The Effect of Tuned Mass Damper Location on its Performance in MDOF Structures

Subject Areas : Analysis of Structure and Earthquake

morteza baigoly ¹ , Farzan Hadad Shargh ² , Fayaz Rahimzadeh Rofooei ³

1 - Ph.d student Department of College of Civil Engineering, West Tehran Branch, Islamic Azad University, Tehran, Iran.
2 - Department of College of Civil Engineering, West Tehran Branch, Islamic Azad University, Tehran, Iran.
3 - Department of Civil Engineering, Sharif University of Technology, Tehran, Iran.

Received: 2020-11-14 Accepted : 2021-08-28 Published : 2021-08-23

Keywords: Time History Analysis, Tuned mass dampers, Control of structures, Damper location, MDOF systems,

Abstract :

The use of single or multiple tuned mass dampers is one of the methods to reduce earthquake vibrations caused by earthquakes in recent decades. One of the problems with using mass dampers is the large amount of space occupied by these systems in the structures. This space can sometimes make a lot of trouble for structural architects. The results of previous researches indicate that the dampers tuned on the first mode of the structure located on the roof floor, exhibit the highest efficiency. However, in some structures, due to architectural limitations, their implementation on the roof floor becomes problematic and it is appropriate to place dampers on other floors of the structure. In this research, the effect of damper placement on different floors of structures on their performance will be investigated under time history analysis. For this purpose, three structures of 5, 15, and 25 stories are designed and mass dampers are provided for each of them. These dampers are then placed on different floors of the structure and are analyzed. The results of this study present that the relocation of dampers has regulatory influences on the performance of dampers. These effects can be predicted in the form of an equation obtained in this study.