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Analysis of Test Results

Analysis of Test Results. What we’ll have to do:. Load-Deflection curve. Load Vs Strain curve for steel and concrete Find yield load ( e s = 0.002) for flexural rebar and strain at failure load for concrete and rebar. First yield load for flexural reinforcement. Ductility of the slab.

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Analysis of Test Results

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  1. Analysis of Test Results

  2. What we’ll have to do: • Load-Deflection curve. • Load Vs Strain curve for steel and concrete • Find yield load (es = 0.002) for flexural rebar and strain at failure load for concrete and rebar. • First yield load for flexural reinforcement. • Ductility of the slab. • Energy absorption. • Deflection profile.

  3. Calculate flexural strength and Punching shear capacity of the slab. • Compare test result with predicted result. • Show a photograph depicting the crack pattern at failure. • Make comment on the mode of failure of the slab.

  4. T5 T2 T4 T1 1900 T3 Tension Reinforcement and Strain gauges arrangement 1900 T1(1050,845);T2(1260,1020);T3(1460,845);T4(1590,1020);T5(810,1080)

  5. C7 C6 C8 C9 Compression Reinforcement and Strain gauges arrangement C6(820,770); C7(1090,820); C8(820,580); C9(820,400)

  6. 5 3 1 2 4 30, 70, 100, 100 Concrete Strain gauge locations

  7. Load-Deflection curve

  8. Load-Deflection curve

  9. Load-Deflection curve

  10. Load vs Strain curve for steel and concrete

  11. Load vs Strain curve for steel and concrete

  12. Load vs Strain curve for steel and concrete

  13. Load vs Strain curve for steel and concrete

  14. Load vs Strain curve for steel and concrete

  15. Load vs Strain curve for steel and concrete

  16. 100 KN 150 KN 200 KN Steel Strain Distribution

  17. 50 KN 100 KN 150 KN 200 KN Concrete Strain Distribution

  18. Find yield load (es = 0.002) for flexural rebar and strain at failure load for concrete and rebar. • First yield load for flexural reinforcement.

  19. Ductility and Energy Absorption of the Slab Ductility = Ratio of the deflection at 25% of maximum load (after reaching the maximum load) to the deflection at the first yielding of flexural reinforcement. Energy Absorption = Area under the load deflection curve up to 25 % maximum load (after reaching the maximum load)

  20. Ductility and Energy Absorption of the Slab

  21. Deflection Profile 1 division = 0.01 mm 1 cycle = 1 mm

  22. Calculation of Flexural strength

  23. Calculation of Punching Shear Capacity

  24. Compare Test result with Predicted result

  25. Show a photograph depicting the crack pattern at failure and Make comment on the mode of failure of the slab If   1 , Flexural failure If   1 , Punching Shear failure   From crack pattern Make comment on mode of failure

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