随机主余震作用下AP1000核电厂可靠度研究

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关键词：AP1OOO核电厂；随机主余震；直接概率积分法；动力响应；可靠度 中图分类号：TU312.3 文献标志码：A DOI：10.16385/j.cnki.issn.1004-4523.202309029

Reliability study of AP1ooo nuclear power plant under stochasic mainaftershock

GAO Jiahong1，²，PANG Rui 1，2 ，ZAIDezhi 1，2 ，XUBin1，2 （1.School of Infrastructure Engineering，Dalian University of Technology，Dalian l16o24，China; 2.NationalKeyLaboratoryofCoastalandOffshoreEngineering，Dalian UniversityofTechnology，Dalian116O24，China）

Abstract：Inpractice，earthquakes typicallinvolveamainshockfollowedbyaseriesofftershocks，and theiroccurrenceshighly unpredictable.The mainshock damages thestructure，andtheaftershocks worsentheresponseanddamageofthestructure.However，nostudieshaveinvestigatedtheefectsofstochasticseismicsequencesonAPooOnuclearpowerplants.Thispaperproposes ananalyticalframeworkforstudying thedynamicresponseandreliabilityofAPloo nuclearpowerplants understochasticmainaf tershocks.Stochastic mainaftershock sequencesare generated usingthephysicalstochasticfunction modelofgroundmotios，nar row-band harmonic group superposition method，and Copula function.Thedynamic responseof the APloo nuclearpowerplant is analyzed by using ABAQUS software.The direct probabiltyintegration method（DPIM） is used toobtain the probabilitydensity functionofthemaximumdisplacementresponseinthehorzontaldirectionoftesheldedbulding，andtsdynamicrelabiltyiscal culated.Theresultsshowthattheaccelerationandrelativedisplacementof thetopof theshielded buildingandthestelcontainmentvesselhaveincreased tovaryingdegreesaftertheaftershock，comparedwithexperiencingthemainshockonly.Additionally， thedamageareabetwen thewatertanksandthevents hasexpanded.Theaftershockscouldcause furtherdamagetothenuclear powerplant.Thedynamicresponseofnuclearpowerplants exhibitsahighdegreeofrandomnessduetothestochastic ground mo tions.Aftershockscan reduce the reliabilityofnuclear power plants to varying degrees under diferent thresholds.

Keywords：APlO nuclearpowerplants；stochasticmainaftershocks；directprobabilty integration methool（DPIM）；dynamic response;reliability

核能作为经济、清洁、高效的能源，相比于传统煤炭发电能够大大减少污染物的排放。（剩余14331字）