新型雙壁多釘連接裝配式鋼保溫筒倉力學(xué)性能研究.pdf

1、東南大學(xué)碩士學(xué)位論文新型雙壁多釘連接裝配式鋼保溫筒倉力學(xué)性能研究姓名：賴海斌申請學(xué)位級別：碩士專業(yè)：土木工程；結(jié)構(gòu)工程指導(dǎo)教師：尹凌峰2012-05-29東南大學(xué)碩士學(xué)位論文ResearchOnMechanicalPropertiesofANewlyDouble--WallFabricatedSteelInsulationSiloWithMultipleBoltedJointsAbstractSteelsiloiswidelyusedi

2、neveryfieldofindustrialandagriculturalproductionandplaysasignificantroleinourcountry’sgrainstorageThepoorthermalinsulationpropertyofgrainsteelsilowhichiscurrentlyusednotonlybringgratedi伍cultiestograinstoragebutalsoi11cre

3、asethecostandconsumptionofgrainstorageTheresearchobectofthispaperisanewlydoublewallfabricatedsteelinsulationsilowithmultipleboltedioints，whichcallprovideefficientandreasonablemechanicalbehaviourandrather900dthermalinsula

4、tionpropertiesFirst,basedonadoublewallsteelsiloexperiment,theconnectionmodeofboltediointsisdeeplyresearchedandtherefinementfiniteelementroodalofthedouble—wallsiloisobtainedSecondmechanicalanalysisofadoublewallsiloOf1000t

5、onundersiloloadingeccentricload，windload，seismicactionaredonethestressmechanismofthesiloisstudieddetailwhichmainlyincludestheforcetransferringpathoftheinnerandoutsidewalls，thestressanddisplacementdistributionandthestress

6、pathoftheinnerandoutsidewallThirdnonlinearcarryingcapacityofthesiloisthoroughlystudiedwhichconsidertheinfluenceofinitialgeometricimperfectiondistributedonthebucklingmodaloffirsteigenvalueandtheinfluenceofimperfectionresu

7、ltfromthewindloadtheultimatecapacityandfailuremechanismofthesiloisobtainedFinallythefunctionoftheinnerringbeamandtheoutsideringbeamisrevealed，andresentfuloptimizationdesignofthewallthicknessandthearrangementoftheboltsacc

8、ordingtothestresscharacteristicsisachievedBytheseriesresearchesaboveseveralmainconclusionsareobtainedasfollows：(1)ThenewlydoublewallsteelinsulationsilowithmultipleboltiointsisareasonablestresssystemTheinnerandoutsidewall

9、scarlbearstructureloadtogetherwhileeachofthememphasizesrespectivelywithclearforoetransferringpath，thewallscanworktogetherwell(2)Theboltconnectionoftheinnerandoutsidewallsisofgrateimportancetothemechanicalbehaviorofthestr

10、uctureThe“米”modaleonsistofshortbeamscallsimulatetheboltconnectioneffectivelyandreasonably(3)Horizontalloadresultfromthestoredgrainismainlyborebytheinnerwallandtheverticalfrictionproducedbetweengrainandwallisborebythewhol

11、esystemconsistoftheinnerandoutsidewallsbuttheoutsidewallplaysamoreimportantroleThestructure‘ssensitivitytoeccentricIoadisacceptable(4)Theinnerandoutsidewallscallworktogetherwellunderwindloadandseismicaction，andtheinnerwa

12、llcallbearmostofthehorizontalload(5)Thecauseofthesilo’sfailureismaterialdamageinpartialwallandthebrokenappearsinthemiddleandlowerofthestructurethedeformationofthebrokenpartlikeadrumandthesiloisnotanimperfectionsensitives

13、tructure伯)Theinnerandoutsidewallcanbetterthesilo’smechanicalbehaviorandtheoptimizationdesignofthewallthicknessandthearrangementoftheboltcanimproveeconomicbenefitKeywords：Steelinsulationsilo，double-wall，multipleboltedjoin

14、ts；finiteelementsimulation；nonlinearanalysis；initialimperfection；Orhisresearchissupportedbynationalnaturalsciencefoundetion51008067,thesixpersonnelpeaksupportplanofJiangSuprovince2010-JZ-007，urbanandruralhosingandthemini