简介：Theprojectfocusesonthedynamicanalysisofconcretebeamsreinforcedwithsilica-nanoparticlesunderblastloading.Thestructureislocatedattwoboundaryconditions.TheeffectivecompositepropertiesareobtainedutilisingMori-Tanaktheory.Thestructureissimulatedwithsinusoidalsheardeformationtheory.Applyingstrainsandstress,thebeamenergiesarederivedandutilisingprincipalofHamilton,thefinalequationsarecalculated.Usingmethodofdifferentialquadrature(DQM)andNewmark,thestructuredynamicdeflectionisobtained.Theinfluencesofvolumefractionandagglomerationofsilicananoparticles,parametersofgeometrical,boundaryconditionandblastloadonthedynamicdeflectionarestudied.

简介：Asemi-analyticalmethodofsolvingtheproblemofdynamicstressconcentrationofarbitraryundergroundstructureundertheeffectofblastwaveswasintroduced.UsingtheFouriertransformtheory,theshockwaves(intheformsofSH-waves)canbeconvertedintofrequencybands.Afteremployingcomplexfunctionsandconformalmapping,theadmittancefunctionsofvariousundergroundstructureswereobtained.Then,theproblemofthetimedomaindynamicstressresponseofundergroundstructurecanbeeasilysolvedthroughtheFourierinversetransform.Atlast,theresultsandcurvesofthedynamicstressforthesquare,triangleandhorseshoecavitywerepresented.

简介：Thestructuraldeformationvelocityplaysasignificantroleinthedynamiccalculationofundergroundblast-resistantstructures.Themotiondifferentiatingequationofastructuresystemtakingintoaccounttheroleofdeformationvelocityofthestructurewilltruthfullydescribetheactualsituationofstructuralvibration.Withtheone-dimensionalplanewavetheory,theexpressionofloadonthestructuralperipheryisdeveloped,andthegeneralizedvariationprincipleforthedynamicanalysisofundergroundarched-barstructuresisgiven.Atthesametime,theresultsofthenumericalcalculationarecompared.