列車荷載作用下武漢站上部鋼結(jié)構(gòu)的疲勞分析.pdf

1、武漢理工大學(xué)碩士學(xué)位論文列車荷載作用下武漢站上部鋼結(jié)構(gòu)的疲勞分析姓名：劉祥申請學(xué)位級別：碩士專業(yè)：結(jié)構(gòu)工程指導(dǎo)教師：謝偉平20100401AbstractAstherapiddevelopmentsofrailwayconstructioninourcountryandhigherspeedoftrains，thestructuresoflarge—scaledrailwaystationsnowadayshasbeendevelopi

2、ngtowardsthedirectionsofhugesize，multifunctionandspatializationMoreandmorelarge—spanspatialsteelroofstructureswithuniqueshapesandnovelformsappearThelarge—spanspatialsteelroofstructuresownSpecialitiessuchasgoodrigiditylig

3、htweight，fineflexibilityandsmallamortizationHoweverbecauseofthemainuseofsteelstructureandsusceptivityofsteelstructureespeciallytheonethattheweldingsteelstructuretodynamicload，endurancefailureofthisstructurewillbearousedb

4、ytheenduranceofalong—perioddynamicloadWuhanstationofthespeciallineforpassengertransportbetweenWuhanandGuangzhouhasadoptedanewstructuremodeofajointofstationandbridgeThebaseoftheupperlargespanIooffeaturingspacelatticesisth

5、epieroftherailwaybridgeAsaresult，thevibrationscausingbyhigh—speedtrainstransmittOtheupperlargespanroofdirectlyanditwillenduredynamicactionsoftrainsforalongtimeItmakesUStoworryaboutitssafetyTherefore，studyofcharacteristic

6、sofendurancethatthelargespanrooffeaturingspacelatticesbearsundertrains’vibratingloadandcalculationandevaluationofitsendurancelifehaveanimportantsignificancetOensurethesafeuseofWuhanstationInthisstudy，dynamicresponseofupp

7、erstructuresofstationsubjectedtotrainloadingiscalculated，thenthefatigueperformanceofstructuresisanalyzedThemainconclusionsofthisstudycouldbesummarizedasfollows：1Dynamicresponsecharacteristicofbridgesubjectedtotrainloadin

8、gisanalyzedbytravelingload—bridgebasictheory，obtainingsupportreactionofbridge2Usethesupportreactionasinputloadofupperlargespansteelstructures，dynamicresponseofupperlargespansteelstructuresiscalculatedTheinformationofthem

9、aximumstressofeachstructurecomponentsarepresentedandstructureweakpartsaredetermined3Fatiguecharacteristicofthestructureweakparts(themaximumstressparts)isevaluatedbasedonMinertheory4EstablishthefinefiniteelementmodesofVpa

10、tternbracinguppercaststeelnodesandpattencaststeelnodes，themodescontainweldjointsInternalforceofweldjointsiscalculatedthroughappliedinternalforcetomodesFatiguecharacteristicofthetwokindsofnodesisevaluatedbasedonhotspotstr