2. Preliminary Design Ron Klemencic, P.E., S.E. President, Magnusson Klemencic Associates Presented by: John Hooper, P.E., S.E. Director of Earthquake Engineering, Magnusson Klemencic Associates

4. Structural Configuration Simple arrangement of structural elements Clearly defined load paths Complicated configurations and geometries complicate behavior—avoid to the extent possible

5. Changes in Building Stiffness and Mass System Configuration

6. Repositioning of Bracing Elements System Configuration

7. Multiple Towers on a Common Base System Configuration

8. Column Transfers and Offsets System Configuration

9. Gravity Induced Shear Forces System Configuration

10. Limited Connectivity of Floor Diaphragms System Configuration

11. Concentration of Diaphragm Demands System Configuration

12. Structural Performance Hierarchy Identify zone or elements of nonlinear response Establish hierarchy of the nonlinear elements Incorporate capacity design concepts as appropriate for remaining elements Confirm hierarchy through nonlinear response history analysis

13. WIDTH? Wind

14. WIDTH? Wind

15. Significantly Impact Shear and Flexural Demands Higher Mode Effects

17. Column Demands Due to Outrigger Over Strength Outrigger Elements

22. Design Base Shear

23. Serviceability Base Shears

24. One Rincon Hill Tower Core NLTHA LCI (High Gravity) Interstory Drift [Y-Direction, NW corner] Drift

25. Flexural Demands

26. Core Shear

27. Coupling Beam Rotations