Seismic response analysis of single layer lattice shell with FPS

To study the effect of friction pendulum bearing (FPB) on seismic performance for reticulated shell structure, the solid model of FPB was established by the LS-DYNA finite element software. The vibration isolation mechanism of FPB was analyzed and the correctness of the model was verified. The mechanical properties of single-layer spherical lattice shell with FPB and hinged support were compared under the static condition. Results showed that application of FPB made the initial deformation of reticulated shell structure increase. On the basis, different ground motions were acted on the reticulated shell structure. The dynamic response characteristics of shell were analyzed in three aspects including axial force of bars, acceleration and relative displacement of nodes. The effectiveness and adaptability of FPB were verified. With the increase of earthquake intensity, the number of bars whose axial force reduced and the number of nodes whose acceleration and relative displacement reduced were increased. Finally, seismic response of single layer spherical latticed shells with outer strengthened ring bars was researched and the effect of outer strengthened ring bars on the structural seismic performance was discussed.