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Abstract:
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One of the principal loads acting on above-ground structures is that due to wind. In tall structures, say above 100 feet high, often the wind forces become the controlling factor in structural design. In such tall structures economy in design is achieved by a correct assessment of the wind profile (wind speed variation with height)- The wind forces acting on a structure are a function of the square of the wind speed. Therefore, a good knowledge of the wind profile which defines the variation of wind speed is essential for appropriate assessment of the wind forces. Among the variables for wind profile are the height above ground, the roughness of terrain, the intensity of wind speed and the averaging time of the mean wind speed. |