In this paper, the concept of a novel passive control device, namely the Nontraditional Tuned Liquid Column Damper Inerter (NT-TLCDI), is investigated in combination with seismic base isolation (BI), to control lateral displacement demands in base-isolated structures during seismic events. The considered NT-TLCDI is a revision of the ordinary configuration of the recently proposed Tuned Liquid Column Damper Inerter (TLCDI). Unlike the traditional TLCDI layout, which involves a secondary liquid mass in a U-shaped tank coupled with a grounded inerter and connected to the isolation system by a spring-dashpot system, in the NT-TLCDI configuration, the damper is in parallel with the inerter rather than the spring. The optimal design, including the determination of the tuning frequency and damping ratios of the NT-TLCDI, is discussed with the purpose to reduce the base displacement variance of the BI system assuming a white noise base excitation. Under the optimal tuning con-dition, it is found that the proposed NT-TLCDI provides a larger suppression of vibration amplitude of the BI system than the traditional TLCDI in both the frequency domain and time domain. A more interesting aspect is the reduction of the device displacement achieved by the NT-TLCDI, which may be beneficial in practice when the space for housing the device is limited.

Masnata C., Di Matteo A., Adam C., Pirrotta A. (2023). Nontraditional configuration of tuned liquid column damper inerter for base-isolated structures. MECHANICS RESEARCH COMMUNICATIONS, 129 [10.1016/j.mechrescom.2023.104101].

Nontraditional configuration of tuned liquid column damper inerter for base-isolated structures

Masnata C.
Primo
;
Di Matteo A.
Secondo
;
Pirrotta A.
Ultimo
2023-05-01

Abstract

In this paper, the concept of a novel passive control device, namely the Nontraditional Tuned Liquid Column Damper Inerter (NT-TLCDI), is investigated in combination with seismic base isolation (BI), to control lateral displacement demands in base-isolated structures during seismic events. The considered NT-TLCDI is a revision of the ordinary configuration of the recently proposed Tuned Liquid Column Damper Inerter (TLCDI). Unlike the traditional TLCDI layout, which involves a secondary liquid mass in a U-shaped tank coupled with a grounded inerter and connected to the isolation system by a spring-dashpot system, in the NT-TLCDI configuration, the damper is in parallel with the inerter rather than the spring. The optimal design, including the determination of the tuning frequency and damping ratios of the NT-TLCDI, is discussed with the purpose to reduce the base displacement variance of the BI system assuming a white noise base excitation. Under the optimal tuning con-dition, it is found that the proposed NT-TLCDI provides a larger suppression of vibration amplitude of the BI system than the traditional TLCDI in both the frequency domain and time domain. A more interesting aspect is the reduction of the device displacement achieved by the NT-TLCDI, which may be beneficial in practice when the space for housing the device is limited.
mag-2023
Settore ICAR/08 - Scienza Delle Costruzioni
Masnata C., Di Matteo A., Adam C., Pirrotta A. (2023). Nontraditional configuration of tuned liquid column damper inerter for base-isolated structures. MECHANICS RESEARCH COMMUNICATIONS, 129 [10.1016/j.mechrescom.2023.104101].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/590412
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