Critical Analysis Of Vertical Tall Buildings

Abstract

Wind induced structural responses, including pressure, are directional dependent. First win speed will not be uniform in all directions. Second the shape and structural properties of the structure will not be axi -symmetric. Consideration of the directionality effect will help to achieve an economical and safe design of structure The wind pressure acting on individual units of a structure can be determined using the pressure coefficient which depends on the overall dimensions of the structure as well as the openings present in the walls of the structure. The numerical example considered in this chapter illustrates the determination of static wind loads by both force coefficient and pressure coefficient methods. Dynamic along-wind analysis procedures using Random Vibration Analysis and codal provisions explained in this paper. For the purpose of along-wind analysis of the structures by the analytical procedure based on random vibration analysis, a FORTAN program was developed. For this purpose, t hree structures have been considered, out of which, two are buildings and one is a chimney. The output of the program is the response of the structure in terms of mean response, peak factor, standard deviation of fluctuating response along the height of the structure.