Seismic analysis of double-layer spherical lattice shells with FPS bearings

The application of the Friction Pendulum System (FPS) to seismic isolation of lattice shell structures has been presented in this paper. Theoretical model of the FPS is first introduced. Equation of motions of lattice shell with FPS bearings is established. Then, seismic isolation studies are performed for double-layer spherical lattice shell structures subjected to three-component seismic excitations. Meantime, seismic isolation performance of the FPS is investigated under different earthquake inputs. The results show that this type of isolation bearing provides excellent property of seismic isolation and energy dissipation. Therefore, it is indicated that the FPS bearing can be effectively utilized to vibration control of spherical lattice structures.