Design approaches against wind excitation - Tall Buildings: Structural Systems and Aerodynamic Form - page 163

Figure 6.10 The Petronas Twin Towers, aerodynamic top
(courtesy of Antony Wood/CTBUH)
Figure 6.11 Shanghai World Financial Center, aerodynamic top
(courtesy of Niels Jakob Darger)
Aerodynamic architectural modifications
Aerodynamic architectural modifications consist of corner modifications that do not
significantly alter the existing architectural design. Modifications to corner geometry
by means of recessed/notched, cut, slotted and rounded corners reduce the across-
wind building response, as compared with an original building shape with sharp
corners.
In a prismatic building, recessed (notched), cut, slotted and rounded corners
( Figure 6.12 ) can reduce the along-wind and across-wind building response to an