A smart mechatronic base isolation system using earthquake early warning

Chan, R, Lin, Y and Tagawa, H 2019, 'A smart mechatronic base isolation system using earthquake early warning', Soil Dynamics and Earthquake Engineering, vol. 119, pp. 299-307.

Document type: Journal Article
Collection: Journal Articles

Title A smart mechatronic base isolation system using earthquake early warning
Author(s) Chan, R
Lin, Y
Tagawa, H
Year 2019
Journal name Soil Dynamics and Earthquake Engineering
Volume number 119
Start page 299
End page 307
Total pages 9
Publisher Elsevier
Abstract In earthquake-prone countries such as Japan, effects of earthquakes are one of the major design objectives in buildings and infrastructures. Recent advances in earthquake engineering have improved the safety and relia- bility of buildings and infrastructures. Better understanding of geomorphology of earthquakes also enables us to better predict and estimate propagation of such natural hazard. For example, the Earthquake Early Warning (EEW) system in Japan provides advanced warnings using the different arrival times of P and S waves. On the other hand, techniques and methods in passive, semi-active and active vibration control have flourished. Base- isolation is a proven technique which enhances earthquake resilience of buildings and bridges. In general, this technique involves decoupling a superstructure from its foundation and lengthens its natural period of vibration. This technique is mature and commercialization has taken place worldwide. However, wind-resistance of base- isolated structures is generally a concern as the lateral stiffness of a base-isolated structure is low and service- ability wind effects may induce unacceptable lateral movement and/or vibration of the structure. This paper presents a new concept which the base-isolation system is activated by EEW system through a mechatronic system. In other times the structure is not base-isolated and provides strong lateral resistance against wind loads. As a backup design, the proposed system also equips with its own network of accelerometers which can trigger base isolation system independent from EEW system. The smart mechatronic base isolation system is fully au- tomated, and resets itself after each ground motion. The paper describes the conceptual framework of proposed system and presents laboratory-scaled proof-of-concept experiments. Four historical earthquake time histories were used as ground excitations. Structural responses are compared between the two triggering mechanisms and results are discu
Subject Structural Engineering
Earthquake Engineering
Keyword(s) Smart structures
Base isolation
Earthquake early warning
Internet of things
DOI - identifier 10.1016/j.soildyn.2019.01.019
Copyright notice © 2019 Elsevier Ltd. All rights reserved.
ISSN 0267-7261
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