Crosswind response of tall building under wind load in time and frequency domains

Due to the progress in the construction technology, the height of buildings has risen and the weight of them has declined; therefore, affected structures increase against the wind load as fundamental periods of structures increase. Responses of tall buildings are important in crosswind under the turbulent component of wind loads, which will be more important when the side ratio is larger than one. Three tall buildings have been simulated for effects of the wind load in the time and frequency domain. Wind field in time domain has been simulated with the probabilistic approach. Regarding, the frequency domain, wind forces obtained from the wind tunnel at the university of Notre Dame have been used. Story displacement and story shear are critical parameters to evaluate the structural behavior; thus, the results of wind characteristics were compared in the form of them. Moreover, the base moment coefficient is another parameter for comparing wind loads obtained from the wind tunnel and the probabilistic approach. The results reveal that transverse displacements of models under the wind load are larger than longitudinal and the result of the story shear is reversed. Crosswind displacements under the wind load are compared for loading in two domains of time and frequency. There is a good agreement for these two methods for the gust load in transverse direction.