Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

Numerical Simulations of Liquefaction Phenomena after Emilia Romagna (20 May 2012) Earthquake

623 views

Published on

Presentation made by Dr Davide Forcellini @ University of Porto during the OpenSees Days Portugal 2014 workshop

Published in: Engineering
  • Be the first to comment

  • Be the first to like this

Numerical Simulations of Liquefaction Phenomena after Emilia Romagna (20 May 2012) Earthquake

  1. 1. D. Forcellini, S. Gobbi and G. Guerra Università di San Marino davforc@omniway.sm Numerical simulations of liquefaction phenomena after Emilia Romagna (20 May 2012) earthquake
  2. 2. OPENSEES PL
  3. 3. INCOHERENT SOILS
  4. 4. INCOHERENT SOILS
  5. 5. COHESIVE SOILS
  6. 6. CASE STUDY
  7. 7. CASE STUDY
  8. 8. CASE STUDY
  9. 9. CASE STUDY
  10. 10. TRADITIONAL METHODS
  11. 11. TRADITIONAL METHODS (Youd and Perkins 1978)
  12. 12. CASE STUDY
  13. 13. CLAY MATERIALS
  14. 14. SAND MATERIALS
  15. 15. INPUT MOTION 0.16 0.15 0.14 0.13 0.12 0.11 0.10 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0.00 -0.01 -0.02 -0.03 -0.04 -0.05 -0.06 -0.07 -0.08 -0.09 -0.10 -0.11 -0.12 -0.13 -0.14 -0.15 -0.16 -0.17 Accelerogramma L1 0 2 4 6 8 10 12 14 16 18 20 Accelerazione (g) t (s)
  16. 16. FEM DEFINITION
  17. 17. BOUNDARY CONDITIONS
  18. 18. FINITE ELEMENTS
  19. 19. CALIBRATION (1558 nodes, 1224 elements) (1911 nodes, (825 nodes, 616 elements) 1520 elements)
  20. 20. CALIBRATION 100.0 90.0 80.0 70.0 60.0 50.0 40.0 30.0 20.0 10.0 0.0 EPP (5.55 m) 0 2 4 6 8 10 12 14 16 18 20 EPP (kPa) t (s) Mesh 01 Mesh 03 Mesh 04
  21. 21. CALIBRATION 0.05 0.05 0.04 0.04 0.03 0.03 0.02 0.02 0.01 0.01 0.00 TOP DISPLACEMENT 0 2 4 6 8 10 12 14 16 18 20 Top. Displ. (m) t (s) Mesh 01 Mesh 03 Mesh 04
  22. 22. 100.00 90.00 80.00 70.00 60.00 50.00 40.00 30.00 20.00 10.00 0.00 Excess Pore Pressure at 3.70 m 100.00 90.00 80.00 70.00 60.00 50.00 40.00 30.00 Excess Pore Pressure at 5.55 m 100.00 90.00 80.00 70.00 60.00 Excess Pore Pressure at 7.40 m 0 5 10 15 20 25 30 35 40 EPP (kPa) 50.00 t (s) 20.00 10.00 0.00 40.00 30.00 0 5 10 15 20 25 30 35 40 EPP (kPa) t (s) 20.00 10.00 0.00 0 5 10 15 20 25 30 35 40 EPP (kPa) t (s) RESULTS
  23. 23. 0.05 0.04 0.03 0.02 0.01 0.00 Top Lateral Displacement 0.05 0.04 0.03 0.02 0.01 Lateral Displacement at 3.70 m 0.05 0.04 0.03 0.02 Lateral Displacement at 5.55 m 0.05 0.04 Lateral Displacement at 7.40 m 0 5 10 15 20 25 30 35 40 Lateral Displacement (m) t (s) 0.00 0.01 0.03 0.02 0 5 10 15 20 25 30 35 40 Lateral Displacement (m) t (s) 0.00 0.01 0 5 10 15 20 25 30 35 40 Lateral Displacement (m) t (s) 0.00 0 5 10 15 20 25 30 35 40 Lateral Displacement (m) t (s) RESULTS
  24. 24. RESULTS
  25. 25. RESULTS (scale 1:150)
  26. 26. SSI STUDIES (future research)
  27. 27. CYCLIC TP
  28. 28. RESULTS (scale 1:10)
  29. 29. REFERENCE
  30. 30. D. Forcellini, S. Gobbi and G. Guerra Università di San Marino davforc@omniway.sm THANK YOU! davforc@omniway.sm

×