Title

Seismic Performance of Multiple Tuned Mass Dampers in Suppressing Multi-Mode Responses of Building Structures

Abstract

Three mass-spring dampers were designed and fabricated to control the seismic responses of a 1/4-scale steel frame structure. The frequencies and damping ratios of the dampers and the structure were identified with free and forced vibration tests. The dampers with different combinations of springs and masses were installed on the structure for seismic response control. Parameters studied include the weight, frequency, and placement of the dampers. The sequential procedure developed in previous studies was applied to determine the sub-optimal locations of the dampers.

The structure was tested on a shake table under the modified 1940 El Centro and 1952 Taft Earthquakes whose dominant frequencies are equal to the fundamental frequency of the frame structure. Based on the experimental results, it was concluded that multiply tuned mass dampers are considerably superior to the conventional single mass damper in reducing the peak acceleration at lower floors. These dampers can also suppress the first peak response more effectively. The sequential procedure leads to a damper placement that outperforms others. The structure with the identified parameters was also analyzed numerically. The simulated responses of the structure under the base motion measured at the shake table are in good agreement with the experimental results.

Meeting Name

Smart Systems for Bridges, Structures, and Highways-Smart Structures and Materials (2001: Mar. 5-7, Newport Beach, CA)

Department(s)

Civil, Architectural and Environmental Engineering

Keywords and Phrases

Control Robustness; Multiple Tuned Mass Dampers; Numerical Simulation; Optimal Placement; Seismic Performance; Shake Table Test; System Identification; Acceleration; Computer Simulation; Earthquake Resistance; Steel Construction; Steel Structures; Structural Frames; Vibration Control; Tuned Mass Dampers (TMD); Damping

International Standard Serial Number (ISSN)

0277786X

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2001 SPIE--The International Society for Optical Engineering, All rights reserved.

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