Bidirectional Mass Platform (Old idea)

1. Seismic Simulation and Design of Bridge Columns Under Combined Actions and Implication on System ResponseUniversity of Nevada, RenoDr. David H. Sanders Juan Arias-AcostaJan. 23 - 2009

2. Bidirectional Mass Platform (Old idea)

3. Bidirectional Mass Platform (Old idea)

4. Bidirectional Mass Platform (New idea)

5. Bidirectional Mass Platform (Without PD)

6. Bidirectional Mass Platform (PD system)

7. Bidirectional Mass Platform (With PD)

8. Circular Columns (Design Parameters)

9. Circular Columns Details (Single Curvature)

10. Circular Columns Construction

11. Interlocking Columns Details

12. Interlocking Columns Construction

13. Interlocking Spiral Columns (Design Parameters)

14. Analytical Model (OpenSees) Additional mass Rigid links Corotational Truss Ele. Rigid links Point Mass Elastic Beams Zerolength Element. Beam with Hinges Frame Element. Frame Element. Rigid link

15. Analytic model (OpenSees) Mass=80 kips Axial load with unbonded tendon aprox. 80 Kips Torsional stiffness 0.2JG Biaxial motions El Centro: 0.33, 0.66, 1.0, 1.5, 2.0, 2.5, 3.0 Sylmar: 0.2, 0.4, 0.6, 0.8, 1.0, 1.2, 1.4, 1.6 Kobe: 0.3, 0.6, 0.9, 1.2, 1.5, 1.8 Mendocino (Petrolia): 0.2, 0.4, 0.6, 0.8, 1.0, 1.2, 1.4Northridge (Sepulveda): 0.2, 0.4, 0.6, 0.8, 1.0, 1.2, 1.4 Model 1: Mass frame, without axial load, without PD. Model 2: Mass frame, with unbonded tendon, with PD.

16. Mass Distribution (Plan view) 17 k 19.83 k 8.5 k 17 k 19.83 k 19.83 k 19.83 k 8.5 k 19.83 k 19.83 k 17 k 17 k 19.83 k 19.83 k 19.83 k 19.83 k 8.5 k 8.5 k 19.83 k 19.83 k Case 4 Case 2 Case 5 Case 3 Case 1

17. Analysis Results (circular column)

18. Analysis (Mendocino-Case1)

19. University of Nevada Large Scale Structures Laboratory Test Schedule