A new seismic isolation system using
hemispherical sliding bearings to steel pipe pile
foundation is proposed for the design of a house.
Experiments were performed on model structures of a
house with and without the bearings. With the bearings,
the vibration of its roof was lower than that without the
bearings, while an unexpected increase in vibration
occurred on its floor. Detailed analyses identified that
stick-slip occurred at the contact interfaces of the
bearings and caused the increase in vibration.