Page 156 - 《水资源与水工程学报》2022年第2期
P. 156
!33 " ! 2 # & ' ( ) & * + , - Vol.33No.2
2022 $ 4 % JournalofWaterResources&WaterEngineering Apr.,2022
DOI:10.11705/j.issn.1672-643X.2022.02.20
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HIAJK:TV312 LMNOP:A LQRK:1672643X(2022)02015206
Influenceofworkingbridgeonseismicperformanceof
integralsystem ofintaketowers
1
2
1
1
1
ZHANGHanyun,ZHANGYunjuan,ZHANGShengtai,WANGChen,WANGYingjie
(1.CollegeofWaterConservancyandHydropowerEngineering,HohaiUniversity,Nanjing210098,China;
2.NanjingMunicipalDesignandResearchInstituteCo.,Ltd.,Nanjing210008,China)
Abstract:Theinteractionbetweentheintaketower,workingbridge,reservoirwaterandfoundationis
complexunderseismicactions.Theintegralfiniteelementmodelofthetowerbody-hoistchamber-
workingbridge-foundation -reservoirwaterwasestablished ,withwhichtheinteractionbetweenthe
structureandreservoirwaterwassimulatedbasedonthepotentialfluidtheory,andthefoundationradia
tiondampingeffectwasinvestigatedusingtheviscoelasticartificialboundary.Inturn,theeffectofdy
namicinteractionsbetweenstructure,reservoirwater,workingbridgeandfoundationonthenaturalvibra
tioncharacteristicsandseismicresponseoftheintegralintaketowersystemwasstudied.Theresultsshow
thatthedownstreamdisplacementandaccelerationoftheintaketowercanbereducedby25.15% and
14.33% respectively ,andthemaximumtensilestressofkeypointsoftheintaketowercanbereducedby
morethan12.0%,withthepresenceoftheworkingbridgeatnormalwaterlevel.Thedynamicresponse
oftheintaketowerstructureisobviouslyreducedwhenconsideringthefoundationradiationdamping
effect ,andthemaximumtensilestressofthekeypointcanbereducedbymorethan40%.Compared
withtheworkingbridge ,thefoundationradiationdampingeffecthasamoresignificantinfluenceonthe
hydrodynamicpressure ,acceleration,displacementandstressresponseoftheintaketowerunderseismic
actions.
Keywords:intaketower;seismicperformance;workingbridge;potentialflow;hydrodynamicpressure;
viscoelasticartificialboundary
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