Title

Optimal Placement of Multiple Tune Mass Dampers for Seismic Structures

Abstract

Effects of a tuned mass damper on the modal responses of a six-story building structure are studied first to demonstrate the damper's ineffectiveness in seismic applications. Multistage and multimode tuned mass dampers are then introduced. Several optimal location indices are defined based on intuitive reasoning, and a sequential procedure is proposed for practical design and placement of the dampers in seismically excited building structures. The proposed procedure is applied to place the dampers on the floors of the six-story building for maximum reduction of the accelerations under a stochastic seismic load and 13 earthquake records. Numerical results show that the multiple dampers can effectively reduce the acceleration of the uncontrolled structure by 10-25% more than a single damper. Time-history analyses indicate that the multiple dampers weighing 3% of total structural weight can reduce the floor acceleration up to 40%. The multiple dampers can even suppress the peak of acceleration responses due to impulsive excitations, which a single damper of equal mass cannot achieve.

Department(s)

Civil, Architectural and Environmental Engineering

Keywords and Phrases

Earthquake Effects; Impulse Response; Numerical Analysis; Oscillators (Electronic); Random Processes; Tall Buildings; Time Series Analysis; Vibration Control; Tune Mass Dampers (TMD); Damping

International Standard Serial Number (ISSN)

7339445

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2001 American Society of Civil Engineers (ASCE), All rights reserved.

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