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时间:2020-04-21
《Boom Clay蠕变特性研究-论文.pdf》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、第32卷第lO期岩石力学与工程学报V_o1-32N0.102013年10月ChineseJournalofRockMechanicsandEngineeringOct.,2013BoomClay蠕变特性研究陈卫忠~,袁克阔,于洪丹,赵武胜,龚哲,李香玲。(1.山东大学岩土与结构工程研究中心,山东济南250061;2.中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室湖北武汉430071;3.比利时国家核能研究中心,比利时摩尔2400)摘要:BoomClay为比利时第三纪细密黏土沉积物,其力学性质十分复杂
2、,尤其是其显著的蠕变特性更需进行广泛的试验和深入的理论研究。通过室内固结和三轴蠕变试验,研究不同应力水平下的蠕变特性;建立以不可恢复应变为变量的不显含时间的分离型屈服面蠕变本构模型,避免了传统显含时间项的蠕变模型在土体经历加、卸载过程等复杂工况的实际计算中,具体蠕变时间确定的难题。将所建新型蠕变模型在ABAQUS软件中实现二次开发,并通过不同蠕变参数下的基本性能检验和蠕变试验的模拟,验证了所建模型的正确性和所编程序的可靠性。关键词:岩石力学;BoomClay;泥岩;黏土岩;蠕变;本构模型中图分类号:Tu45文
3、献标识码:A文章编号:1000—6915(2013)10—198卜10CREEPBEHAVIoRoFBooMCLAYCHENWeizhong1一YUANKekuo,YUHongdan,ZHAOWusheng,GONGZhe2LIXiangling3,,r1.GeotechnicalandStructuralEngineeringResearchCenter,ShandongUniversity,Jinan,Shandong250061,China;2.StateKeyLaboratoryofGeomechan
4、icsandGeotechnicalEngineering,InstituteofRockandSoilMechanics,ChineseAcademyofSciences,Wuhan,Hubei430071,China:3.Euridice,SCK·CEN,BelgianNuclearResearchCentre,Mol2400,Belgium1Abstraet:TheBoomClayiSakindoftertiaryuniformandfineclaysediment.Becauseofitscompli
5、catedmechanica1characteristics,especiallyevidentcreepcharacteristic,aseriesoflaboratorytests,includingone.dimensionalcompressioncreeptests(CCT)andtriaxialcreeptests(TCT)havebeenconducted;andcreepdeformationcharacteristicsofBoomClayareresearchedunderdifferen
6、tpressuresanddifferenttypesofexperiments.AseparatedyieldsurfacecreepconstitutivemodelimplicittimeinformulawithirreversiblestrainvariableiSestablishedaftertheoreticalanalysis.Itcanavoidthedificultyofdeterminingthecreeptimeswhenresolvingtheactualcalculationun
7、dercomplicatedworkingconditionbythetraditionalmodelwithexplicittime.Finally,thenumericalimplementationofthenewcreepconstitutivemodeliSimplemented;andthecreeDtestonBelgianBoomclayiSsimulated.TheresultsshowthatthenewconstitutivemodelandtheI『]MALTsubroutineinA
8、BAQUShavegoodcalculationaccuracyandgoodstability,whichcouldefectivelydepictthenonlinearcreepcharacteristicofBelgianBoomClay.Kevwords:rockmechanics;BoomClay;mudstone:clayrock;creep;constitutivemodel三纪细密
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