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Appl. Sci. 2017, 7(2), 185; doi:10.3390/app7020185

Self-Tuning Fuzzy Control for Seismic Protection of Smart Base-Isolated Buildings Subjected to Pulse-Type Near-Fault Earthquakes

1
School of Civil Engineering and Mechanics, Yanshan University, Qinhuangdao 066004, China
2
School of Civil Engineering, Dalian University of Technology, Dalian 116024, China
*
Author to whom correspondence should be addressed.
Academic Editor: Steve C.S. Cai
Received: 10 December 2016 / Revised: 23 January 2017 / Accepted: 9 February 2017 / Published: 16 February 2017
View Full-Text   |   Download PDF [4000 KB, uploaded 16 February 2017]   |  

Abstract

Pulse-type near-fault earthquakes have obvious long-duration pulses, so they can cause large deformation in a base-isolated system in contrast to non-pulse-type near-fault and far-field earthquakes. This paper proposes a novel self-tuning fuzzy logic control strategy for seismic protection of a base-isolated system, which can operate the control force of the piezoelectric friction damper against different types of earthquakes. This control strategy employs a hierarchic control algorithm, in which a higher-level supervisory fuzzy controller is implemented to adjust the input normalization factors and output scaling factor, while a sub-level fuzzy controller effectively determines the command voltage of the piezoelectric friction damper according to current level of earthquakes. The efficiency of the proposed control strategy is also compared with uncontrolled and maximum passive cases. Numerical results reveal that the novel fuzzy logic control strategy can effectively reduce the isolation system deformations without the loss of potential advantages of base-isolated system. View Full-Text
Keywords: pulse-type near-fault earthquake; base-isolation; fuzzy logic control (FLC); piezoelectric friction damper; vibration control pulse-type near-fault earthquake; base-isolation; fuzzy logic control (FLC); piezoelectric friction damper; vibration control
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Zhao, D.; Liu, Y.; Li, H. Self-Tuning Fuzzy Control for Seismic Protection of Smart Base-Isolated Buildings Subjected to Pulse-Type Near-Fault Earthquakes. Appl. Sci. 2017, 7, 185.

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