TY - JOUR
T1 - Feasibility of physical implementation of rate-independent linear damping to protect multistory low-frequency structures
AU - Liu, Wei
AU - Ikago, Kohju
N1 - Funding Information:
This research was financially supported by the Overseas Doctoral Program of the China Scholarships Council and a Grant-in-Aid for Scientific Research (B) (No. 21H01483). The authors would like to acknowledge Osaka Prefecture and Dr. Toshihide Kashima of the Building Research Institute of Japan for providing the Sakishima site record of the 2011 Great East Japan Earthquake. We would like to thank Editage (http://www.editage.com) for editing and reviewing this manuscript for English language.
Publisher Copyright:
© 2022
PY - 2022/6/23
Y1 - 2022/6/23
N2 - Many low-frequency structures such as high-rise and seismically isolated buildings that were located far from the epicenter of the 2011 Great East Japan Earthquake were selectively shaken for a long time by the low-frequency component of the ground motion, leading to damaged nonstructural components, highlighting the need to protect these structures from low-frequency ground motions. Previous studies have suggested that rate-independent linear damping (RILD) can be a promising approach for reducing the floor response accelerations of low-frequency structures. Because RILD is a noncausal element, most previous studies on RILD have focused mainly on mathematical aspects, and the feasibility of physical implementation of RILD has not been extensively investigated. The main objective of this study is to examine the feasibility of the physical implementation of RILD to protect multistory low-frequency structures. In this study, a causal RILD device comprising a Maxwell element and a negative-stiffness element in a parallel configuration was investigated to realize the causal approximation of RILD. Both numerical analyses and real-time hybrid simulations were performed to identify the challenges in the implementation of RILD.
AB - Many low-frequency structures such as high-rise and seismically isolated buildings that were located far from the epicenter of the 2011 Great East Japan Earthquake were selectively shaken for a long time by the low-frequency component of the ground motion, leading to damaged nonstructural components, highlighting the need to protect these structures from low-frequency ground motions. Previous studies have suggested that rate-independent linear damping (RILD) can be a promising approach for reducing the floor response accelerations of low-frequency structures. Because RILD is a noncausal element, most previous studies on RILD have focused mainly on mathematical aspects, and the feasibility of physical implementation of RILD has not been extensively investigated. The main objective of this study is to examine the feasibility of the physical implementation of RILD to protect multistory low-frequency structures. In this study, a causal RILD device comprising a Maxwell element and a negative-stiffness element in a parallel configuration was investigated to realize the causal approximation of RILD. Both numerical analyses and real-time hybrid simulations were performed to identify the challenges in the implementation of RILD.
KW - Low-frequency structures
KW - Noncausal element
KW - Physical implementation
KW - Rate-independent linear damping
KW - Real-time hybrid simulations
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U2 - 10.1016/j.jsv.2022.116893
DO - 10.1016/j.jsv.2022.116893
M3 - Article
AN - SCOPUS:85126572488
SN - 0022-460X
VL - 528
JO - Journal of Sound and Vibration
JF - Journal of Sound and Vibration
M1 - 116893
ER -