Friction pendulum-strengthened tuned liquid damper (FPTLD) for earthquake resilience of isolated structures

•Novel friction pendulum-strengthened tuned liquid damper (FPTLD).•FPTLD-based multi-performance control of isolated structure and isolation layer.•Dual-modal and lightweight-based control benefits of FPTLD over TLD.•Design method and easy-to-use design formula of optimal FPTLD.•FPTLD-based robust m...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:International journal of mechanical sciences 2023-04, Vol.244, p.108084, Article 108084
Hauptverfasser: Zhao, Zhipeng, Hu, Xiuyan, Chen, Qingjun, Wang, Yanchao, Hong, Na, Zhang, Ruifu
Format: Artikel
Sprache:eng
Schlagworte:
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:•Novel friction pendulum-strengthened tuned liquid damper (FPTLD).•FPTLD-based multi-performance control of isolated structure and isolation layer.•Dual-modal and lightweight-based control benefits of FPTLD over TLD.•Design method and easy-to-use design formula of optimal FPTLD.•FPTLD-based robust mitigation against liquid height variation due to daily usage. Conventional base isolation has been commonly used to protect structures against destructive earthquakes. However, base-isolated structures can be vulnerable to ground motions, including resonant frequency components, which cause significant displacement of the isolation floor and a weakened isolating effect. To address this issue, this study develops a friction pendulum-strengthened tuned liquid damper (FPTLD) as a hybrid isolating system that comprises a friction pendulum subsystem mounted at the bottom of a liquid tank with sloshing liquid inside. Its configuration and theoretical analysis model are established, based on which the experimental test of the tuned liquid subsystem and finite element simulation of the complete FPTLD are conducted for validation. The nonlinear stochastic response analysis is performed for an FPTLD-equipped isolated structure within a probabilistic framework. Correspondingly, the dual-modal and lightweight-based control benefits of the FPTLD over conventional and TLD-equipped isolation systems are clarified by an extensive parametric analysis. Based on the simultaneous control of the isolation floor and the superstructure, a multiperformance-based design framework is presented for the FPTLD, and an easy-to-use design formula is obtained by fitting its numerical design results. To illustrate the effectiveness of the developed device and the design method, the FPTLD is used in a typical base-isolated building subjected to various seismic excitations. The obtained results show that the optimized FPTLD with adjustable tuning degrees—liquid sloshing and friction pendulums—is highly effective in simultaneously enhancing the multiple seismic performances of the superstructure and the isolation floor. In particular, compared with conventional and tuned liquid damper-equipped isolation systems, the FPTLD facilitates sufficient utilization of the entire liquid for efficient energy absorption by implementing friction pendulums, reducing the deformation demand of an isolation floor. Benefitting from the friction pendulums with a constant isolating period, the FPTLD demonstrates a ro
ISSN:0020-7403
1879-2162
DOI:10.1016/j.ijmecsci.2022.108084