TY - JOUR
T1 - Causal implementation of rate-independent linear damping for the seismic protection of 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 Scholarship Council and a Grant-in-Aid for Scientific Research (B) (No. 21H01483) provided by the Japan Society for the Promotion of Science. The authors also acknowledge the National Research Institute for Earth Science and Disaster Resilience for providing the Tomakomai site record of the 2003 Tokachi-Oki Earthquake. We would like to thank Editage (http://www.editage.com) for English language editing of this manuscript.
Funding Information:
This research was financially supported by the Overseas Doctoral Program of the China Scholarship Council and a Grant-in-Aid for Scientific Research (B) (No. 21H01483) provided by the Japan Society for the Promotion of Science. The authors also acknowledge the National Research Institute for Earth Science and Disaster Resilience for providing the Tomakomai site record of the 2003 Tokachi-Oki Earthquake. We would like to thank Editage ( http://www.editage.com ) for English language editing of this manuscript.
Publisher Copyright:
© 2021 Institution of Structural Engineers
PY - 2022/1
Y1 - 2022/1
N2 - Damage to low-frequency structures caused by recent major earthquakes, such as the 2011 Great East Japan Earthquake, have emphasized the need to protect these structures from low-frequency ground motions. Previous studies have suggested that rate-independent linear damping (RILD) is a viable option for simultaneously reducing excessive displacement and floor response accelerations of low-frequency structures. The majority of previous studies on RILD have focused on the theoretical and mathematical aspects, while the physical implementation of RILD has not yet been extensively investigated. Therefore, this study proposes a novel method based on using a digital filter for causally and physically implementing RILD and examines its feasibility for the protection of low-frequency structures. A feasibility study based on a numerical analysis is conducted to identify the limitations of the proposed method.
AB - Damage to low-frequency structures caused by recent major earthquakes, such as the 2011 Great East Japan Earthquake, have emphasized the need to protect these structures from low-frequency ground motions. Previous studies have suggested that rate-independent linear damping (RILD) is a viable option for simultaneously reducing excessive displacement and floor response accelerations of low-frequency structures. The majority of previous studies on RILD have focused on the theoretical and mathematical aspects, while the physical implementation of RILD has not yet been extensively investigated. Therefore, this study proposes a novel method based on using a digital filter for causally and physically implementing RILD and examines its feasibility for the protection of low-frequency structures. A feasibility study based on a numerical analysis is conducted to identify the limitations of the proposed method.
KW - Digital filter
KW - Excessive displacement
KW - Low-frequency structures
KW - Physical implementation
KW - Rate-independent linear damping
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U2 - 10.1016/j.istruc.2021.10.095
DO - 10.1016/j.istruc.2021.10.095
M3 - Article
AN - SCOPUS:85119205307
SN - 2352-0124
VL - 35
SP - 274
EP - 288
JO - Structures
JF - Structures
ER -