1. Court of Appeals San Francisco CA Building Retrofitted with 256 Isolators of type Friction Pendulum System

2. Historic Monument Suffered Damage in 1989 Loma Prieta Earthquake

3. Installation of FPS Construction of Side Beams Cutting hole for jacks and column removal

4. Installation of damper Damper in place and grouted to receive load Cutting the wall along the building

5. Court of Appeals- Retrofit of Interior Walls Protected During Construction Interior After Retrofit

6. Ball-in-Cone Isolator - Tekton Dev., Arizona

7. Wire Rope Isolators

8. Elastomeric Bearing Models 2R t

9. Elastomeric Bearings Properties Horizontal Stiffness Vertical Stiffness t r = net rubber thickness A t Circular Bearing Square Pad Holed Circular Pad for strip for circular for square

10. Elastomeric Bearings Properties Moment Capacity of Circular Pad Effective Stiffness for Square Pad Effective Stiffness for Holed Pad Effective shear strain Effective Stiffness for Circular Pad (EI) eff = E c  R 4 /12

11. Modified Stiffness- Modified Stiffness for Large S Modified Stiffness for Very Large S For Circular Pad - Small S For Circular Pad Large S K - bulk modulus of material

12. Lead Rubber Bearings

13. Friction Pendulum System D WW Force Resistance Horizontal Stiffness Effective Stiffness Basic Period

14. Friction Pendulum System D WW

15. Design Procedure