Berkeley - Special Moment Resisting Frame Post Yield Behavior

The purpose of this experiment was to look at post yield behavior of an seismically isolated structure. The test specimen is a 2-story, 2-bay steel Special Moment Resisting Frame (SMRF) mounted on Triple Pendulum System (TPS) friction bearings. The specimen is subjected to a suite of ground motions scaled to different service levels (50% in 50 years, 10% in 50 years, 2% in 50 years). Post yield behavior is compared with unyielded behavior. Following the 2% in 50 year motions, a pre-selected ground motion was incrementally increased in order to cause impact of the isolation bearings.