Seismic analysis of double-layer spherical lattice shell structures with FPS bearings under multi-component ground motions

The application of friction pendulum system(FPS) to seismic isolation of lattice shell structures is presented.Theoretical model of the FPS is first introduced.Motion equations of the lattice shell with FPS bearings are established.Then,seismic isolation studies are performed for double-layer spherical lattice shell structures subjected to both single and three-component seismic excitations.Meantime,seismic isolation performance of the FPS is investigated under different earthquake inputs.The results show that the isolation bearins provide the excellent properties of seismic isolation and energy dissipation.Therefore,the FPS can be effectively utilized to control the seismic response of the spherical lattice shell structures.