Seismic response control of asymmetric buildings using tuned mass dampers

Abstract

Summary The aim of the present study is to investigate the efficiency of the torsional tuned mass dampers (T‐TMDs) in response control of asymmetric buildings under bidirectional earthquake ground excitations. The efficiency of the T‐TMDs is compared with bidirectional tuned mass dampers (BTMDs). The T‐TMDs are oriented to the rotation of the structures about vertical axis with a single torsional mass attached to spring–dashpot elements, whereas the BTMD connects a single mass to two orthogonal sets of spring–dashpot elements oriented to principal axes of the building. The buildings are idealized three‐dimensional models with two translational and one torsional degrees of freedom for each floor. Three different configurations (cruciform‐shaped, L‐shaped, and T‐shaped) of multistory buildings are considered. The 5‐, 15‐, and 20‐story buildings with and without the tuned mass damper schemes are subjected to bidirectional earthquake ground excitation. In order to evaluate the effectiveness of the T‐TMDs and BTMD, the rotation, displacement, acceleration, and base shear force responses are computed. Parametric studies are conducted for all the configurations installed with the T‐TMDs and BTMD by varying their mass ratio, damping ratio, and ground motions. It is concluded that the T‐TMDs are more effective in mitigating the torsional response of asymmetric buildings as compared with the BTMD.

Optimal design and seismic performance of Multi‐Tuned Mass Damper Inerter (MTMDI) applied to adjacent high‐rise buildings

“…Since Frahm [ 14 ] pioneering concept of vibration absorber device, a numerous amount of other semi‐active and passive tuned control devices have been proposed. The most prominent among them include the tuned mass damper (TMD), [ 15–25 ] the active tuned mass damper (ATMD), [ 26,27 ] the multi‐tuned mass damper (MTMD), [ 28–31 ] the tuned liquid column damper (TLCD), [ 32,33 ] the rotational inertia dampers, [ 34 ] and the magnetorheological dampers (MR). [ 35–37 ] The effectiveness of the TMD over other structural control systems can be attributed to its reliability and its low maintenance cost.…”

Torsional control of asymmetric buildings using online 3‐D damage detection and adaptive stiffness devices

“…[2][3][4] Using the control strategy of structures to prevent damage or reduce its value is also a good solution to this problem. 5,6 In this context, various passive control equipment, including tuned mass dampers, [7][8][9][10][11][12][13][14] viscous dampers, [15][16][17][18] and base isolations [19][20][21][22] have been applied to reduce the effects of torsion in the asymmetric structures. Also, dynamic responses of asymmetric structures have been significantly reduced by the use of different equipment and methods of active [23][24][25][26][27] and semi-active [28][29][30] control strategies.…”

Seismic behavior of highly irregular structures with multiple passive energy dissipation system: Case study of a single‐column elevated station

“…For irregular structures, Goel conducted a case study for a one‐story asymmetric frame, and the influence of viscous dampers on the seismic behavior of horizontally irregular structures was studied intensively. Following his work, the effectiveness of frictional, viscoelastic, and tuned mass dampers in asymmetric systems was explored . Meanwhile, other researchers have emphasized on PED systems for vertically irregular structures, such as the multistory building structure with weak stories or uneven mass distribution caused by staggered floors, slabs with large openings, or heavy machineries.…”