application of a distribution of tmds located on upper floors of tall buildings that are tuned to their first mode in increasing their performance

 

this paper investigates an application of a distribution of tmds located on upper floors of tall buildings that are tuned to their first mode in increasing their performance. a number of 3d steel moment resisting frames with one level of eccentricities in orthogonal directions are considered. two model of structures 15 story with rigid base are designed. we put tmd at the center of rigidity of the roof in first case. then we put another one at lower story for each structure till about third of height. for example for 15 story structure, we put tmd at (15, 14-15, 13-14-15, 12-13-14-15) floors respectively. these models are subjected to a number of onedirectional horizontal ground motions according to soil type. extensive parametric studies carried out to investigate the performance of tmds in controlling the nonlinear seismic- induced response of the structural models. drift ratio, story accelerations and the maximum displacement of roof level for each structure are considered for comparison purposes. the opensees program is used for the required numerical analyses.