Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Optimal Design of Nontraditional Tuned Mass Damper for Base-Isolated Building
In this study, a nontraditional tuned mass damper (NTMD), in which a mass, spring, and damper are arranged in series, unlike in a traditional tuned mass damper, is examined for a base isolation (BI) system. The closed-form optimal frequency ratio and damping ratio of the NTMD are obtained by searching “fixed points” and thereafter minimizing the norm of the transfer function from the ground displacement to the relative displacement of the primary structure. The benefit of an optimized NTMD is that it suppresses the isolator displacement without sacrificing other responses. A comprehensive seismic performance evaluation of a linear BI system equipped with the NTMD designed by the proposed method proves that it outperforms some existing optimum design formulae. Moreover, a suite of artificial and recorded ground motions is employed to verify the effectiveness of the designed NTMD incorporated in a benchmark model equipped with a low-damping lead–rubber bearing. Numerical results confirm that the proposed design method can effectively reduce the excessive isolator displacement without compromising other responses, including the floor response acceleration in the primary structure.
Optimal Design of Nontraditional Tuned Mass Damper for Base-Isolated Building
In this study, a nontraditional tuned mass damper (NTMD), in which a mass, spring, and damper are arranged in series, unlike in a traditional tuned mass damper, is examined for a base isolation (BI) system. The closed-form optimal frequency ratio and damping ratio of the NTMD are obtained by searching “fixed points” and thereafter minimizing the norm of the transfer function from the ground displacement to the relative displacement of the primary structure. The benefit of an optimized NTMD is that it suppresses the isolator displacement without sacrificing other responses. A comprehensive seismic performance evaluation of a linear BI system equipped with the NTMD designed by the proposed method proves that it outperforms some existing optimum design formulae. Moreover, a suite of artificial and recorded ground motions is employed to verify the effectiveness of the designed NTMD incorporated in a benchmark model equipped with a low-damping lead–rubber bearing. Numerical results confirm that the proposed design method can effectively reduce the excessive isolator displacement without compromising other responses, including the floor response acceleration in the primary structure.
Optimal Design of Nontraditional Tuned Mass Damper for Base-Isolated Building
Li, Dawei (Autor:in) / Ikago, Kohju (Autor:in)
Journal of Earthquake Engineering ; 27 ; 2841-2862
27.07.2023
22 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
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