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Researchandperformanceverificationofhigh - pressurewaterway
reinforcedconcretesandwichsteelplatelining
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PEIJiangrong,WANGXiaogang,WEIXiaoling,LIUHeyi,CHENTiannan,LIULipeng
(1.ChinaInstituteofWaterResourcesandHydropowerResearch,StateKeyLaboratoryofSimulationand
RegulationofWaterCycleinRiverBasin,Beijing 100038,China;
2.SichuanHuanengLudingHydropowerCo.,Ltd.,Chengdu 610072,China)
Abstract:Toaddresstheissuesofwaterseepageandsusceptibilitytobucklinginsteelplateliningsofhigh - pres
surewaterways ,anovelreinforcedconcretesandwichsteelplatelininghasbeendevised.Thislining,primarily
comprisinganinnerlayerofreinforcedconcrete ,asteelplate,andanouterlayerofreinforcedconcrete,aimsto
enhancestructuralintegrity.Performancevalidationinvolvedamodeltestunderalternatinghighinternalandexter
nalwaterpressurestoexaminedeformationstressesandload - sharingvariations.Theresultsrevealedthatunderex
ternalpressure ,theliningmaintainsacompressedstatewitharelativelyconstantloaddistributionamongitscom
ponents.Thesteelplateexperiencedacompressivestressofonly1.47MPa ,whichissignificantlylowerthanthe
criticalstressof20.25MPa ,indicatingaminimalriskofinstabilityorbuckling.Underinternalpressure,thelin
ingissubjecttotension,withtheinnerconcretelayerpronetocrackingbeforetheouterlayer.Priortocrackfor
mation,theload - sharingremainsessentiallyunchanged.Aftercracking,theloadbornebytheconcretedecreases
andthatbornebythesteelplateandthesurroundingrockincreases.Despitethis,thesteelplate'stensilestress
doesnotexceed28.01MPa ,whichisfarlowerthanitsultimatetensilestrength.Relativetoconventionallinings,
thisinnovativestructuralsolutiondemonstratesenhancedperformanceinmanagingthedemandsofhigh - pressurea
quaticenvironments.
Keywords:reinforcedconcrete;sandwichsteelplatelining;internalandexternalwaterpressure;loadsharingratio
(责任编辑:李 娜)
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