脉冲型地震动下埋地管道易损性及巨震风险分析

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关键词：结构抗震；埋地管道；易损性分析；增量动力分析；脉冲型地震动；巨震 中图分类号：TU457 文献标志码：A DOI：10.16385/j.cnki.issn.1004-4523.202307004

Abstract：The fth generation“seismic ground motionparameters zonation mapof China”（GB 18306—2Ol5），which was pro mulgatedandimplementedinChina，introducedthevaryrareearthquakeefectforthefrstime.However，thcurrentseismicde signspecificationstilladoptthe thre-leveldefenseprinciple.Theseismicdesignforvaryareearthquakehasbecomeoneof theur gentissues thatneedtobeaddressed instructural seismicdesign.Basedontheidentificationmethodofcontinuous wavelettrans form，this paperselects12 pulse-likeground motionsand12non-pulseseismic motionsrecordedintheTurkey mega earthquakeon February6，O23.Theincrementaldynamicanalysis（IDA）isconductedoncontinuous pipelinesandductileironpipelines toevaluatetheirseismicfragilty.Thefragilityanalysisresultsarecomparedwiththefailureprobabilityobtainedbyempiricalstatitical method.Theresultsshowthattheefectofpulse-likegroundmotionssignificantly increases theprobabilityofseriousstructural damage forburiedpipelines withdiferentforms.Compared withcontinuouspipelines，ductileironpipelinesaremorepronetodamageunderground motions，andare moresensitivetothepulse-like ground motion.Theempiricalstatisticalresultsbasedonactual seismicdamagedataareslightlylowerthanthefailureprobabilityofpipelinesundernon-pulseearthquakemotion，butsignificantly underestimate thedamageofburiedpipelinesunderpulseearthquake motion.Inthispaper，thefailureprobabilityofdiferenttypes of buriedpipelinesunderpulse-likeseismicmotionsisgiven，andtheresearchresultscanprovideastrongtheoreticalbasisforthe risk assessment and seismic design of buried pipelines under very rare and pulse-like ground motions.

Keywords：structural seismicresistance；buriedpipeline；fragilityanalysis；incremental dynamicanalysis；pulse-likeground motion；very rare earthquake

埋地管道是城市生命线工程的重要组成部分，埋地管道的抗震分析对城市安全以及居民生命财产安全有重要意义[1]。（剩余20357字）