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Workingmechanism andtheoreticalcalculationmethodofnovel
dampingenergydissipationdebrisflowgrilledam
1,2
1,2
3
1,2
1,2
WANGYongsheng ,GUOWenxiang ,ZHANGXiaoyan ,PANYuanwen ,WANGYanbing
(1.SchoolofCivilEngineering,LanzhouUniversityofTechnology,Lanzhou 730050,China;
2.WesternCenterforDisasterMitigationinCivilEngineeringofMinistryofEducation,
LanzhouUniversityofTechnology,Lanzhou 730050,China;
3.GansuTrafficEngineeringConstructionSupervisionCo.,Ltd.,Lanzhou 730050,China)
Abstract:Inordertosolvetheproblemthatthetraditionalgrilledamiseasytobedamagedbytheimpactofdebris
flow,anovelDampingEnergyDissipationDebrisFlowGrilleDam(DEDDFGD)isproposed,anditsstructural
compositionandworkingprincipleareinterpreted.Basedontheforcemethod ,deformationcompatibilityequation
andWinklerelasticfoundationbeamtheory ,themechanicalcalculationmodelofeachcomponentintheenergydis
sipationandresetstageofthenovelstructureisestablished ,andthecalculationmethodoftheburieddepthofthe
columnisgiven.Themechanicalpropertiesofthenovelstructurewereanalyzedbyfiniteelementsoftware ,andthe
theoreticalandsimulatedvalueswerecompared.Theresultsshowthat :(1)ThenovelDEDDFGDisproposedon
thebasisofflexibleenergydissipationconcept ,whichconsumestheimpactenergyofdebrisflowthroughtheup
streamgrilleandthedampingenergydissipationbrace.Comparedwiththetraditionaldebrisflowgrilledam ,the
impactresistancepowerisgreatlyimproved.(2)TheforceofnovelDEDDFGDisdividedintotwostages:energy
dissipationandreset.Thedeformationcoordinationintheenergydissipationstagemakestheinternalforceofthe
beambetweenthesidecolumnandthemiddlecolumnchangesharplyattheendoftheslidingbearing,which
shouldbeconsideredinthedesign.Intheresetstage ,theinternalforceofthetopverticalbarandthecrossbeam
isgreaterthanthatofotherlayers,whichshouldbecheckedemphatically.(3)Thetheoreticalcalculationisbasi
callyconsistentwiththeinternalforcechangetrendofeachcomponentofthesimulation ,whichverifiesthereliabil
ityofthecalculationmethodinthispaper.Theresultscanprovideatheoreticalbasisfortheapplicationofthenovel
DEDDFGD.
Keywords:debrisflow;novelDEDDFGD;workingmechanism;internalforcecalculation;cooperativebearing
(责任编辑:李 娜)
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