Seismic resilient design and negative stiffness-assisted nonlinear isolation system for adjacent non-coaxial buildings linked by corridors

Hu, Xiuyan; Zhao, Zhipeng; Zhang, Ruifu; Yang, Kai; Chen, Qingjun; Weng, Dagen

doi:10.1016/j.soildyn.2023.108227

Cited by 4 publications

(1 citation statement)

References 39 publications

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“…A coupled vibration control system with suitable negative stiffness can significantly reduce the peak transfer function of the primary structure compared to a vibration control system without negative stiffness 60 . In addition, negative stiffness can address the torsional effect generated in non-coaxial adjacent building structures, thus enhancing the nonlinear energy dissipation effects of the vibration isolation system 61 . The combination of negative stiffness elements and flexible supports realizes a larger equivalent damping force 62 .…”

Section: Introductionmentioning

confidence: 99%

Parameter optimization of vibration control system for adjacent building structures based on negative stiffness inerter damper

Kang,

Tang,

Wei

et al. 2024

Sci Rep

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Building structures are subjected to strong earthquakes, which result in lateral collisions between them. Such collisions often cause severe structural damage and exacerbate the seismic hazard risk of building structures during earthquake events. This paper discusses the application of vibration control devices based on negative stiffness inerter damper in single-story adjacent building structures. The dynamic equations of the vibration control system containing different types of negative stiffness inerter damper under seismic excitation are established as a unified model. The H2 norm theory and Monte Carlo pattern search method are used to optimize the design parameters to improve the vibration control performance of the system, and the dynamic characteristics of the system are investigated. The results demonstrate that attaching negative stiffness inerter damper to adjacent building structures can effectively improve the overall seismic capacity reserve of the building and reduce the risk of collision of adjacent building structures; improve the robustness and stability of the system, and better reduce the displacement response of the building structure under seismic excitation. In addition, the potential of NSID-based vibration control devices to convert seismic energy into usable electricity has been investigated.

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Section: Introductionmentioning

confidence: 99%

Parameter optimization of vibration control system for adjacent building structures based on negative stiffness inerter damper

Kang,

Tang,

Wei

et al. 2024

Sci Rep

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Feasibility and design of nonlinear negative‐stiffness isolating approach for solid‐rocket‐motor‐type structures

Wang,

Gao,

Wang

et al. 2024

Engineering Reports

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Solid rocket motor (SRM)‐type structures are popular due to their reliability, considering that service safety during transportation can be improved by applying advanced vibration control technologies. In this study, a negative‐stiffness‐enhanced isolation system (NSeIS) with appropriately designed linear and nonlinear properties was developed to vertically isolate SRMs subjected to transportation‐ and deployment‐induced vibrations. The NSeIS design, based on the combination of a negative‐stiffness device and vertical isolator, involved a clear mechanical model, physical realization, and mechanical properties. Parametric analyses were performed on a typical SRM controlled with a linear and nonlinear NSeIS and a conventional isolation system. Subsequently, a feasible parameter domain and design recommendations were deduced. Finally, design cases for the SRM for time‐domain verification were considered. The results revealed that the NSeIS offers a flexible and enhanced isolating effect through the parallel arrangement of the negative‐stiffness device and conventional isolators. For the motor‐type structure, NSeIS ensures marked enhancements in performance and multiple levels of mitigation effects. Thus, compared with a conventional isolator with the same damping, NSeIS achieves a more substantial negative‐stiffness effect for a large displacement response range owing to its nonlinear property. NSeIS can isolate more vibration‐induced energy, thereby suppressing the interface Mises stress, which is essential for SRM‐type structures.

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Multi-level stiffness property and isolating-based design of high damping rubber bearings

Zhang,

2024

AIP Advances

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This study presents the development and analysis of high damping rubber bearings (HDRBs) with enhanced stiffness properties to improve seismic isolation performance. The proposed HDRBs exhibit displacement-dependent nonlinear stiffness and significant damping effects, especially under large deformations caused by various seismic events. A deformation history integral model, calibrated with experimental data, is employed to accurately simulate the mechanical behavior and stiffness-damping characteristics of the HDRBs. The numerical simulations are validated through experimental tests, providing a solid basis for parameter design and performance assessment. The results show that the equivalent stiffness coefficient of the HDRBs increases with deformation amplitude, effectively limiting extreme deformations. Parametric analyses and case studies across a wide range of earthquake scenarios demonstrate that the enhanced stiffness and high damping effects of HDRBs significantly improve seismic isolation efficiency while controlling isolation layer displacement. The performance-based design methodology developed in this research effectively limits bearing deformation, thereby preventing potential superstructure failures. Moreover, the adaptive characteristics of the HDRBs allow for the adjustment of deformation levels according to seismic intensity, ensuring the structural safety of buildings under varying earthquake conditions.

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Seismic resilient design and negative stiffness-assisted nonlinear isolation system for adjacent non-coaxial buildings linked by corridors

Cited by 4 publications

References 39 publications

Parameter optimization of vibration control system for adjacent building structures based on negative stiffness inerter damper

Parameter optimization of vibration control system for adjacent building structures based on negative stiffness inerter damper

Feasibility and design of nonlinear negative‐stiffness isolating approach for solid‐rocket‐motor‐type structures

Multi-level stiffness property and isolating-based design of high damping rubber bearings

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