of 26/26
MIAMI SCIENCE MUSEUM BONDED POSTTENSIONING OF GULF STREAM TANK by Katherine Farley (Kline Engineering & Consulting) Sharath Murthy, P.E (VSL)

MIAMI SCIENCE MUSEUM BONDED POST …ww2.post-tensioning.org/2014PTIConvention/Session2/3.pdf · MIAMI SCIENCE MUSEUM ‐BONDED POST‐ TENSIONING OF GULF STREAM TANK by Katherine

  • View
    213

  • Download
    0

Embed Size (px)

Text of MIAMI SCIENCE MUSEUM BONDED POST …ww2.post-tensioning.org/2014PTIConvention/Session2/3.pdf ·...

  • MIAMISCIENCEMUSEUM BONDEDPOSTTENSIONINGOFGULFSTREAMTANK

    byKatherineFarley(KlineEngineering&Consulting)

    SharathMurthy,P.E(VSL)

  • OutlineofPresentation OverviewofTank PostTensioningandConstructabilityDetails

    DesignCriteria LoadingScheme Modeling Analysis&Results

  • Overview 600,000GallonsCapacity TiltedConicalShape Approx.120ft.diameterat

    thetopand27ft.inheight 30ft.DiameterOculusat

    thebottomofthecone Concretedesignasopposed

    toStructuralSteeltodampentheinterferencewithsharkssensorysystem

  • PTConsiderationsConsiderations:

    P/Arequirements. 28thickTankWall

    (MainTank)and18Thickslab(AcclimationTank)

    VSLECI612Systemwith12ea.0.6dia.lowrelaxationstrandsformaintankandVSlab64systemforacclimationtank/maintankinterface

  • ProposedTendonlayout ComplexTendon

    Layout Acceptable

    locationsforstressingpockets

  • DesignCriteria Stressesbelow6fcperACI318. Minimumprecompressionof200psi. Concretestrength:

    At28days:5,000psi Atstressing:3,500psi

    Posttensioningsystems: ECI612withaneffectiveforceof420kipsintheGulfStreamtank.

    Vslab64withaneffectiveforceof140kipsintheAcclimationtank.

    Mildsteelreinforcementisaddedasneededtomeetstrengthrequirements.

  • DesignCriteriaLoadCombinations:A.ServiceLoadCombinations:

    A.1SustainedLoads:1SW+0.3LL+1PTA.2TotalLoad:1SW+1LL+1PT

    B.StrengthLoadCombinations:B.11.4SWB.21.2SW+1.6LL

    Where: SW:Selfweight LL:Liveload(waterpressure) PT:Loadduetoprestress

  • LoadingScheme Waterpressureisdeterminedat5differentwaterlevels:

    Level1

    Level2

    Level3

    Level4

    Level5

    WP1=62.43lb/ft3x28ft=1748.4lb/ft2 =12.13psi

  • LoadingScheme

    WP1 (12.13psi)

    WP2 (9.71psi)

    WP3 (7.28psi)

    WP4 (4.853psi)

    WP5 (2.13psi)

    WP6 (3.50psi)

  • Modeling Geometry28 Tank Wall

    ECI6-12 PT Tendons

    Columns

    56 Deep Ring Beam

    40 Deep Beam

    15 Acrylic Panel

    18 Acclimation Tank

    Level 4 slab

    Vslab6-4 PT Tendons

    ThetankismodeledusingSAP2000.

  • Modeling Tendonlayout

    Considerations: MeetP/A

    requirements: 420kips/(28xS)=0.200ksi75

    Achieveevenprestressdistributionthroughoutthetank.

  • ModelingTendonProfile ThetypicalCGSof

    thetendonsisatmiddepthofthetankwall.

    Layer A

    Layer B

    Layer C

    ACT Tendons

  • Modeling Connections1. AcrylicPanel&CircularBeam:

    Link:Itisazerolengthnonlinearlinkthattransferonlyx,yandztranslationreactionsfrompaneltobeam.

    AcrylicPanel RingBeam

    JointLink

  • Modeling Connections2.GulfStreamTank&Level4slab:

    A1gapisassignedbetweenbothstructuralelements,thusthereisnoconnectionbetweenthem.

    Level4slab GulfStreamTank

  • Modeling Connections3.GulfStreamTank&Level4slab&AcclimationTank:

    ThereiscontinuitybetweenalltheseelementsatthissideoftheGulfStreamtankonly.

    GulfStreamTank

    AcclimationTank

    Level4slab

  • Analysis&Results1.TopStressDiagram LoadCombination:DL+LL

    Allowablestresses:424psi

  • Analysis&Results2.BottomStressDiagram LoadCombination:DL+LL

    Allowablestresses:424psi

  • Analysis&Results3.TopStressDiagram LoadCombination:DL+PT

    Allowablestresses:424psi

  • Analysis&Results4.BottomStressDiagram LoadCombination:DL+PT

    Allowablestresses:424psi

  • Analysis&Results5.TopStressDiagram LoadCombination:DL+LL+PT

    Allowablestresses:424psi

  • Analysis&ResultsS11SHELLLOCALAXISSTRESSES:

  • Analysis&ResultsS22SHELLLOCALAXISSTRESSES:

  • Analysis&Results6.BottomStressDiagram LoadCombination:DL+LL+PT

    Allowablestresses:424psi

  • Deformation

  • Mapposttensioningtendonsontankwall. AssignthecorrespondingPTprofiletoeachtendonelement.

    Limitedcapabilityofthesoftwaretogeneratehyperstaticforcesandmoments.

    Challenges

  • Thankyou!