英语文献报告.pptx
- 文档编号:2705796
- 上传时间:2022-11-08
- 格式:PPTX
- 页数:11
- 大小:119.90KB
英语文献报告.pptx
《英语文献报告.pptx》由会员分享,可在线阅读,更多相关《英语文献报告.pptx(11页珍藏版)》请在冰豆网上搜索。
专业英语作业汇报专业英语作业汇报Evaluationofundrainedfailureenvelopesofcaissonfoundationsundercombinedloading作者作者MouraMehravara,OuahidHarirecheb,AsaadFaramarzica.WolfsonSchoolofMechanicalandManufacturingEngineering,LoughboroughUniversity杂志杂志AppliedOceanResearch年月年月2016页码页码129-137GeneralbackgroundAsuctioncaissonconsistsofathin-walledupturnedbucketofcylindricalshapemadefromsteel.Thistypeoffoundationhasproventobeefficientandversatileasasupportforoffshorestructuresandappearstobeaveryattractiveoptionforfutureuseinoffshorewindturbines.Thethincaissonwallfacilitatesinstallationwhenapressuredifferentialisinducedbysuctiononthecaissonlid,whichpushesthecaissontopenetrateintotheseabed.Thisisachievedbypumpingoutthewatertrappedinthecaissoncavityafterinitialpenetrationunderself-weight.Theskirtcanimprovethefoundationbearingcapacitybytrappingthesoilbetweenthemduringundrainedloading.LiteraturereviewandGapAnumberofstudieshavebeenconductedontheinvestigationofbearingcapacitiesofcaissonfoundations.However,inthemostoftheformerstudiesthefoundationwaseitheranalysedasaskirtedstripfoundationusingfiniteelementanalyses(FEA)andupperboundsolutionsorasasurfacecircularfoundationusingthree-dimensionalFEAwithoutconsideringtheskirtlengthinthesimulation.Ontheotherhand,offshorefoundationsarethree-dimensionalandembedded.Theskirtlengthhasaconsiderableimpactontheirbearingcapacities.Onlyfewstudieswereperformedbyconsideringthecaissonfoundationusingthree-dimensionalmodel.Mostoftheseanalysesdidnotcomprehensivelycoveredawiderangeofpracticalembedmentratiosorinvestigateallvertical,horizontalandmomentbearingcapacities.AsummaryofpreviousstudiesonundrainedbearingcapacitiesandfailureenvelopesofshallowfoundationsarepresentedinTable1.gapObjectiveInthepresentstudythemainobjectiveistoperformthree-dimensional(3D)undrainednumericalsimulationstopredictthebearingcapacityofcaissonfoundationsunderuniaxialandcombinedloadingconditions.ThepresentstudyrefersmainlytotheworkdonebyGourvernec,BransbyandRandolph,whichareessentiallyplanestrainanalyses.Ithasbeenjustifiedthatwithinsuchcontext,theassumptionoffullbondingbetweenthecaissonandsurroundingsoilisplausible(especiallythatsuctiondevelopmentattheinterfaceinundrainedconditionpreventsseparation).Hence,theworkperformedinthecurrentpaperhasbeenlimitedtoasimilarcontext,takingadvantageofefficientnumericalcomputationsandreasonablecomputationaltime.Anextensionofthepresentworkbyimplementinginterfaceswouldshedmorelightontheaccuracyofbothplanestrainand3Dmodels,butsuchanextensionisbeyondthescopeofthepresentpaper.objectiveObjectiveInthispaper,aseriesofthree-dimensionalfiniteelementanalysesusingABAQUSareperformedtoinvestigatetheeffectoftheembedmentdepthonthebearingcapacityofshallowfoundationsinhomogenousundrainedsoil.Differentaspectratiosofcaissonfoundation“L/D=0,0.25,0.5,0.75,1”,whereListheembedmentlengthandDisthecaissondiameterareconsidered.Uniaxialvertical(V),horizontal(H)andmoment(M)bearingcapacitiesareinvestigatedandpresentedasaseriesofequationstoestimatetheuniaxialultimatevertical,momentandmaximumhorizontalbearingcapacityfactorsofcaissonfoundations.Finally,thecapacitiesofcaissonfoundationsundercombinedVH,VMloadspacearestudiedandexpressedbyfailureenvelopes.IntroductionAsuctioncaissonconsistsofathin-walledupturnedbucketofcylindricalshapemadefromsteel.Thistypeoffoundationhasproventobeefficientandversatileasasupportforoffshorestructuresandappearstobeaveryattractiveoptionforfutureuseinoffshorewindturbines.Thethincaissonwallfacilitatesinstallationwhenapressuredifferentialisinducedbysuctiononthecaissonlid,whichpushesthecaissontopenetrateintotheseabed.Thisisachievedbypumpingoutthewatertrappedinthecaissoncavityafterinitialpenetrationunderself-weight.Theskirtcanimprovethefoundationbearingcapacitybytrappingthesoilbetweenthemduringundrainedloading.Anumberofstudieshavebeenconductedontheinvestigationofbearingcapacitiesofcaissonfoundations.However,inthemostoftheformerstudiesthefoundationwaseitheranalysedasaskirtedstripfoundationusingfiniteelementanalyses(FEA)andupperboundsolutionsorasasurfacecircularfoundationusingthree-dimensionalFEAwithoutconsideringtheskirtlengthinthesimulation.Ontheotherhand,offshorefoundationsarethree-dimensionalandembedded.Theskirtlengthhasaconsiderableimpactontheirbearingcapacities.Onlyfewstudieswereperformedbyconsideringthecaissonfoundationusingthree-dimensionalmodel.Mostofthesean
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- 英语 文献 报告
![提示](https://static.bdocx.com/images/bang_tan.gif)