Seismic response control of asymmetric buildings using tuned mass dampers

authored by

Ahmad Edris Taha, Said Elias, Vasant Matsagar, Arvind Kumar Jain

Abstract

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.

External Organisation(s)

Indian Institute of Technology Delhi (IITD)
University of Iceland

Type

Article

Journal

Structural Design of Tall and Special Buildings

Volume

28

ISSN

1541-7794

Publication date

25.12.2019

Publication status

Published

Peer reviewed

Yes

ASJC Scopus subject areas

Civil and Structural Engineering, Architecture, Building and Construction

Electronic version(s)

https://doi.org/10.1002/tal.1673 (Access: Closed)