Page 120 - 2022年第53卷第6期
P. 120
Displacementbehavioranalysisandpredictionmodelof
concretegravitydamsincoldregion
1,2,3
YUANDongyang 1,2,3 ,GUChongshi ,GUHao 2,4
(1.StateKeyLaboratoryofHydrology - WaterResourcesandHydraulicEngineering,HohaiUniversity,Nanjing 210098,China;
2.CollegeofWaterConservancyandHydropowerEngineering,HohaiUniversity,Nanjing 210098,China;
3.NationalEngineeringResearchCenterofWaterResourcesEfficientUtilizationandEngineeringSafety,
HohaiUniversity,Nanjing 210098,China;
4.CollegeofAgriculturalScienceandEngineering,HohaiUniversity,Nanjing 210098,China)
Abstract:Displacementistheintuitivereflectionofcomprehensiveoperatingbehaviorofdamsunderthecoupling
effectofdynamicchangeofenvironmentalloadsandstructuralperformanceevolution.Areasonabledisplacement
behavioranalysisandpredictionmodeliscrucialtoscientificallydiagnosethehealthstatusandtopredictthefuture
operatingbehaviorofdams.Consideringthatthedisplacementbehaviorofconcretedamsin cold region is
significantly affected by ambienttemperature variation , to effectively interpretthe thermaldisplacement
characteristicscausedbythedynamicfluctuationofambienttemperature ,ameasuredboundarytemperature - based
displacementbehavioranalysismodelofconcretegravitydamsincoldregionisestablished.Meanwhile,tofurther
explorethecomplexcausalfunctionrelationshipbetweendisplacementanditsexplanatoryvariables,twinsupport
vectorregression(TSVR) withexcellentnonlineartrainingabilityisintroducedtoconstructthedisplacement
predictionmodel.AndTSVR parametersaresimultaneouslyoptimizedbywhaleoptimizationalgorithm (WOA).
Takingaconcretegravitydamincoldregionasanexample,thechangingamplitudeofhorizontaldisplacementof
anoverflowdamsectioncrestisquitelargeandthevariationlawofthisdisplacementisdifferenttothatofother
monitoringpoints.Thecauseofthisdisharmoniousdisplacementbehaviorisinterpreted with the proposed
displacementbehavioranalysismodel.Theresultisofgreatsignificanceforfurtherunderstandingthedisplacement
behaviorofconcretedamsincoldregion.Inaddition,engineeringexamplesindicatethattheproposedoptimized
TSVR - baseddisplacementpredictionmodelhasexcellentnonlinearinformationminingandpredictiveperformance.
Anewapproachisprovidedforaccuratelypredictingdamdisplacement.
Keywords:coldregion;concretegravitydam;displacementbehavior;predictionmodel;twinsupportvectorre
gression
(责任编辑:韩 昆)
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