四线双桁连续钢桁梁节点受力性能-研究

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1、西南交通大学硕士研究生学位论文第1I页AbstractDongxinGanjiangRiverBridgeisathroughtypecontinuoussteeltrussbridge．Itsspanarrangementis126+196+126m，whichisthefirstlong-spandoublesteeltrUSSbridgewithfour-lineinChina．Thetopchordofthemaintrussisassemblyjointed,whichischaracterizedbygreatinternalforceand

2、complicatedstructuredetails．BasedonthebackgroundofDongxinGanjiangRiverBridge，systematicalinvestigationbasedonthemodeltesthasbeendonetostudythemechanicalbehaviorofA9joint．Themainresearchcontentsareasfollows：I、Inordertogetthemostpossibleunfavorableprocessingconditionsofthejointsund

3、erthecombinationofdeadloadandliveload，afiniteelementmodelisestablishedbythespatialplateshellmethodaccordingtothecharacteristicsoffour-linedouble—trussplate—trusscompositebridges‘2、Thescalemodelin1：4ratioWasdesignedand．manufacturedinordertosimulatethestressstatesofA9jointintheposi

4、tionofthemiddlesupportofactualBridge．3、UsingtheFEMsoftwareANSYS，shellclementisappliedtosimulatejointstructuredetailsandlocalFEManalysishasbeendone．Thejointstressstateaswellastheperformanceunderthedesignloadandultimateloadhavebeenobtained．4、ScalemodeltestWascarriedouttoinvestigate

5、thejointstressstateandperformanceunderthedesignloadandultimateload．5、Theresultsofthemodeltestandthetheoreticalcalculationwerecomparedandthevalidityoftheoreticalcalculationwasinvestigated．Theresultsshowedthatthestresslevelofthemodeltestishigherthanthetheoreticalanalysiswhichsimula

6、tesfrictionalhigh-strengthboltsbyincreasingthethicknessofjointplates．6、Mechanicalperformanceofthejointundertheultimateloadisevaluatedthroughthemodeltest．Furthermore，itisconcludedthatthedesignofassemblyjointisdeterminedbythestressofjointplatesectionandrodmiddlesectionkeywords：Dong

7、xinGanjiangRiverBridge；doubletrUSS、历mfour-line；platetrusscompositesystem；assemblyjoint西南交通大学硕士研究生学位论文第1II页目录第1章绪论⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．11．1引言⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯11．2本文工程背景⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯21．3本文的主要研究内容⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯3第2章东新赣江桥全桥受力

8、性能分析⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯。42．1工程概况⋯⋯⋯⋯⋯⋯⋯⋯⋯