Compensation Method of Differential Deformation for Vertical Members of Super High-rise Buildings Considering Time-dependent Effects

Abstract:

Aiming to reduce the differential deformations between frame columns and core tubes in super high-rise buildings， a synchronous grouping compensation method is proposed， which considers the time-dependent effects of concrete and the influence of construction process. In this method， frame columns and core tubes are synchronized grouped and compensated by setting the allowable value of the elevation difference. In addition， the proposed grouping compensation method is applied to the elevation compensation of the Tianjin Building 117 The analytical results show that the vertical deformation of frame columns and core tubes under the effect of long-term shrinkage and creep exceeds 30% of the total deformation， and the proportion increases with time. Besides， the proposed method can limit the elevation difference of the vertical components themselves and their relative elevation difference within the allowable value， which can effectively reduce the additional internal force of the components caused by the time dependent effects.

Key words:super high-rise building;elevation deviation;elevation compensation;shrinkage;creep