Testing Post-Tensioned Steel Trunnion Rods for the U. S. Army ...

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Modeling <strong>the</strong> <strong>Rods</strong>2-D, 3D (future) Beam Finite Element Model of RodSimple supports at face of trunnion beam and far endAdditional rotational springsTension between supports onlyDispersive Data AnalysisStrike with a HammerThe Wave
West Point ResultsCollectedacceleration timehistories ofimpactsUse DWP to findresponse contentIdentify first dominantmodes of motion2.5 x 104 21.510.50-0.5-1-1.5-2-2.50 0.5 1 1.5 2 2.5Ti ( )10 410 310 210 110 010 -110 -210 -310 -1 10 0 10 1 10 2 10 3 10 4
Page 1 and 2:
Testing Post-Tensioned Steel Trunni
Page 3 and 4:
The Problem• Some Catastrophic Ro
Page 5 and 6:
Background on the Testing Method•
Page 7 and 8: The Nondestructive Field Testing“
Page 9 and 10: Accessibility Issues
Page 11 and 12: Tackling AccessibilityEach rod had
Page 13 and 14: Allows for modeling ofmany damconfi
Page 15 and 16: DWP Response with TensionRobert F.
Page 17 and 18: DTE Results - West Point, GA+ 8.6 k
Page 19 and 20: Greenup, KY104 rods testedIdentifie
Page 21 and 22: Thank You !
Page 23 and 24: Greenup ResultsMost rods ~50 Hz10 3
Page 25 and 26: Trunnion Assembly ResultsRod typica
Page 27 and 28: Results - Trunnion PrototypeMany te
Page 29 and 30: Liftoff Tests Results• West Point
Page 31 and 32: Length (in)R. F. Henry DataResponse
Page 33 and 34: FDH Approach to Trunnion Rods• No
Page 35 and 36: Current Approach• Measure all rod
Page 37: Thank you
Page 44: Greenup Rods• Grip nut integralwi
Page 47 and 48: Slipped Grip Nuts at R. F. Henry•
Page 49 and 50: West Point Dam
Page 51 and 52: Greenup, KY Dam
Page 53 and 54: R. F. Henry Trunnion Rods21 rods pe
Page 55 and 56: Lift-Off TestsOn site practice lift
Page 57: • Rods also tested by“Listening
Page 61 and 62: R. F. Henry DamR. F. Henry rods hav
Page 63 and 64: Greenup Trunnion Rods52 rods per gr
Page 65 and 66: West Point ResultsObserved response
Page 67: Trunnion Anchor Rod AssemblyTransfe
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Testing Post-Tensioned Steel Trunnion Rods for the U. S. Army ...

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