噶米多层与高层建筑结构概念设计-风在跑(Multi-storey-and-high-rise-bui

多层与高层建筑结构概念设计_风在跑（Multi-storeyandhigh-risebuildingstructureconceptdesign_windisrunning）TheresearchandpracticeoftheexpansionofhyperbolicarchbridgeChenjiejunwangqun(jiangxitrafficbridgedetectionandreinforcementco.,LTD.Nanchang330038)Abstract:takingthemagangbridgeasanexample,thispaperexpoundsthesynthesisofvariousreinforcementtechniquesfortheexpansionofthehyperbolicarchbridgeUse,suchaspastecarbonfibercloth,anchoringconcrete,changearchconstructionform,outsourcingconcrete,etc.Keywords:bridgeengineering;Hyperbolicarchbridge;Broaden;Load;Integratedapplicationof0forewordThehyperbolicarchbridgeisakindoflightarchbridgewhichwasfirstdevelopedbyjianqiaoworkersinwuxicounty,jiangsuprovinceinthemid-1960s.Becauseoftheneednottobuildthearch,savethetimber,theconstructionprogressfast,andtheconsumptionofsteel,thiskindofbridgetypeappears,quicklyinthewholecountrytogetalargenumberofpromotionapplication.Butbecauseofthedesignloadislow,coupledwithhyperbolicarchcomposedofarchrib,twowaycurvedarchtile,archboardandhorizontallinkagesinacertainorder,andthecombinationofriband,platesurfaceistoosmall,thestresscomplex,integrityispoor,which60~80sbuiltalargenumberofhyperbolicarchBridgesinoperatingyearslaterappeareddifferentdegreeofdisease,thereareserioussecurityhiddendanger,havenotadaptedtotheincreasingtrafficdemand.Duetothelargeoverloadpotentialofthearchbridge,mostofthemcanbeusedforcontinuousreinforcementandmaintenance,andcanevenbeextendedtoachievehigherdesignstandards.Inthispaper,theauthordiscussesthequestionofhowtoeffectivelyutilizethehyperbolicarchbridgewiththeindustry.Themagangbridge(seefigure1)islocatedattheK2+250(newpilenumber)ofxiuwuroad,whichwasbuiltin1974.Thesuperstructureoftheupperstructureis2-span40m,andthesemi-circulararchofthedoublecurveofthedoublecurvedlineofthecross-sectionofthecross-sectionofthecross-sectionofthecross-sectionofthecross-section,andthetwosidesofthecross-sectionofthecross-section.Theoriginaldesignloadiscar-level13,trailer-60;Thebridgeisclear:net-7+2x0.35mrailings.Duetotherenovationoftheroadinaccordancewiththesecondaryhighwaytechnicalstandard,thedesignloadofthebridgeisnow:automobile--20,trailer--100,crowd--3.5KN/m2;Thebridgeisclear:net-9+2x1.5mpavement.Sogomaconnaisebridgeaccordingtothisstandardhasbeenbroadeningandstrengtheningthereformin2003,afterthewalkmaconnaisebridgewithitsnewlooktoadapttothedevelopmentoftransportation,wonthepraiseofthelocalgovernmentandthepeople.EMBEDAutoCAD.Drawing.14FIG.1generallayoutofmagangbridgeThemaindiseasesofthebridgebeforethetransformation1.1archribdeformationandfractureThefirstspanofthemainarchribisgood,andnoilleffectshavebeenfoundtoaffectthestructuralstress,onlythelateralfracturecausedbyexcessivebendingmomentisfoundintheuppermarginofthearch,andthewidthofthefractureisabout1mm.Thesecondcrossarchribsalsohavethesametypeoffracture.Secondacrossthemainarchrib,long-termbyheavytruckloadandhorizontalthrustthewuningshoreabutmentinbackwardtiltofthetrend,thevaulttoproducelargersettlement,changedtheoriginalstructurestress;Thearchcostalarchissubjectedtoacrackduetoexcessivetensilestress.1.2abdominalarchandarchwallOntheself-repairingwaterbankofthebridge,theabdominalarchof3,6,11,and14isthewholecast-in-placearchloop,whichbasicallyhasthetransversewidthofthecrack,andthegapwidthis0.1~2mm.Therestoftheabdomenarchringsystembytheprecastconcretearchwithcementmortarmasonryandbecome,byon-siteinspection,foundthatthecementmortarisnotfullphenomenonismoreserious,archringvaultneartherearetransversecracksthrough0.5~6mmwide.Theconcreteweatheringandlocalspallingofthearchwallareserious,andthefractureofthelateralwallismostlywiththearchoftheabdominalarch.1.3abdomenarchmoundTheabdominalarchpierisconstructedbyconcreteprecastblock,andthecrackisnotregular,andthereisacrackintheintersectionofthearchandarch.1.4thedeckThebridgehasbeensubjectedtoheavyloadforalongtime,andthebridgedeckhasbeendamagedseriouslyandhasmanyholes,anditsverticalwavesarewavy,especiallyinthesecondspan.Thedamageofthebridgehasincreasedtheimpactcoefficientofthevehicle,whichhasseriouslyaffectedtheuseandcomfortofthebridge,andhasalsocontributedtothedamageofthebridgestructure.1.5piersandplatformsNodamagetothestructureofthebridgewasfound.Thebridgeofwuingbankhasthesignsofbackwardleaning,andthewallsofthetwosidesarecrackedandtheseamsare0.1~7mmwide.Someofthemareweatheredandbroken,andthelocalmortarisnotfull.ThetwosidesoftheTaiwanstraithavebeenexamined,andtherehavebeennoilleffectsonthestructuralstressanduse.2.TakethemagangbridgetoexpandthetechnologyofliftloadAfterthestructureofthebridgecheckandstructurestrengthcalculationofmaincomponents,theultimatestateofbridgecarryingcapacitytomeettheoriginaldesignload(auto-level13;trailer-60)userequirement,butisnotinconformitywiththeforceofsecondaryroadimprovementdesignrequirements.Andconsideringthatthesecondspanofthebridgehascracksintheloweredgeofthearchandtheupperedgeofthearch,thedurabilityofthebridgeisaffected,andthecomprehensivereconstructionofthebridgeshouldbeextended.2.1reinforcementandtransformationofmainarchringThemainarchriboftheb