Design approaches against wind excitation - Tall Buildings: Structural Systems and Aerodynamic Form - page 156

design aPProaches againsT wind
exciTaTion
At every step that tall building design takes toward the sky, today's architects and
engineers encounter new difficulties. As the height of modern skyscrapers rises with
developments in the field of structural system design and the use of high-strength
materials, their weight and rigidity decrease, and their slenderness and flexibility -
and thus their sensitivity to wind loads - increase. Wind loads, which cause large
lateral drift, play a decisive role in the design of tall buildings and can be even more
critical than earthquake loads. As a result, the wind loads and lateral drift to which tall
buildings are subject have become an important problem ( Figure 6.1 ).
Design approaches for controlling wind-induced building sway in tall buildings
and protecting serviceability can be divided into three main groups, the “architec-
tural design approach”, the “structural design approach” and the “mechanical design
approach” and their respective subgroups.
developments in the field of structural system design
and
use of high-strength materials
decreasing building weight and rigidity
increasing building slenderness and flexibility
increasing building sensitivity to wind loads
Figure 6.1 Tall buildings and the increasing building sensitivity to wind loads