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

More documents

Recommendations

Info

Trunnion Anchor Rods
The Problem• Some Catastrophic Rod Failures• Loss of Pre-Stressing (grip nut slippage,relaxation, etc.)• Unknown Initial / Existing Tensions• Typical Solution = Mechanical Lift-Off• New Solution = Nondestructive Testing (NDT)by Dispersive Wave Propagation (DWP)
Page 1: Testing Post-Tensioned Steel Trunni
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 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
show all

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

Create successful ePaper yourself

Delete template?

Save as template?