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

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The Dispersive Tension EquationAn equation relating tension to DWP responseThe “DTE” estimated tension with +/- 1 Std. Dev. (+/-8.0 K)
FDH Approach to <strong>Trunnion</strong> <strong>Rods</strong>• Non destructive to rods– Widespread lift-off not required (in general)– Load in rod never changes• Low risk to rods and personnel– Crews need only access to side of rods– Danger zone in front of rod avoided
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: Length (in)R. F. Henry DataResponse
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 and 58: • Rods also tested by“Listening
Page 59 and 60: West Point ResultsCollectedaccelera
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

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

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