Innovative Structural Concept & Solution for Mega Tall Buildings Applied to One Kilometer Skyscraper

Abstract

Structural systems for tall buildings have undergone dramatic changes since the demise of the conventional rigid frames in the 1960s as the predominant type of structural system for steel or concrete tall buildings. Generally, the structural systems of tall buildings are considered to be two types. One is interior and the other one is exterior type. The frame tube buildings have been the most efficient structural system used for building which is in the range of 40-100 stories. In the early 1970s, Fintel (1974) indicated that properly designed structural walls could be used effectively as the primary lateral-load resisting system for both wind and earthquake loading in multistory buildings. This study is intended to model an advanced structural system for tall buildings. In this innovative concept, several parallel shear walls have been arranged in both directions and connected with beams and R.C. floor slabs. The shear walls are continuous down to the base to which they are rigidly attached to form vertical cantilevers. Their high in plane stiffness and strength make them well suited for bracing buildings up to about 278 stories. Also it is found by research that, when this structural arrangement is applied to around 830 meter tall structure with aspect ratio 8.14:1, no additional structural supporting system is required. This shear walls arrangement is applicable for the tall buildings of any height to avoid additional supports to resist the lateral forces while taking advantage of the creative approach of this unique concept.