Design of Amplified Structural Damping Using Optimal Considerations
Publication: Journal of Structural Engineering
Volume 129, Issue 10
Abstract
A method is suggested to reduce the structural seismic response using viscous dampers with their effect magnified with mechanical levers (lever arms). The lever arms are used to magnify the drift and the drift velocities transferred from the structure to the dampers thus producing larger energy dissipation in smaller devices. The increase of energy dissipation in each unit results in a reduction of the number of units necessary to achieve the same reduction in structural response, or it results in a reduction of the size of dampers required for the same purpose. The use of the proposed technique permits one to reduce the number of frame bays obstructed by diagonal or Chevron bracing elements. An optimal design procedure, based on the linear quadratic regulator (LQR) technique, is proposed in this study to obtain the initial properties of the viscous dampers. The study presents the amplification and the contribution of the construction details to such amplification. A seven-story structure model with the proposed system was simulated numerically in order to check the damping efficiency. The numerical example shows that using the lever arms for dampers’ connection, it yields significant reduction in the structural response, very close to that designed according to the LQR strategy.
Get full access to this article
View all available purchase options and get full access to this article.
References
Aiken, I. D., and Kelly, J. M. (1996). “Cyclic dynamic testing of fluid viscous dampers.” Proc., 4th Caltrans Seismic Research Workshop, California Dept. of Transportation, Sacramento, Calif.
Constantinou, M. C., Soong, T. T., and Dargush, G. F. (1998). Passive energy dissipation systems for structural design and retrofit, Monograph series, MCEER, Buffalo, N.Y.
Constantinou, M. C., and Symans, M. D. (1992). “Experimental and analytical investigation of seismic response of structures with supplemental fluid viscous dampers.” Tech. Rep. No. NCEER-92-0027, State Univ. of New York at Buffalo, Buffalo, N.Y.
Constantinou, M. C., Tsopelas, P., Hammel, W., and Sigaher, A. N. (2000). “New configurations of fluid viscous dampers for improved performance.” Proc., Passive Control Symp., Tokyo Institute of Technology, Yokohama, Japan.
Constantinou, M. C., Tsopelas, P., Hammel, W., and Sigaher, A. N.(2001). “Toggle-brace-damper seismic energy dissipation systems.” J. Struct. Eng., 127(2), 105–112.
Gluck, N. (1996). “Active and passive control of panel walls in tall buildings for earthquake effects.” PhD dissertation, Technion—Israel Institute of Technology, Haifa, Israel.
Gluck, N., Reinhorn, A. M., Gluck, J., and Levy, R.(1996). “Design of supplemental dampers for control of structures.” J. Struct. Eng., 122(12), 1394–1399.
Gluck, J., and Ribakov, Y.(2000). “Semi-active friction system with amplifying braces for control of MDOF structures.” Struct. Des. Tall Build., 10(2), 107–120.
Hanson, R. D., Aiken, I. D., Nims, D. K., Richter, P. J., and Bachman, R. E. (1993). “State-of-the-art and state of the practice in seismic energy dissipation.” Proc., Seminar on Seismic Isolation, Passive Energy Dissipation and Active Control, Vol. 2, Applied Technology Council, 449–472.
MATLAB. (1993). High performance numeric computation and visualization software. User’s guide, The Math Works Inc., Natick, Mass.
Reinhorn, A. M., Li, C., and Constantinou, M. C. (1995). “Experimental and analytical investigation of seismic response of structures with supplemental damping: Part I Fluid viscous damping devices.” Technical Rep. No. NCEER-95-0001, State Univ. of New York at Buffalo, Buffalo, N.Y.
Ribakov, Y. (2000). “The influence of dampers on earthquake response of tall buildings.” PhD dissertation, Technion—Israel Institute of Technology, Haifa, Israel (in Hebrew).
Ribakov, Y., Gluck, J., and Gluck, N. (2000). “Practical design of MDOFstructures with supplemental viscous dampers using mechanical levers.” Proc., ASCE Specialty Conf. on Probabilistic Mechanics and Structural Reliability, ASCE, Reston, Va.
Soong, T. T. (1990). Active structural control: theory and practice, Wiley, New York.
Soong, T. T., and Dargush, G. F. (1997). Passive energy dissipation sys-tems in structural engineering, Wiley, Chichester, U.K.
Taylor, D. P. (2000). “Toggle brace dampers: A new concept for structural control.” Advanced technology in structural engineering: Proc., 2000 Structures Congress and Exposition (CD-ROM), ASCE, Reston, Va., Section 3, Chap. 3.
Whittaker, A., and Constantinou, M. (2000). “Fluid dampers for building construction.” Proc., Passive Control Symposium, Tokyo Institute of Technology, Yokohama, Japan.
Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 129 • Issue 10 • October 2003
Pages: 1422 - 1427
Copyright
Copyright © 2003 American Society of Civil Engineers.
History
Received: Oct 10, 2001
Accepted: Nov 19, 2002
Published online: Sep 15, 2003
Published in print: Oct 2003
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.