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Dynamic/Seismic analysis of RC Element including shear effect

Dynamic/Seismic analysis of RC Element including shear effect. Fiber model with Stirrups. Stirrups. Concrete Beam. ys. yc. From Lateral Equilibrium:. 1.0. s 2. s 1. 0.8. 0.6. 0.5. s 1. 0.2. s 2. 0. 0. 1. 2. 3. 4. 5. Equivalent Uniaxial Stress: Rotating Crack Model. P.

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Dynamic/Seismic analysis of RC Element including shear effect

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  1. Dynamic/Seismic analysis of RC Element including shear effect

  2. Fiber model with Stirrups Stirrups Concrete Beam ys yc From Lateral Equilibrium:

  3. 1.0 s2 s1 0.8 0.6 0.5 s1 0.2 s2 0 0 1 2 3 4 5 Equivalent Uniaxial Stress: Rotating Crack Model P Stress/Strain Model In Principal Directions cracks Element in Principal Coordinate System Element in Cartesian Coordinate System

  4. UIUC Reinforced Concrete Squat Column • Material and Section Properties • Pier Height: 120 in • Concrete: 5930 psi • Longitudinal bar: 16-#8, Fy = 62 ksi • Spiral: #3, Fy = 75 ksi • Plastic hinge zone: 2.5 in spacing • Out of plastic hinge zone: 4.25 in spacing

  5. Shear Response UIUC Reinforced Concrete Squat Column (PIER1) • Shear Element is matching with the experimental data

  6. UIUC UIUC UIUC UIUC Reinforced Concrete Squat Column (PIER1) Reinforced Concrete Squat Column (PIER1) Reinforced Concrete Squat Column (PIER1) Moment Response Moment Response Moment Response UIUC • Shear Element is matching with the experimental data

  7. UIUC Reinforced Concrete Squat Column (PIER1) Axial Force Response • Shear Element is matching with the experimental data

  8. Shear Response UIUC Reinforced Concrete Squat Column (PIER2) • Shear Element is matching with the experimental data

  9. UIUC Reinforced Concrete Squat Column (PIER2) Moment Response • Shear Element is matching with the experimental data

  10. UIUC Reinforced Concrete Squat Column (PIER2) Axial Force Response • Shear Element is matching with the experimental data

  11. RC column by Bousias et al. (1995)

  12. Bousias Column Cyclic Comparisons

  13. Dynamic/Seismic Analysis of Shear-Critical Elements • Newmark Method • Constant Average Acceleration Method • Lumped Mass • Rayleigh Damping • Ground Acceleration/Dynamic Load

  14. Bousias ColumnEarthquake Response

  15. Bousias ColumnEarthquake Response

  16. # 3 Longitudinal Bars 6.5” 10 kips Loading 5” 6.5” 5” 20.25” Low - Moehle Beam Strong Axis Weak Axis

  17. Low - Moehle BeamMonotonic Comparisons

  18. Low - Moehle Beam Analysis by Spacone & Filippou

  19. Low - MoehleBeamEarthquake Response

  20. Low - MoehleBeamEarthquake Response

  21. 12’ Shell Region Core Region Transverse Reinforcement Longitudinal Reinforcement 2.5” Dia. 24” Dia. UMR Columns Monotonic

  22. UMR Columns Monotonic Comparisons • For 6 ft column, increase the ductile behavior by changing the stirrup from #3 bar to #4 bar.

  23. UMR Column Stirrup Strain 23

  24. 6’ • With Shear element is failing at 1”, whereas Bernoulli element is still continuing.. UMR Columns Cyclic Comparisons • With • With Shear element is failing at 1”, whereas Bernoulli element is still continuing.. Contd..

  25. UMR Columns Cyclic Comparisons 6’ Column

  26. UMR Columns Earthquake Response Displacement • 6ft column with shear has failed at initial times, where as others continued.

  27. UMR Columns Earthquake Response Resistance

  28. Fiber Element Development- Schedule & Deadline

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