加強開口薄壁構(gòu)件抗扭性能的措施.pdf

1、浙江大學碩士學位論文加強開口薄壁構(gòu)件抗扭性能的措施姓名：林南昌申請學位級別：碩士專業(yè)：結(jié)構(gòu)工程指導教師：童根樹2002.2.1一^塑蔓塑堊盔堂堡圭堂竺絲塞二!!絲MEASUltESTOINHANCETHETORSIONI己ESTRAINTABILITYOFTHINWALLEDoPENSECTl0NBEAMSABSTRACTIt’Swellknownthatthinwalledopensectionbeamsarerelativelywe

2、akinresistingtorsionInordertoinhibitthewarpingofthesection，varioustechniqueshavebeenutilizedButtheeffectivenessofplatestiffenersisnotclarifiedtillnow111isthesislaysemphasisonthetwoaspectsoftheresponseoftheplatestiffeners

3、whenthemaingirderissubjectedtotorsionalloadsFirstly，theresearchworkdealswiththebehaviorofIbeamandchannelbeamwithplatestiffener，tOseewhetherstiffenersCanmarginallyimprovethetorsionrestraintabilityByintroducinganewinfluenc

4、efactor，whichisrelatedtotheflangewidthandthickness，thelocaldistortionoftheflangeisincorporatedThenthewarpingrestraintstiffnessofplatestiffenersisdeducedTheanalyticalresultsareincloseagreement、^，itllAnsysSecondlythestiffe

5、nedIbeamsubjectedtoinplaneendmomentsandchannelbeamaxialloadedarestudiedTheflexuraltorsionalbucklingdifferentialequations，、Ⅳi也theboundaryconditionsbasedOi“1thewarpingrestraintstiffnessofplatestiffeners，areusedtoinvestigat

6、ethestabilityproblemofbeams弛eeffectivenessofthestiffenersisdiscussedundervariousconditions功eresearchworkisofsomereferenceforpracticaldesignoftheplatestiffenersincivilengineeringKeywords：TorsionT11inwalledgirderPlatestiff