T形截面梁的局部屈曲以及局部和整體彈塑性相關屈曲分析.pdf

1、浙江大學碩士學位論文T形截面梁的局部屈曲以及局部和整體彈塑性相關屈曲分析姓名：陳海嘯申請學位級別：碩士專業(yè)：結構工程指導教師：童根樹20040201塑矍塑堅奎蘭三塑!旦塑蘭堡堡墨LocalBucklingandInelasticInteractiveBucklingbetweenLocalandGlobalBucklingofTeeBeamsAbstractOwingtothemonosymmetricnature，teebeamsar

2、ehighlysusceptibletofailureintheflexural—torsionalbucklingmodewhensubjectedtobendingmomentsAlthoughmanystudieshavebeenperformedonlocalandlateralbucklingofmonosymmetricIbeams，fewstudieshavebeenmadeonthebucklingofteebeamsT

3、hispaperinvestigatestheelasticandinelasticlocalandglobalflexurai—torsionalbucklingofsimplysupportedteebeamsThebucklingcoefficientoftherectangularplateisobtainedviausingtheRaylei曲一RitzenergyapproachBasedontheunderstanding

4、ofthelocalbucklingoftherectangularplate，researchintothebucklingofsimplysupportedteebeamshasbeendevelopedTheGalerkinenergyapproachispresentedtodeterminetheelasticcriticalmomentsofsimplysupportedteebeams，assumingaspecialsi

5、neseriesforthebuckledshapesAndthegeneralFEAprogranaANSYSisalsousedtotestifytheresultSomeapproximateformulaeforthebucklingcoefficientofteebeamsundermomentgradientareproposedTheinelasticbucklingofteebeamisstudiedthroughthe

6、FEAprogramANSYSwiththeShell181elementThesolutionprocessconsiderstheinitialcurvatureandresidualstress，includingthematerialplasticityItisfoundthatthebucklingcapacityandbuckedmodeshapesdependontheparameterh／and以Whentheloadi

7、ngproducescompressioninthefreeedgeofthestem，interactivebucklingproducesacriticalmoment，whichislowerthanthelocalbucklingmomentKeywords：teebeams，overallbuckling，localbuckling，interactivebucklingbucklingcoefficient，ultimate