Seismic performance upgrading of containment structures using a negative-stiffness amplification system

Zhao, Zhipeng; Wang, Yanchao; Hu, Xiuyan; Weng, Dagen

doi:10.1016/j.engstruct.2022.114394

Cited by 37 publications

(8 citation statements)

References 40 publications

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“…In the present study, a Kanai-Tajimi model is considered 77,78 . The model of the isolated structure with supplemental TMNSDI, as shown in Fig.…”

Section: Rigid Base-isolated Structure With Tmnsdimentioning

confidence: 99%

“…Different control methods consist of NSD for reducing the response of structures to the seismic load 63,64 . Many researchers reported about response control of the structure system due to seismic load using a NSD 40,61,[65][66][67][68][69][70][71][72][73][74][75][76] . In the case of a base-isolated structure, the superstructure is rigid, whereas the isolation part is flexible to increase the damping effect.…”

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confidence: 99%

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Optimum design and performance of a base-isolated structure with tuned mass negative stiffness inerter damper

Kiran

Al‐Osta

Ahmad

2023

Sci Rep

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In order to increase the efficiency of the structures to resist seismic excitation, combinations of inerter, negative stiffness, and tuned mass damper are used. In the present work, the optimum tuning frequency ratio and damping of the tuned mass negative stiffness damper-inerter (TMNSDI) for the base-isolated structure were determined by employing the numerical searching technique under filtered white-noise earthquake excitation and stationary white noise. The energy dissipation index, the absolute acceleration, and the relative displacement of the isolated structure were considered as the optimum parameters, obtained by their maximization. Evaluations of base-isolated structures with and without TMNSDI under non-stationary seismic excitations were investigated. The efficiency of the optimally designed TMNSDI for isolated flexible structures in controlling seismic responses (pulse-type, and real earthquakes) were evaluated in terms of acceleration and displacement. A dynamic system was used for deriving the tuning frequency and tuned mass negative stiffness damper inerter (TMNSDI) for white noise excitation by using explicit formulae of the curve fitting method. The proposed empirical expressions, for design of base-isolated structures with supplementary TMNSDI, showed lesser error. Fragility curve results and story drift ratio indicate reduction in seismic response by 40% and 70% in base-isolated structure using TMNSDI.

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“…In the present study, a Kanai-Tajimi model is considered 77,78 . The model of the isolated structure with supplemental TMNSDI, as shown in Fig.…”

Section: Rigid Base-isolated Structure With Tmnsdimentioning

confidence: 99%

mentioning

confidence: 99%

Optimum design and performance of a base-isolated structure with tuned mass negative stiffness inerter damper

Kiran

Al‐Osta

Ahmad

2023

Sci Rep

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“…As a result the structures experience enhanced vibration isolation and shock attenuation across a broad spectrum of frequencies. Implementations of passive NS devices in seismically isolated structures [38][39][40][41][42] have demonstrated the effectiveness of the supplemental isolation systems in enhancing the overall dynamic performance of these structures. However, if the deformation of the existing bearings suppresses a specific threshold, significant displacements may arise.…”

Section: Introductionmentioning

confidence: 99%

Design and Performance Assessment of Base Isolated Structures Supplemented with Vibration Control Systems

Sapountzakis,

Florakis,

Kapasakalis

2024

Buildings

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This paper investigates the implementation of supplemental vibration control systems (VCS) in base isolated (BI) structures, to improve their dynamic performance. More specifically, the aim of the VCS is to reduce the base displacement demand of BI structures, and at the same time mitigate the superstructure seismic responses. The purpose of the examined VCS is dual, and for this reason a multi-objective optimization methodology is formulated for the design of the VCS. The examined vibration absorbers include modifications of the KDamper concept. The KDamper is an extension of the traditional Tuned Mass Damper (TMD), and introduces a negative stiffness (NS) element to the additional oscillating mass of the TMD. The generated NS force is exactly in phase with the inertia force of the added mass, thus, artificially amplifying it. This way, lighter configurations are possible with an enhanced damping behavior. These VCS are designed based on engineering criteria and manufacturing constraints, while the excitation input used in the multi-objective optimization procedure is selected from a dataset of artificial accelerograms, designed to be spectrum-compatible with the EC8 design acceleration response spectrum. The effectiveness of the examined VCS is also assess with real near-fault earthquake records, and a comparison is performed with TMD-based VCS having 50 times larger additional masses. The numerical results demonstrate the superiority of the KDamper-based VCS in improving the dynamic behavior of BI structures over other mass-related systems (TMD).

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“…Many scholars have proposed corresponding structural anti-rocking measures for the vertical seismic problem [8][9][10][11]. Liu [12] proposed a three-dimensional seismic isolation design method that separates the horizontal isolation layer from the vertical isolation layer.…”

Section: Introductionmentioning

confidence: 99%

Design and Analysis of Novel Anti-Rocking Bearing

Yang,

Kong,

et al. 2024

Buildings

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To address the issue of severe rocking phenomena under seismic conditions in structures equipped with steel spring isolation bearings, this paper investigates a novel type of anti-rocking bearing. Firstly, the structural configuration and working principle of the novel anti-rocking bearing are introduced, and a design method for bearing parameters is proposed. Secondly, a finite element analysis model is established using SAP2000-v20 software to conduct nonlinear dynamic time–history analysis under seismic loading. The analysis results show that the structural arrangement of the novel anti-rocking bearing reduces both the vertical displacement difference and the rocking angle of the isolation layer. The bearing exhibits a certain level of anti-rocking effect, but it may cause significant tensile forces in some bearings. The effectiveness of the anti-rocking effect improves as the stiffness of the steel tension rod in the bearing increases. For structures equipped with the novel anti-rocking bearing, the acceleration amplifies under most cases, with amplification coefficients ranging from 0.82 to 1.55. Through the finite element simulation of the bearing, the mechanical properties of the bearing are essentially the same as the theoretical analysis results.

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Seismic performance upgrading of containment structures using a negative-stiffness amplification system

Cited by 37 publications

References 40 publications

Optimum design and performance of a base-isolated structure with tuned mass negative stiffness inerter damper

Optimum design and performance of a base-isolated structure with tuned mass negative stiffness inerter damper

Design and Performance Assessment of Base Isolated Structures Supplemented with Vibration Control Systems

Design and Analysis of Novel Anti-Rocking Bearing

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