简介：ThecalculationofultimatebearingcapacityisasignificantissueinthedesignofConcreteFilledSteelTubular(CFST)archbridges.Basedonthespacebeamtheory,thispaperprovidesacalculationmethodfordeterminingtheultimatestrengthofCFSTstructures.Theaccuracyofthismethodandtheapplicabilityofthestress-strainrelationshipswerevalidatedbycomparingdifferentexistingconfinedconcreteuniaxialconstitutiverelationshipsandexperimentalresults.Comparisonoftheseresultsindicatedthatthismethodusingtheconfinedconcreteuniaxialstress-strainrelationshipscanbeusedtocalculatetheultimatestrengthandCFSTbehaviorwithsatisfactoryaccuracy.Thecalculationresultsarestableandseldomaffectedbyconcreteconstitutiverelationships.Themethodisthereforevaluableinthepracticeofengineeringdesign.Finally,theultimatestrengthofanarchbridgewithspanof330mwasinvestigatedbytheproposedmethodandthenonlinearbehaviorwasdiscussed.

简介：Aslip-linefieldsolutionispresentedfortheultimatebearingcapacityofthepipelineonapurely-cohesiveclaysoil,takingintoaccountthecircularconfigurationofthepipe,thepipeembedment,andthepipe-soilinterfacialcohesion.Thederivedbearingcapacityfactorsforasmoothrigidpipelimittothosefortheconventionalrectangularstripfootingwhilethepipeembedmentapproacheszero.Parametricstudiesindicatethat,thepipe-soilinterfacialpropertieshavemuchinfluenceonthebearingcapacityforthepipefoundationonclayedysoils.