Tall Building case studies - Tall Buildings: Structural Systems and Aerodynamic Form - page 148

The building's unique design had been made possible by a structural system which
is composed of corner cores consisting composite mega columns (shear walls) coupled
by steel link frames and steel Vierendeel frames coupling these cores ( Figure 4.39 ).
The two composite mega columns in corners consist of diagonally braced two vertical
steel H-section profiles encased in reinforced concrete. Each core, having two mega
columns with dimensions 1.2x7.5 m, is connected to the other with the 8-storey-deep
and 34 m spanning Vierendeel frames along the outside of the building ( Figure 4.39 ).
Besides connecting the corner cores, these frames provide the structure to span sky
gardens between the cores.
The two mega columns at each corner are connected to each other with steel
link frames. The members of this link frame are passing between the lift shafts and
they have a dimension of 1 m deep for vertical members and 1.1 m deep for beams
( Figure 4.39 ) .