Flexible Transfer Floor for Large Podium Multi-Towers

Abstract eng:
Large podium multi-towers are complex tall building structures. The problem of this structure is the interrelationship between the large podium and towers as well as between towers. Formerly it was usual to set a high strength and rigid transfer story on top of the large podium in order to transfer vertical loads and obtain effective relative fixity between the upper towers. For a flexible transfer floor using seismic-isolation rubber supports or viscoelastic dampers on top of the large podium, most of the seismic energy will be absorbed by the isolation floor and the transmission path of seismic energy will be cut off. The systematic earthquake impact is decreased in the case of a flexible transfer floor. In this paper, we set up seismic-isolation rubber supports or viscoelastic dampers on top of a large podium model and finite element analysis has been carried out, with preliminary discussion on the actual effect of setting up a flexible floor in the large podium multi-tower structure, FEM elastic-plastic analysis of the system and its comparison with a system without a transfer floor.

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