Variable Negative Stiffness Device for Seismic Protection of Building Structures through Apparent Weakening
Publication: Journal of Engineering Mechanics
Volume 144, Issue 9
Abstract
In the present work, the variable negative stiffness device (VNSD) is presented for seismic protection through apparent weakening. Equations relating the force-displacement behavior for two different VNSD configurations are presented, and a parameter search is conducted to identify the system parameters leading to three different desired force-displacement profiles. Validation of the concept is provided through laboratory testing on a small-scale prototype subject to cyclic loading. Then, numerical simulations are performed for an inelastic building model with supplemental damping and three different VNSD systems subject to a suite of earthquake ground motions. The results show that the performance of the VNSD systems with and without stiffening was the same for the structure without yielding, and comparable when the structure experienced severe yielding. For the structure subject to extreme yielding, significantly larger peak displacements and smaller peak absolute accelerations and base shears were obtained for the VNSD system without stiffening. Finally, the effect of increasing supplemental damping in the structure on the performance of the VNSD systems was investigated.
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References
Attary, N., M. Symans, and S. Nagarajaiah. 2015a. “Development of a rotation-based negative stiffness device for seismic protection of structures.” J. Vib. Control 23 (5): 853–867. https://doi.org/10.1177/1077546315585435.
Attary, N., M. Symans, S. Nagarajaiah, A. M. Reinhorn, M. C. Constantinou, A. A. Sarlis, D. T. R. Pasala, and D. P. Taylor. 2015b. “Experimental shake table testing of an adaptive passive negative stiffness device within a highway bridge model.” Earthquake Spectra 31 (4): 2163–2194. https://doi.org/10.1193/101913EQS273M.
Attary, N., M. Symans, S. Nagarajaiah, A. M. Reinhorn, M. C. Constantinou, A. A. Sarlis, D. T. R. Pasala, and D. P. Taylor. 2015c. “Numerical simulations of a highway bridge structure employing passive negative stiffness device for seismic protection.” Earthquake Eng. Struct. Dyn. 44 (6): 973–995. https://doi.org/10.1002/eqe.2495.
Attary, N., M. Symans, S. Nagarajaiah, A. M. Reinhorn, M. C. Constantinou, A. A. Sarlis, D. T. R. Pasala, and D. P. Taylor. 2015d. “Performance evaluation of negative stiffness devices for seismic response control of bridge structures via experimental shake table tests.” J. Earthquake Eng. 19 (2): 249–276. https://doi.org/10.1080/13632469.2014.962672.
Kwon, I. Y., H. T. Yang, P. K. Hansma, and C. J. Randall. 2016. “Implementable bio-inspired passive negative stiffness spring actuator for full-scale structural control under seismic excitation.” J. Struct. Eng. 142 (1): 04015079. https://doi.org/10.1061/(ASCE)ST.1943-541X.0001323.
Nagarajaiah, S., A. M. Reinhorn, M. C. Constantinou, D. Taylor, D. T. R. Pasala, and A. A. Sarlis. 2010. “Adaptive negative stiffness: A new structural modification approach for seismic protection.” In Proc., 5th World Conf. on Structural Control and Monitoring. Tokyo: IASCM, Univ. of Tokyo.
Pasala, D. T. R., A. A. Sarlis, S. Nagarajaiah, A. M. Reinhorn, M. C. Constantinou, and D. Taylor. 2013. “Adaptive negative stiffness: New structural modification approach for seismic protection.” J. Struct. Eng. 139 (7): 1112–1123. https://doi.org/10.1061/(ASCE)ST.1943-541X.0000615.
Pasala, D. T. R., A. A. Sarlis, A. M. Reinhorn, S. Nagarajaiah, M. C. Constantinou, and D. Taylor. 2014. “Simulated bilinear-elastic behavior in a SDOF elastic structure using negative stiffness device: Experimental and analytical study.” J. Struct. Eng. 140 (2): 04013049. https://doi.org/10.1061/(ASCE)ST.1943-541X.0000830.
Pasala, D. T. R., A. A. Sarlis, A. M. Reinhorn, S. Nagarajaiah, M. C. Constantinou, and D. Taylor. 2015. “Apparent weakening of SDOF yielding structures using a negative stiffness device: Experimental and analytical study.” J. Struct. Eng. 141 (4): 04014130. https://doi.org/10.1061/(ASCE)ST.1943-541X.0001077.
Sarlis, A. A., D. T. R. Pasala, M. C. Constantinou, A. M. Reinhorn, S. Nagarajaiah, and D. P. Taylor. 2013. “Negative stiffness device for seismic protection of structures.” J. Struct. Eng. 139 (7): 1124–1133. https://doi.org/10.1061/(ASCE)ST.1943-541X.0000616.
Sarlis, A. A., D. T. R. Pasala, M. C. Constantinou, A. M. Reinhorn, S. Nagarajaiah, and D. P. Taylor. 2016. “Negative stiffness device for seismic protection of structures: Shake table testing of a seismically isolated structure.” J. Struct. Eng. 142 (5): 04016005. https://doi.org/10.1061/(ASCE)ST.1943-541X.0001455.
Wen, Y. K. 1976. “Method for random vibration of hysteretic systems.” J. Eng. Mech. Div. 102 (2): 249–263.
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Published In
Journal of Engineering Mechanics
Volume 144 • Issue 9 • September 2018
Copyright
©2018 American Society of Civil Engineers.
History
Received: Mar 14, 2017
Accepted: Apr 11, 2018
Published online: Jul 10, 2018
Published in print: Sep 1, 2018
Discussion open until: Dec 10, 2018
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