Seismic response analysis of the suspension core-tube structure

This is the authors' abstract. We don't add key points for this paper.

Suspension structures have great artistic value and usable value. In this paper, the suspension core-tube structure is studied. Firstly, modal analysis of it and the frame core-tube structure as well as their base seismic isolation structures is carried out to explore the self-vibration characteristics and seismic isolation effect of the structures. Secondly, the nonlinear time-history analysis of the four structures under the action of rare earthquakes in the X, Y, and Z directions is carried out, and their inter-story drift angles, inter-story shear forces, base shear forces, maximum accelerations at the apex of the core-tube, and cantilever beam stresses are analyzed comparatively. Finally, the displacements and loads of the energy dissipators, the maximum horizontal displacements and tensile and compressive stresses of the seismic isolation bearings are analyzed to evaluate the performance of both of them under rare earthquakes. The results show that the frame core-tube structure and the suspension core-tube structure with base seismic isolation bearings can provide good control of their inter-story drift angles and internal forces, etc. The suspension core-tube structure is better than the frame core-tube structure in self-vibration characteristics and controlling the maximum acceleration response at the apex of the core-tube.