侧向支承作用下简支钢梁整体稳定性研究

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1、۽ӱഡ࠹GrainDistributionTechnologyҧཟᆦӵቔႨ༯ࡥᆦۑਃᆜุ໗קྟ࿹࣮ਾཬ஡đഽ༵ၿčᇏਁ۽ӱ॓࠯čᆢᇜĎႵཋ܄ඳđᆢᇜ450053ĎᅋေğЧ໓۴༵൮b࣮࿹๤༢ਔྛࣉିྟק໗ุᆜൈӵᆦཟҧਆႵჸၴ࿢൳ਃۑྙ۽ᆦࡥؓऌିਈק໗ุᆜਃۑ༯Ⴈቔ྘োᄛހ๝҂ᇕਔ๷đটԛ౼׿ֆ؍ਃᇏϜđ৘ჰمਢࢸຕइĠఃՑࢺകਔ/FUIFSDPUބ5SBIBJSࡹၰॉ੮ਃ؍ཌྷ޺ჿඏིႋ࠹ෘٚمčࡥӫo/5مpĎbҐႨ"/4:4Ⴕཋჭٳ༅ೈࡱđ۴ਔෘ࠹܋đ߄э྘োᄛހaൔྙ૫ࢩaࡱ่ӵᆦཟҧః੮ॉđਃۑᆦࡥNູॴሹؓؓ༅ٳݖ๙đ༅ٳбؓਔྛࣉᄛހ

2、ࢸਢק໗ุᆜෘ࠹مٚᇕؓުಖb༅ٳ౷౹ᆴᆘหਔྛࣉఃؓđਃۑб௟ࡎਔਆᇕ৘ંٚم࠹ෘࣚބൌႨྟbቋު۴ऌႵཋჭٳ༅ࢲݔđ୅ކਔડॴनހᄛቔႨaॴᇏࠢᇏހᄛቔႨaᆦӵԩࠢᇏހᄛቔႨ༯ۑਃིຕइ༢ඔ࠹ෘ܄ൔbܱ࡯ՍğҧཟᆦӵĠหᆘᆴ౹౷ٳ݂߭Ġඔ༢इຕིĠ༅ٳ༅StudyonOverallStabilityofSimplysupportedI-sectionSteelBeamWithTwoLateralBracingforitsCompressionFlangeLiuXiaopeiđShiXianyinčCOFCOEngineeringċTechnologyč

3、ZhengzhouĎCo.đLtd.đZhengzhou450053đChinaĎAbstractğThethesisđwhichhasasystematicstudyontheoverallstabilityofdualaxlesymmetricI-sectionbeamwithtwolateralbracingforitscompressionflange.Firstđinaccordancewiththeenergymethodtheoryđthethesisđtakingmiddlesectionintoconsiderationindependen

4、tlyđdeducesthecriticalmomentofgirdernsoverallstabilityunderthreedifferentloadtypes.NextđthethesisintroducesthecalculationmethodwhichconsidersmutualconstrainteffectofbeamsectionsproposedbyNethercotandTrahairčhereinafterreferredtoasoNTmethodpĎđThethesisđmainlyadoptingANSYSfiniteeleme

5、ntanalysissoftwaređcarriesouteigenvaluebucklinganalysison144girdersconsideringthelateralbracingconditionsandchangesofcrosssectionshapeandtypeofsimplysupportedsteelbeamwithtotalspan15m.carriesoutcomparativeanalysisonthecriticalloadofoverallstabilitycalculatedbythethreemethodsđthroug

6、hwhichtheauthorevaluatestheaccuracyandpracticalapplicabilityofthetwotheoreticalapproachesđThethesisđfitstheformulaforequivalentmomentcoefficientofgirdersunderdifferentloadtypesđi.e.fullcrossuniformlydistributedloadfunctionđmidspanconcentratedloadandsupportingplaceconcentratedload.K

7、eywordsğLateralbracingĠEigenvaluebucklinganalysisĠEquivalentmomentcoefficientĠRegressionanalysisᇏ๭щᅣ໓Cğ઒്ѓང໓3.323UTğোٳğ1007Ē3582č2014Ď04Ē0012Ē07ؓཌྷ૫ࢩ۱ᆜളӁѩ၍ҧളჸၴঘ၂ଖղᄛހຓđࡱܒေᇶܒࢲູቔਃۑ୥ሇ࢘đՎཋᆴൈđ൳࿢ၴჸളҧཟэྙđ๝ൈջ׮ڴϰބ൳ൈӫۑਃԛགྷຕ୥ാ໗bۑࢲܒഡ࠹ᇏсྶԉٳЌᆣࢲܒބܒࡱᆜุ໗קđఃᇏ൳࿢ၴჸഡᇂҧཟ൬۠ರ௹ğ2014-03-28ᆦӵ൞ิۚࢲܒᆜุ໗קྛᆭႵིծീb໡ݓu

8、ۑቔᆀࡥࢺğਾཬ஡č1986-Ďđଳđᇹ۽Ġህြٚཟ