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变高度波形钢腹板组合箱梁的抗剪性能研究.docx

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变高度波形钢腹板组合箱梁的抗剪性能研究 Abstract Withtherapiddevelopmentoftransportationinfrastructure,thedemandforbridgeconstructionhasincreasedsignificantly.Thecombinedboxgirder,consistingofavariableheightwaveformsteelwebandasteelbellyplate,hasemergedasapromisingsolutionduetoitshighshearresistance.Thisstudyaimstoinvestigatetheshearperformanceofvariableheightwaveformsteelwebandsteelbellyplatecombinedboxgirder,providingvaluableinsightsforitspracticalapplication. 1.Introduction 1.1Backgroundandsignificanceofthestudy Thecombinationofavariableheightwaveformsteelwebandasteelbellyplateinaboxgirderstructurehasbeenwidelyadoptedinbridgeconstructionduetoitsfavorablemechanicalproperties,suchashighshearresistanceandimprovedload-carryingcapacity.However,studiesontheshearperformanceofsuchcombinedboxgirdersarestilllimited,callingforfurtherinvestigation. 1.2Researchobjectives Themainobjectivesofthisstudyaretoevaluatetheshearresistanceofthevariableheightwaveformsteelwebandsteelbellyplatecombinedboxgirder,examinetheinfluenceofkeydesignparametersonitsshearperformance,andproposeoptimizationstrategiesforpracticalapplications. 2.LiteratureReview 2.1Previousstudiesoncombinedboxgirders Researchershaveconductednumerousstudiesonthemechanicalbehavioranddesignoptimizationofcombinedboxgirders.Moststudieshavefocusedontheflexuralperformanceandultimatestrengthofthecombinedboxgirders,withlimitedresearchontheirshearresistance.Therefore,thisstudyaimstofillthisresearchgapandcontributetotheunderstandingoftheshearbehaviorofthecombinedboxgirders. 2.2Keydesignparameters Severalkeydesignparameters,suchastheheightandwidthofthewaveformsteelweb,thethicknessofthesteelbellyplate,thespacingofthetransversewebs,andthematerialproperties,havebeenidentifiedascriticalfactorsaffectingtheshearperformanceofthecombinedboxgirder.Adetailedinvestigationoftheseparametersisnecessarytounderstandtheirimpactontheshearresistance. 3.Methodology 3.1Experimentaltesting Inthisstudy,aseriesofexperimentaltestswillbeconductedusingscaled-downcombinedboxgird