鋼結(jié)構(gòu)構(gòu)件及整體框架抗火性能的有限元分析.pdf

1、北京工業(yè)大學(xué)碩士學(xué)位論文鋼結(jié)構(gòu)構(gòu)件及整體框架抗火性能的有限元分析姓名：魯博申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：結(jié)構(gòu)工程指導(dǎo)教師：王海忠20080401ABSTRACT皇曼曼皇量曼曼鼉曼舅量量舅量曼量曼璺量量曼曼皇曼曼曼曼曼魯曼曼量皇量鼉曼皇量曼曼曼曼曼曼皇曼舅皇曼曼曼舅曼曼曼曼曼曼量曼舅曼皇曼曼璺II量舅ABSTRACTWiththegrowthofChinaeconomic，ournation’Ssteelstructurebuildingsha

2、vebeendevelopingrapidlyInthelightofitsfastconstruction，goodearthquakeresistantcapacityfriendshiptoenvironmentandeconomicalefficiencysteelstructureisbecomingtobemorepopularinthemarketofsuperhighrisebuildingsandlargespanbu

3、ildingsAlthoughsteelisinflammablematerial，itsfireresistantcapacityispoorandmechanicalpropertyofsteelwillchangegreatlyinfireBecausethestrengthofsteelwilIreduceatelevatedtemperature，thiswillleadtothelossofstructuralcarryin

4、gcapacityinfireAtthesametime，excellentthermalconductionisgoodforheatspreadInthehightemperaturecondition，therewillbethermalcreepandsageffectalsoAslongassteelstructurebuildingsareinfire，theywillreachcarryingultimatestatein

5、ashorttimeuntilcollapseTherefore，itissignificanttoanalyzetheforceofsteelstructureinfireInthisthesis，structurefireproofdesignmethodbasedoncalculationisused，thermalconductiontheoryandstructuralanalysistheoryisutilized，fini

6、teelementsoftwareANSYSiSusedtosimulatethereaIstructure，tocalculatetheforceanddisplacementofsteelstructureinfireMaincontentsareasfoIlowsFirstlypnncipletheoryofthermalconductionandthermalphysicalcharacteristicsofsteelandot

7、herrelevantparametersusedinthisthesisareintroducedSecondlyLiu’Stestisusedascontrol，andfiniteelementanalysissoftwareANSYSisusedtosimulateLiu’StesI，bycomparingtheresultoffiniteelementanalysiswithLiu’Stestdata，thevalidityof

8、finiteelementanalysisisverifiedThirdlythefireresistantcapacitiesofrestrainedsteelbeamsarestudied。widththicknessratioofflange。heightthicknessratioofweb，thestiffnessofaxialandrotationalrestraintareanalyzedResultsshowthat，t