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Appl. Sci. 2017, 7(4), 344; doi:10.3390/app7040344

Experimental Investigation of a Base Isolation System Incorporating MR Dampers with the High-Order Single Step Control Algorithm

1
School of Civil Engineering, Qingdao University of Technology, Qingdao 266033, China
2
School of Civil Engineering, Heilongjiang University, Harbin 150080, China
3
Centre for Infrastructure Engineering, Western Sydney University, Penrith NSW 2751, Australia
4
School of Civil Engineering, Shenyang Jianzhu University, Shenyang 110168, China
*
Author to whom correspondence should be addressed.
Received: 19 December 2016 / Revised: 7 March 2017 / Accepted: 25 March 2017 / Published: 30 March 2017
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Abstract

The conventional isolation structure with rubber bearings exhibits large deformation characteristics when subjected to infrequent earthquakes, which may lead to failure of the isolation layer. Although passive dampers can be used to reduce the layer displacement, the layer deformation and superstructure acceleration responses will increase in cases of fortification earthquakes or frequently occurring earthquakes. In addition to secondary damages and loss of life, such excessive displacement results in damages to the facilities in the structure. In order to overcome these shortcomings, this paper presents a structural vibration control system where the base isolation system is composed of rubber bearings with magnetorheological (MR) damper and are regulated using the innovative control strategy. The high-order single-step algorithm with continuity and switch control strategies are applied to the control system. Shaking table test results under various earthquake conditions indicate that the proposed isolation method, compared with passive isolation technique, can effectively suppress earthquake responses for acceleration of superstructure and deformation within the isolation layer. As a result, this structural control method exhibits excellent performance, such as fast computation, generic real-time control, acceleration reduction and high seismic energy dissipation etc. The relative merits of the continuity and switch control strategies are also compared and discussed. View Full-Text
Keywords: structural vibration control; base isolation control system; magnetorheological (MR) damper; shaking table test; high order single step integration algorithm structural vibration control; base isolation control system; magnetorheological (MR) damper; shaking table test; high order single step integration algorithm
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Fu, W.; Zhang, C.; Sun, L.; Askari, M.; Samali, B.; Chung, K.L.; Sharafi, P. Experimental Investigation of a Base Isolation System Incorporating MR Dampers with the High-Order Single Step Control Algorithm. Appl. Sci. 2017, 7, 344.

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