超高層巨型鋼框架結(jié)構(gòu)失效模式分析.pdf

1、大連理工大學(xué)碩士學(xué)位論文超高層巨型鋼框架結(jié)構(gòu)失效模式分析姓名：沈霄鶴申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：土木工程、結(jié)構(gòu)工程指導(dǎo)教師：歐進(jìn)萍20091201超高層巨型鋼框架結(jié)構(gòu)失效模式分析Abs仃actAsthegrowthofcitypopulationandincreasingofbuildingheight，building’Shorizontalload，verticalloadandoverturningforcemomentismorea

2、ndmorebigWhat’Smore，higherstandardsoftheinternalspaceareusedinmodemarchitecture，suchasbuildingsusedforexhibitions，culturalactivities，andSOonTomeettheconstructionofanewsituationandtherequirementsmentionedbefore，hugesteelf

3、ramestructurescameintobeingBecausemoreandmorehugesteelframestructuresareappliedincivilengineeringitissignificantlyimportanttoimproveseismiccapacityofstructuresbyoptimizingthefailuremodesofstructuresMethodsoffailuremodesa

4、nalysisandimprovementofhugesteelframestructurefailuremodesarestudiedinthispaperwhichCanincreaseintegralseismiccapacityMainresearchcontentsareasfollows：1AhugesteelframestructurehasbeendesignedinthispaperTwomorestructuresa

5、recreatedbychanginglocationsorheightofgiantbeam2Basedonnonlinearandelastic—plasticpushoveranalysisofthreehugesteelframestructuresbyusingsomefiniteelementsoftware，failuremodesofdifferenthugesteelbeamlocationsorheightsareo

6、btainedWhentheloadsarefixed，thereisonlyonestructuralfailuremodeforeachstructureBycomparingmaximalstorydriftangleandbaseshearofeverystructurefailuremode，takingintoaccountofyieldbraceinpushoveranalysis，optimalstructureform

7、ofhugesteelframestructurecanbefound3SomenormalbracewhichisfailedofoptimalstructureformisreplacedbybucklingrestrainedbraceandstructurefailuremodeofnewstructurewillbecomparedwithexistingfailuremodeRepeatthisprogressoverand

8、OVeragain，thefailuremodeofhugesteelframestructureischangingandintegralseismiccapacityisimprovingSomenewstructuresaregotbeforeallbracesaretakenplacebybucklingrestrainedbraces，whichincludeabeststructure4Nonlineartimehistor

9、yanalysisisappliedonaseriesofnewstructures，byusingtwoseismicwaveswhichpeakaccelerationisincreasingstepbystepAccordingtodisplacementOVelTUnfailurecriterionandstructureinstabilityfailurecriterion，integralseismiccapacityofs

10、tructuresisobtainedVerificationoftheoptimalstructurefrompushoveranalysisCanbeperformedbycomparingeachstructure’Sintegralseismiccapacityneresultsare硒follows：enlargetheheightofgiantbeamcanimprovestructureintegralseismiccap