How Straddling Pendulum Seismic Isolation Base works to protect a structure against earthquake forces The principal of base isolation is to change the "swing" frequency (fundamental frequency) of the building. We want to make the building take longer to sway back and forth, because we want to misalign the fundamental frequency of the structure with the peak frequency of the EQ. Most EQs deliver the highest force in the 1 cycle/sec range. So if we make the building take much longer, say 4 seconds

35K views · 401 reactions | Friction Pendulum Systems (FPS)，Sliding...

4.1K views · 222 reactions | Tests undertaken with the ‘pendulum...