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SUPPORTING SLIDES

SUPPORTING SLIDES. Rigid and Flexible Assumption. Quick Release Mechanism. Load Cell. Zero load. 250 lb. 500 lb. Full load. Load cell connection. Lvdt and Dial gage. Cable and load cell. Typical LVDT Record. Typical Accelerometer Record. New Mix: G1 Series. New Mix: G2 Series.

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SUPPORTING SLIDES

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  1. SUPPORTINGSLIDES

  2. Rigid and Flexible Assumption

  3. Quick Release Mechanism

  4. Load Cell Zero load 250 lb 500 lb Full load

  5. Load cell connection

  6. Lvdt and Dial gage

  7. Cable and load cell

  8. Typical LVDT Record

  9. Typical Accelerometer Record

  10. New Mix: G1 Series

  11. New Mix: G2 Series

  12. More cylinders: EC,ASTM 32

  13. Compressometer Compressometer: ELE International Dial gage: Federal: Model C2I (0.0001 in) Machine: Forney Model F-60C-DFM/1 Year 1999

  14. Stresses in Free Vibration Test

  15. Stresses in Free-Vibration Tests

  16. Idealized Stress vs Strain

  17. 2.09 1.98 86 79 α for Ec= 3800 ksi α 2D Frame Analysis Exterior Frames Interior Frames 0.9 0.85

  18. 2.09 1.98 86 79 3D Model with Ec= 5000 ksi

  19. Assumption details f and k for Ec= 3800 ksi Error= 15-25% Error= 20-40%

  20. Assumption detailsf and k for Ec 50% Larger Error= 3-7% Error= 4-18%

  21. Stresses in the pluck-test Total Weight: 440 kips Stresses at the the columns: 440/(6*18*18)=225 psi Stresses due to lateral load (2 kips): 40 psi Total stresses: 265 psi Stress/fc’ ≈ 0.06 (1/15)

  22. Mass Calculation Plain Concrete: 142 lb/ft3 MATERIALS Steel: 490 lb/ft3 COLUMNS PLATES

  23. SAP2000 Thin Plate Vs. Thick Plate “Shearing deformations tend to be important when the thickness is greater than about one-tenth to one-fifth of the span. They can also be quite significant in the vicinity of bending-stress concentrations, such as near sudden changes in thickness or support conditions, and near holes or re-entrant corners. Even for thin-plate bending problems where shearing deformations are truly negligible, the thick-plate formulation tends to be more accurate, although somewhat stiffer, than the thin-plate formulation. However, the accuracy of the thick-plate formulation is more sensitive to large aspect ratios and mesh distortion than is the thin-plate formulation. It is generally recommended that you use the thick-plate formulation unless you are using a distorted mesh and you know that shearing deformations will be small, or unless you are trying to match a theoretical thin-plate solution”. SAP2000 Analysis Reference

  24. Cracks on the building

  25. UCLA Flat-Plate Structure

  26. 4.3 4.3 17.5 17.5 UCLA Flat-Plate Structure 9% 23% 8% 20%

  27. Modified Compressometer

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