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Bent 1 – Static Testing Program and Instrumentation

Bent 1 – Static Testing Program and Instrumentation. Hugo Escobar, Ali Morovat, and Sharon Wood Department of Civil, Architectural and Environmental Engineering University of Texas at Austin. Testing Program – Spring 2006. Overview Free-vibration response (modal hammer tests)

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Bent 1 – Static Testing Program and Instrumentation

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  1. Bent 1 – Static Testing Program and Instrumentation Hugo Escobar, Ali Morovat, and Sharon Wood Department of Civil, Architectural and Environmental Engineering University of Texas at Austin

  2. Testing Program – Spring 2006 • Overview • Free-vibration response (modal hammer tests) • Forced-vibration response (T-Rex) • Static lateral forces (T-Rex and Liquidator) • Additional Instrumentation for Static Tests • String potentiometers (lateral deflections) • Linear potentiometers (vertical deformation at ends of columns)

  3. Static Testing Program • Both static and dynamic tests were conducted to evaluate how the frequency response and damping of the bent varied with the level of damage in the soil, foundation, and structure • Lateral forces were applied using the winches attached to the front of T-Rex and Liquidator • Lateral forces were applied in both the east and west directions.

  4. Test Designation • Each test is numbered from 001 to 036. • Three types of tests were conducted: • Free-vibration tests • Forced-vibration tests • Static lateral forces • Displacement to the east is considered to be positive. T-Rex was used to pull the specimen to the east. Liquidator was used to pull the specimen to the west.

  5. Free-Vibration Test

  6. x z y Impact Locations for Modal Hammer Tests Project North Location B Location A 1W 1E

  7. Forced-Vibration Test(Tests 003-005) ~ 14 ft

  8. Forced-Vibration Test(Tests 013-015, Tests 028-029) ~ 22 ft

  9. Static Lateral Forces Project North Reference Frame Load Cell Load Cell 1W 1E Liquidator T-Rex ~ 50 ft ~ 50 ft Positive Displacements

  10. Static Lateral Forces(Pulling East)

  11. Static Lateral Forces(Pulling West)

  12. Load Cell and Pulley

  13. Pulley

  14. Load Cell

  15. Load Cell and Pulley

  16. External Reference Frame 6.75N 6.75S 81 in. (6.75 ft) 4.5 54 in. (4.5 ft) 3.0 36 in. (3 ft) 1.5 18 in. (1.5 ft) 0E 0W Base

  17. String Potentiometers 6.75N 6.75S 4.5 3.0 1.5 0W 0E

  18. String Potentiometers 6.75S 6.75N 4.5 3.0 1.5 0S

  19. Linear Potentiometers Column 1E Column 1W West West East East Top Top Top Top West West East East Bottom Bottom Bottom Bottom

  20. Column 1E West, Bottom Column 1W East, Bottom Column 1W West, Bottom

  21. Column 1E East, Top

  22. Back Row: Cecil Hoffpauir, Sharon Wood, Ali Morovat Front Row: Jun-Ki Lee, Francisco Romo de Vivar, Alsi Kurtulus, Farn-Yuh Menq, Hugo Escobar Not Pictured: Royce Owens, Eric Schell

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