Geometrically nonlinearity analysis and performance evaluation of tuned inerter dampers for multidirectional seismic isolation

Tai, Yu‐ji; Huang, Zhiwen; Chen, Chao; Hua, Xugang; Chen, Zhengqing

doi:10.1016/j.ymssp.2021.108681

Cited by 15 publications

(2 citation statements)

References 46 publications

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“…The efficiency and optimum TID parameters for the base-isolated structure when considering the stochastic model of earthquake excitation are also illustrated [18][19][20][21][22][23]. To reduce the seismic response and vibration isolation in the base-isolated structures, a geometrically nonlinear TID arrangement is also being investigated for multidirectional isolation [24]. The use of multiple TMDs to control the seismic response of base-isolated buildings has recently been studied [25,26].…”

Section: Introductionmentioning

confidence: 99%

The Role of a Simple Inerter in Seismic Base Isolation

Jangid

2024

Applied Sciences

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The present study investigates the role of a simple inerter in supplemental devices for possible implementation in the mature seismic base isolation technique. Firstly, the response of the base-isolated structure with an optimally tuned mass damper inerter (TMDI) is investigated to see the tuning effects. The time required to tune the TMDI was found to be significantly longer than the duration of a strong-motion earthquake. There was still a reduction in the response of the isolated structure, which is primarily due to the added damping and stiffness (ADAS) of TMDI and not because of the tuning effects. Hence, it is proposed that the corresponding ADAS of the TMDI be directly added to the isolation device. Secondly, the response of the base-isolated structures to the fluid inerter damper (FID) is studied. It was observed that the inerter of the FID does not influence the displacement variance of an isolated structure under broadband earthquake excitation. It implies that the response of the isolated structure to FID is primarily controlled by its counterpart fluid damper (FD). The performance of optimal TMDI, ADAS, FID, and FD to mitigate the seismic response of the flexible multi-story base-isolated structure under real earthquake excitations is also investigated. In terms of suppressing the displacement and acceleration responses of the isolated structure, it has been found that TMDI and ADAS perform similarly. Comparing the response of the isolated structure with FID and FD demonstrated that the inerter in the FID has detrimental effects on the isolated structures, in which the top floor’s acceleration and base shear are substantially increased.

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Section: Introductionmentioning

confidence: 99%

The Role of a Simple Inerter in Seismic Base Isolation

Jangid

2024

Applied Sciences

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“…Hence, isolation systems may be divided into two categories; the first category includes the family of elastomeric bearings 6 , 7 , in which we find the high damping rubber bearing system (HDRB), the lead rubber bearing system (LRBs) and other systems. The second category includes the family of sliding bearings, in which we find the friction pendulum system (FPS) 8 and sliding bearing 9 with and without system without recentering (SI), among others 10 .…”

Section: Introductionmentioning

confidence: 99%

Selection of seismic isolation system parameters for the near-optimal design of structures

Leblouba¹

2022

Sci Rep

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The benefits of seismic isolation are many. Structures that are isolated from the ground seismically perform better than those that are not. They experience reduced floor accelerations and drifts and are less likely to experience damage to structural elements. Additionally, their contents are better protected from the effects of earthquakes. The selection and design of seismic isolation devices are complex and require a good understanding of how they behave during earthquakes. This study investigates the effect of various isolation system parameters and ground motion characteristics on the seismic response of base isolated structures in order to develop rational procedures for design and analysis. Additionally, the study investigates the problem of optimal design of seismic isolation systems through parametric nonlinear dynamic analysis. Results showed that the maximum base shear and displacement were velocity-sensitive and that the peak ground velocity controls the motion. The largest maximum base shear occurred when using isolation systems with high yield strength levels and low degrees of nonlinearity, while the smallest maximum base shear occurred when using low yield strength levels and high degrees of nonlinearity. Results from the study can be used to select the appropriate isolation devices and design them correctly to achieve the benefits they provide.

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