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Proceedings Paper

Development and application of induced-strain actuators for building structures
Author(s): Koichi Morita; Takafumi Fujita; Shiro Ise; Ken-ichi Kawaguchi; Takayoshi Kamada; Hideo Fujitani
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Paper Abstract

Induced strain actuator (ISA) can change their own shapes according to external electric/magnetic fields, and vice versa. Recently these materials have been widely used for the small/precision. The objectives in this study are to develop smart members for building and to realize the smart, comfortable and safe structures. The research items are 1) Semi-active isolation of structures using piezoelectric actuator, 2) Using ISA as sensor materials and 3) Improvement of Acoustic Environment. Semi-active base isolation system with controllable friction damper using piezoelectric actuators is proposed. Simulation study was carried out, and by semi-active isolation, it could be realized to reduce response displacement of the structure to 50% of values of the passive isolation. ISA materials can act as sensors because they cause change of electric or magnetic fields under deformation. PVDF sensors are suitable for membrane structures. We evaluate performance of PVDF sensors for membrane structures by experiment. Polymer based ISA films or distributed ISA devices can control vibration mode of plane members. Applications to music halls or dwelling partition walls are expected. Results of experimental studies of noise control are discussed.

Paper Details

Date Published: 30 July 2001
PDF: 12 pages
Proc. SPIE 4330, Smart Structures and Materials 2001: Smart Systems for Bridges, Structures, and Highways, (30 July 2001); doi: 10.1117/12.434143
Show Author Affiliations
Koichi Morita, Ministry of Land, Infrastructure and Transport (Japan)
Takafumi Fujita, Univ. of Tokyo (Japan)
Shiro Ise, Kyoto Univ. (Japan)
Ken-ichi Kawaguchi, Univ. of Tokyo (Japan)
Takayoshi Kamada, Tokyo Univ. of Agriculture and Technology (Japan)
Hideo Fujitani, Ministry of Land, Infrastructure and Transport (Japan)

Published in SPIE Proceedings Vol. 4330:
Smart Structures and Materials 2001: Smart Systems for Bridges, Structures, and Highways
S.-C. Liu, Editor(s)

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