考虑土体应变软化特性，探讨了地震动方向性效应对边坡抗震稳定性的影响。研究结果表明：不同方向的峰值加速度PGA变异性达到62.5%；PGA最大值所在方向地震作用下的边坡坡顶位移响应相较于实测水平地震动记录的两条分量分别增大了20.5%和86.5%；不同方向地震作用下的边坡安全系数的变化范围为0.93~1.15，忽略地震方向性可能会高估边坡的抗震能力，增加地震失稳风险。研究成果可为边坡抗震设计及灾害防治提供参考。

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杨凯（1982—），男，山东郓城人，工程师，主要从事岩土地震工程与地质灾害防控方面的研究。E-mail:xc202426@163.com

"}, bioImg=null, bioContent=

杨凯（1982—），男，山东郓城人，工程师，主要从事岩土地震工程与地质灾害防控方面的研究。E-mail:xc202426@163.com

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