Optimal Design of Base‐Isolated Structures with Dynamic Absorbers
Publication: Journal of Engineering Mechanics
Volume 120, Issue 2
Abstract
In this study, a passive control system has been proposed to protect structures from earthquake damages. In particular, the influence of an absorber on the dynamics of base‐isolated structures has been investigated in detail. Two different types of base‐isolation systems have been considered. These include rubber‐bearing and sliding‐friction isolators. The base isolators are represented by hysteretic models. The absorber consists of a linear spring mass attached to the base. Simulation studies were conducted for various models subjected to the 1971 San Fernando earthquake excitation. An optimization subroutine based on the simplex method was utilized to determine the best absorber parameters for a given situation. It is concluded that the base isolators can be much more effective in protecting conventional structures from earthquake damages if they are used in conjunction with an absorber. The optimum mass of these absorbers is found to be quite small as compared to the mass of the ground structures. It is anticipated that the results obtained in this study could be put in practice in the near future and serve as a meaningful design technique in preventing earthquake damages.
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References
1.
Ahmadi, G. (1983). “Stochastic earthquake response of structures on sliding foundation.” Int. J. Engrg. Sci., 21(2), 93–102.
2.
Brochard, D., and Gantenbein, F. (1989). “Seismic analysis of sliding structures.” Trans., 10th Int. Conf. on Structural Mechanics in Reactor Technology, Vol. K2, Seismic Response Analysis and Design, American Association for Struct. Mech. in Reactor Tech., 613–618.
3.
Harrison, H. B. (1990). Structural analysis and design. Pergamon Press, New York, N.Y.
4.
Izumi, M. (1988). “State‐of‐the‐art report: Base isolation and passive seismic response control.” Proc., 9th World Conf. Earthquake Engineering, Int. Association for Earthquake Engrg., 385–396.
5.
Kelly, J. M. (1986). “Aseismic base isolation: review and bibliography.” Soil Dyn. Earthquake Engrg., 5(4), 202–216.
6.
Lambe, T. W., and Whitman, R. V. (1986). Soil mechanics. John Wiley & Sons, New York, N.Y.
7.
Li, G. (1991). “Optimal design of base isolated structures with dynamic absorbers,” MS thesis, Auburn Univ., Auburn, Ala.
8.
Mahin, S., and Bozzo, L. (1989). “Response of elastic single degree of freedom systems supported on FPS connections.” Report No. UCB/EERC‐89/09, Earthquake Engrg. Res. Ctr., Univ. of California, Berkeley, Calif.
9.
Mazda, T., Shiojiri, H., and Sawada, Y. (1989). “Earthquake response analysis of base isolated buildings.” Trans., 10th Int. Conf. on Structural Mechanics in Reactor Technology, Vol. K2, Seismic Response Analysis and Design, American Association for Struct. Mech. in Reactor Tech., 655–660.
10.
Mostaghel, N., and Tanbkuchi, J. (1983). “Response of sliding structures to earthquake support motion.” Earthquake Engrg. Struct. Dynamics, 11(6), 729–748.
11.
Mostaghel, N., Hejazi, M., and Tanbakuchi, J. T. (1982). “Response of sliding structures to harmonic support motion.” Report No. UTEC‐82‐040, Univ. of Utah, Salt Lake City, Utah.
12.
Saruta, M., Watanabe, H., and Izumi, M. (1989). “Proof test of base isolated building using high damping rubber bearing.” Trans., 10th Int. Conf. on Structural Mechanics in Reactor Technology, Vol. K2, Seismic Response Analysis and Design, American Association for Struct. Mech. in Reactor Tech., 631–636.
13.
Sinha, S. C., Lim, G. G., and Chou, C. C. (1989). “Crash pad design for side impact protection.” Tech. Report No. EM‐89‐10, Ford Motor Co., Dearborn, Mich.
14.
Sobotka, Z. (1984). Rheology of materials and engineering structures. Elsevier, New York, N.Y.
15.
Westermo, B., and Udwadia, F. (1983). “Periodic response of a sliding oscillator system to harmonic excitation.” Earthquake Engrg. and Struct. Dynamics, 11(1), 135–146.
16.
Zayas, V., and Low, S. (1989). “Effects of displacement restraints on building response.” Report No. UCB/EERC‐89/09, Earthquake Engrg. Res. Ctr., Univ. of California, Berkeley, Calif.
Information & Authors
Information
Published In
Journal of Engineering Mechanics
Volume 120 • Issue 2 • February 1994
Pages: 221 - 231
Copyright
Copyright © 1994 American Society of Civil Engineers.
History
Received: Jan 26, 1993
Published online: Feb 1, 1994
Published in print: Feb 1994
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