Rocking Response of Anchored Blocks under Pulse-Type Motions
Publication: Journal of Engineering Mechanics
Volume 127, Issue 5
Abstract
This paper examines the transient rocking response of anchored blocks subjected to physically realizable horizontal pulse-type motion. Restrainers with elastic-brittle and elastic-plastic behavior are considered. Under one-sine pulse, anchored blocks can overturn with two distinct modes of overturning: (1) by exhibiting one impact; and (2) without exhibiting any impact. It is found that restrainers are more efficient in preventing overturning of small slender blocks subjected to low frequency pulses. This study uncovers that, although for most of the frequency range anchored blocks survive higher accelerations than free-standing blocks, there is a finite frequency range where the opposite happens. This paper examines this counterintuitive behavior and explains the destructive effect that increased strength and increased ductility of restrainers have on the rocking stability of rigid structures when excited by certain ground motions.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Bouc, R. ( 1971). “Modele mathematique d'hysteresis.” Acustica, 24, 16–25 (in French).
2.
Dimentberg, M. F., Lin, Y. K., and Zhang, R. (1993). “Toppling of computer-type equipment under base excitation.”J. Engrg. Mech., ASCE, 119(1), 145–160.
3.
Jacobsen, L. S., and Ayre, R. S. ( 1958). Engineering vibrations, McGraw-Hill, New York.
4.
Makris, N. ( 1997). “Rigidity-plasticity-viscosity: Can electrorheological dampers protect base-isolated structures from near-source ground motions?” Earthquake Engrg. and Struct. Dyn., 26, 571–591.
5.
Makris, N., and Roussos, Y. ( 1998). “Rocking response and overturning of equipment under horizontal pulse-type motions.” Rep. No. PEER-98/05, Pacific Earthquake Engineering Research Center, University of California, Berkeley, Calif.
6.
Milne, J. ( 1885). “Seismic experiments.” Trans. Seism. Soc. Japan, 8, 1–82.
7.
Wen, Y.K. (1975). “Approximate method for nonlinear random vibration.”J. Engrg. Mech. Div., ASCE, 101(4), 389–401.
8.
Wen, Y.K. (1976). “Method for random vibration of hysteretic systems.”J. Engrg. Mech. Div., ASCE, 102(2), 249–263.
9.
Zhang, J., and Makris, N. (2001). “Rocking response of free-standing blocks under cycloidal pulses.”J. Engrg. Mech., ASCE, 127(5), 473–483.
Information & Authors
Information
Published In
Journal of Engineering Mechanics
Volume 127 • Issue 5 • May 2001
Pages: 484 - 493
History
Received: Jan 14, 2000
Published online: May 1, 2001
Published in print: May 2001
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.