TY - GEN
T1 - Experimental study of a piezoelectric sliding isolation system for seismic protection of equipment
AU - Lu, Lyan-Ywan
AU - Lin, Ging Long
AU - Hung, Jiun Hung
AU - Liu, Yung Tien
PY - 2011/1/1
Y1 - 2011/1/1
N2 - The magnitude and content of an earthquake is usually hard to be predicted precisely. To make seismic isolation systems more adaptive to earthquake motions that may have diverse characteristics, a semi-active isolation system called the "Piezoelectric Sliding Isolation System (PSIS)" is introduced in this study for the seismic protection of precision equipment. The PSIS system is composed of a sliding isolation platform and a piezoelectric friction damper (PFD). Depending on the feedback signal of the PSIS response, the friction force of the PFD can be regulated on-line by an embedded piezoelectric actuator. As a result, the seismic response of the PSIS can be effectively controlled and mitigated. The feasibility of the PSIS is verified dynamically via a shaking table test in this study, and the comparison between the experimental and theoretical results has shown the good consistency. The experimental results also demonstrate that, the PSIS is able to substantially suppress both the displacement and acceleration responses in an earthquake with either near-fault or far-field characteristics. The study also shows that, even though the semi-active PSIS system can only provide a passive control force, it is able to achieve the same level of control performance as an actively controlled isolation system, which shares the same optimal feedback gain as that of the PSIS.
AB - The magnitude and content of an earthquake is usually hard to be predicted precisely. To make seismic isolation systems more adaptive to earthquake motions that may have diverse characteristics, a semi-active isolation system called the "Piezoelectric Sliding Isolation System (PSIS)" is introduced in this study for the seismic protection of precision equipment. The PSIS system is composed of a sliding isolation platform and a piezoelectric friction damper (PFD). Depending on the feedback signal of the PSIS response, the friction force of the PFD can be regulated on-line by an embedded piezoelectric actuator. As a result, the seismic response of the PSIS can be effectively controlled and mitigated. The feasibility of the PSIS is verified dynamically via a shaking table test in this study, and the comparison between the experimental and theoretical results has shown the good consistency. The experimental results also demonstrate that, the PSIS is able to substantially suppress both the displacement and acceleration responses in an earthquake with either near-fault or far-field characteristics. The study also shows that, even though the semi-active PSIS system can only provide a passive control force, it is able to achieve the same level of control performance as an actively controlled isolation system, which shares the same optimal feedback gain as that of the PSIS.
UR - http://www.scopus.com/inward/record.url?scp=84959924007&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84959924007&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84959924007
T3 - Proceedings of the 8th International Conference on Structural Dynamics, EURODYN 2011
SP - 1962
EP - 1967
BT - Proceedings of the 8th International Conference on Structural Dynamics, EURODYN 2011
A2 - Lombaert, G.
A2 - Muller, G.
A2 - De Roeck, G.
A2 - Degrande, G.
PB - University of Southampton, Institute of Sound Vibration and Research
T2 - 8th International Conference on Structural Dynamics, EURODYN 2011
Y2 - 4 July 2011 through 6 July 2011
ER -