Seismic Performance of Multiple Tuned Mass Dampers in Suppressing Multi-Mode Responses of Building Structures
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.
G. Chen and J. Wu, "Seismic Performance of Multiple Tuned Mass Dampers in Suppressing Multi-Mode Responses of Building Structures," Proceedings of the Smart Systems for Bridges, Structures, and Highways-Smart Structures and Materials (2001, Newport Beach, CA), vol. 4330, pp. 460-470, SPIE--The International Society for Optical Engineering, Mar 2001.
The definitive version is available at http://dx.doi.org/10.1117/12.434146
Smart Systems for Bridges, Structures, and Highways-Smart Structures and Materials (2001: Mar. 5-7, Newport Beach, CA)
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)
Article - Conference proceedings
© 2001 SPIE--The International Society for Optical Engineering, All rights reserved.