Influence of Turbulence, Orientation, and Site Configuration on the Response of Buildings to Extreme Wind
Figure 12
Spectral content of the cross-wind acceleration response: (a) -direction at 90°; (b) -direction at 360°. The turbulence effect in the -direction gave a high response as a result of a shorter separation bubble and earlier flow reattachment for , compared with smooth flow. On the other hand, the rectangular section with resulted in a high response in the -direction in smooth flow as well as in turbulent flow. The high response under the smooth flow is contributed basically by vortex shedding which occurs at a frequency of about 0.17 Hz (see Figure 11), closer to the second mode of vibration (0.21 Hz) than the third mode (0.34 Hz).
