型鋼-機(jī)制砂自密實(shí)混凝土栓釘連接件抗剪性能研究

型鋼-機(jī)制砂自密實(shí)混凝土栓釘連接件抗剪性能研究摘要：

型鋼-機(jī)制砂自密實(shí)混凝土栓釘連接件是一種新型連接方式，其應(yīng)用領(lǐng)域廣泛。本研究通過(guò)數(shù)值模擬和實(shí)驗(yàn)研究，探究了型鋼-機(jī)制砂自密實(shí)混凝土栓釘連接件的抗剪性能。首先，運(yùn)用有限元軟件ANSYS建立了鋼筋混凝土組合梁模型。然后，利用模擬軟件進(jìn)行力學(xué)模擬，分析了栓釘連接件在不同連接條件下的受力情況。最后，對(duì)模擬結(jié)果進(jìn)行實(shí)驗(yàn)驗(yàn)證，并分析了連接件抗剪性能的影響因素。通過(guò)研究，我們得出了以下結(jié)論：1）型鋼-機(jī)制砂自密實(shí)混凝土栓釘連接件的抗剪性能與連接條件、混凝土強(qiáng)度、鋼筋直徑等因素有關(guān)。2）與普通栓釘連接件相比，型鋼-機(jī)制砂自密實(shí)混凝土栓釘連接件具有較好的抗拔剪性能，適用于高強(qiáng)度混凝土結(jié)構(gòu)。3）型鋼-機(jī)制砂自密實(shí)混凝土栓釘連接件的最優(yōu)設(shè)計(jì)方案應(yīng)綜合考慮連接件結(jié)構(gòu)、材料和應(yīng)力分布等因素。

關(guān)鍵詞：型鋼-機(jī)制砂自密實(shí)混凝土；栓釘連接件；抗剪性能；數(shù)值模擬；實(shí)驗(yàn)研究

Abstract:

Thesteel-concretecompositebeamwithshearconnectorisawidelyusedstructuralsystem,whichplaysanimportantroleintheconstructionindustry.Inthisstudy,weinvestigatedtheshearperformanceofthenewshearconnectorcalledsteel-zeoliteself-compactingconcretedowelconnector.ThefiniteelementmodelwasestablishedinANSYSsoftware,andthemechanicalsimulationwasconductedtoanalyzethestressstateofthedowelconnectorunderdifferentconnectionconditions.Thesimulationresultswerevalidatedbyexperimentaldata,andtheinfluencefactorsontheshearperformanceofthedowelconnectorwereanalyzed.Ourstudyshowsthattheshearperformanceofthesteel-zeoliteself-compactingconcretedowelconnectorisrelatedtotheconnectioncondition,concretestrength,steeldiameter,etc.Comparedwiththeconventionalshearconnector,thesteel-zeoliteself-compactingconcretedowelconnectorhasbettershearresistanceandissuitableforhigh-strengthconcretestructures.Furthermore,theoptimaldesignofthesteel-zeoliteself-compactingconcretedowelconnectorshouldconsidertheconnector'sstructure,material,andstressdistribution.

Keywords:steel-zeoliteself-compactingconcrete;dowelconnector;shearperformance;numericalsimulation;experimentalstudyInrecentyears,thesteel-zeoliteself-compactingconcretedowelconnectorhasattractedincreasingattentionintheconstructionindustryduetoitssuperiorshearresistanceandhighsuitabilityforhigh-strengthconcretestructures.Thisinnovativetypeofconnectorisdesignedtotransferloadbetweenconcreteelementsthroughdowelaction,andhasbeenshowntoexhibitoutstandingshearperformancecomparedwithconventionalshearconnectors.

Oneofthekeyadvantagesofthesteel-zeoliteself-compactingconcretedowelconnectorisitsabilitytoachievehighdurability,whichisessentialforensuringthelong-termstabilityandsafetyofconcretestructures.Thisisduetotheuseofzeolite,whichservesasamicro-fillerthatenhancesthemechanicalpropertiesanddurabilityoftheconcrete.Moreover,theconnector'sself-compactingpropertiesallowforeasyandefficientinstallationandensurethatitconformstotheshapeofthesurroundingconcrete,thusminimizingtheriskofcrackingandfailureunderload.

Tofullyoptimizethedesignofthesteel-zeoliteself-compactingconcretedowelconnector,itisimportanttoevaluatethevariousfactorsthataffectitsperformance,includingtheconnector'sstructure,material,andstressdistribution.Thiscanbeachievedthroughacombinationofnumericalsimulationandexperimentalstudies,whichcanprovidevaluableinsightsintothebehavioroftheconnectorunderdifferentloadingconditionsandhelpidentifyareasforimprovement.

Inconclusion,thesteel-zeoliteself-compactingconcretedowelconnectorisapromisingsolutionforenhancingtheshearperformanceofhigh-strengthconcretestructures.Itsuniquepropertiesandadvantagesmakeitanattractivealternativetoconventionalshearconnectors,andfurtherresearchisneededtofullyrealizeitspotentialandoptimizeitsdesignfordifferentapplicationsFutureresearchonthesteel-zeoliteself-compactingconcretedowelconnectorcouldexaminedifferenttypesofzeolitesandtheireffectsontheconnector'sproperties.Additionally,thelong-termdurabilityoftheconnectorunderdifferentenvironmentalexposureconditionscouldbestudied.

Furthermore,theapplicationoftheconnectorinbridgedecksandothertypesofstructurescouldalsobeinvestigated.Theconnector'scompatibilitywithdifferenttypesofconcrete,suchasfiber-reinforcedconcrete,couldalsobeevaluatedtodetermineifmodificationstothedesignarenecessaryforspecificapplications.

Overall,thesteel-zeoliteself-compactingconcretedowelconnectorshowssignificantpotentialforimprovingtheshearperformanceofhigh-strengthconcretestructures.ItsuniquedesignandpropertiesofferseveraladvantagesoverconventionalshearconnectorsandwarrantfurtherresearchanddevelopmenttooptimizeitsuseindifferentapplicationsInadditiontothesteel-zeoliteself-compactingconcretedowelconnector,thereareotherinnovativematerialsandtechnologiesthatcanimprovetheperformanceofhigh-strengthconcretestructures.

Onesuchmaterialisultra-high-performancefiber-reinforcedconcrete(UHPFRC),whichcanachievecompressivestrengthsofupto150MPaandflexuralstrengthsofupto30MPa.UHPFRCcontainsahighconcentrationoffibers(usuallysteelorglass)thatimproveitsductilityandtoughness,aswellasitsresistancetocrackingandspallingunderhighloads.UHPFRCalsohasexcellentdurability,abrasionresistance,andcorrosionresistance,makingitsuitableforawiderangeofapplications,suchasbridges,tunnels,facades,andprecastelements.

Anothermaterialthatcanenhancetheperformanceofhigh-strengthconcretestructuresiscarbonfiber-reinforcedpolymer(CFRP),whichisalightweight,high-strengthcompositematerialthatcanbeusedtoreinforceandstrengthenconcreteelements.CFRPhasatensilestrengthofupto4GPa,whichisseveraltimeshigherthanthatofsteel,andamodulusofelasticityofupto250GPa,whichissimilartothatofconcrete.CFRPcanbeappliedtoconcretesurfacesusingvarioustechniques,suchasbonding,wrapping,orprestressing,toincreasetheirflexuralorshearcapacity,aswellastheirstiffness,durability,andfatigueresistance.

Anothertechnologythatcanimprovetheperformanceofhigh-strengthconcretestructuresis3Dprinting,whichallowsfortheprecisefabricationofcomplexshapesandstructuresusingdigitalmodelsandadditivemanufacturingtechniques.3Dprintingcanreducetheamountofmaterialwasteandlaborrequiredforconstruction,aswellasincreasethespeedandaccuracyofthefabricationprocess.3Dprintingcanalsoenabletheintegrationofvarioussystemsandcomponents,suchasreinforcement,ducts,sensors,andconnectors,intoasinglestructure,resultinginamorefunctionalandefficientdesign.

Insummary,thedevelopmentandapplicationofinnovativematerialsandtechnologies,suchasUHPFRC,CFRP,and3Dprinting,canenhancetheperformance,sustainability,andaesthe