Seismic Behavior of a Self-Centering System with 2–4 Viscous Damper

Hazaveh, Nikoo K.; Chase, J. Geoffrey; Rodgers, Geoffrey W.; Pampanin, Stefano; Kordani, R.

doi:10.1080/13632469.2018.1453415

Cited by 19 publications

(6 citation statements)

References 19 publications

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“…To examine the eigenfields inside the metamaterial, the volume force is considered as zero. Due to the peculiarity of the structure, equation ( 1) is extended to the elastic wave equation in cylindrical coordinates [17], as shown in equation (2), where u, v and w are the displacement components of the rectangular coordinate system, ρ is the density, t is the time, λ and µ are the elastic wave constants of material, and r, θ and z are the coordinates in cylindrical coordinates:…”

Section: Theoretical Methodsmentioning

confidence: 99%

“…A large such as earthquakes mainly includes energy dissipation and shock absorption methods, where additional passive energy dissipation devices are used to protect the building structure. Although these methods are generally effective, they cannot adapt to structural changes [1,2]. Further, they cannot be utilized for existing buildings of historical, cultural or strategic importance.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Radial seismic metamaterials with ultra-low frequency broadband characteristics

Li¹,

Jia²,

Tong³

et al. 2021

J. Phys. D: Appl. Phys.

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The metamaterials applications for protecting buildings by manipulating seismic waves, such as nuclear power plants and ancient buildings protection, have garnered considerable attention. A new type of ultra-low frequency broadband radial seismic metamaterial (RSM) has been proposed in this paper. Contrary to traditional seismic metamaterials (SMs), the proposed RSMs are arranged with radially periodic steel rings embedded in the soil. The propagation characteristics of seismic Lamb waves and surface waves in RSM are investigated. Additionally, the dispersion relations and displacement vector fields are determined by using the finite element method. As the numerical discussion, lower and wider bandgap characteristics for seismic Lamb waves and surface waves are shown in RSM in contrast to the SM. For seismic Lamb waves, the RSM with rectangular cross-section exhibits the beginning frequency of bandgaps as low as 1.6 Hz, with a bandwidth ratio of 81.27% increased by 65.33% relative to the SM in the range of 0.1-50 Hz, which is produced by the coupling between the seismic Lamb modes and local resonance; for surface waves, RSM also has a low-frequency broadband and larger relative band width of bandgap (57.5%) than the SM with the same lattice constant and filling fraction, which is caused by coupling of the overall axial resonance and Rayleigh waves mode. Furthermore, the influence of geometric parameters and material properties of RSM on bandgap characteristics is obtained. Finally, a 3D full-scale finite period model, which involves in-plane and out-of-plane modes, is designed to demonstrate the earthquake shielding performance of RSM. The proposed shielding approach could provide a better alternative in the field of seismology and related areas of ultra-low frequency vibration damping or blast protection.

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Section: Theoretical Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Radial seismic metamaterials with ultra-low frequency broadband characteristics

Li¹,

Jia²,

Tong³

et al. 2021

J. Phys. D: Appl. Phys.

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“…The loading test of the new damper is conducted by MTS (as shown in Figure 4) (Hazaveh et al, 2020; Jamshidiha and Yakhchalian, 2019; Janbazi Rokni and Tabeshpour, 2019; Li et al, 2020; Noruzvand et al, 2020). Before the initial loading, the damper is preloaded.…”

Section: Performance Test Of the Mps-stf-vfdmentioning

confidence: 99%

Experimental investigation of a novel high performance multi-walled carbon nano-polyvinylpyrrolidone/silicon-based shear thickening fluid damper

Sun,

Wang,

Zhang

2024

Journal of Intelligent Material Systems and Structures

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A novel high performance multi-walled carbon nano-polyvinylpyrrolidone/silicon-based shear thickening fluid (MWCNTs-PVP/SiO2-STF), abbreviated and subsequently referred to as MPS-STF, is developed in this paper. The rheological properties of the MPS-STF are investigated, and the viscosity model of MPS-STF is established. Furthermore, the MPS-STF based viscous fluid damper (MPS-STF-VFD) is designed according to the rheological characteristics of the novel fluid. The impact of loading frequencies, displacement amplitudes and the numbers of piston holes on the dynamic performance of the damper is studied through sophisticated multiple cases loading tests using MTS facility. The test results show that the loading frequency, displacement amplitudes and the number of piston holes have great influence on the rheological properties of MPS-STF. This directly affects the maximum damping force and heat dissipation capacity of MPS-STF-VFD. Finally, the mechanical model of the damper is established based on the principle of fluid mechanics. The simulation results agree well with the experimental data. The high damping performance of the MPS-STF-VFD can be achieved based on the characteristics of the modified fluid. Relevant results reported in this paper can provide an important solution for the development and application of damping technology in engineering structures.

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“…In this configuration, the movement toward the positive direction closes the valves of Piston 1 and opens the valves of Piston 2, while the opening and closing of the pistons is inversed in the negative direction (Figure 26). Even if these devices are promising, they were investigated only in laboratory tests [176], and, to the Authors' knowledge, neither numerical tests on actual structures nor applications on real structures have been reported. Hormozabad and Zahrai [166] proposed the adaptive viscous damper (AVD) depicted in Figure 27.…”

Section: Adaptive Fluid Viscous Dampermentioning

confidence: 99%

Current Trends in Fluid Viscous Dampers with Semi-Active and Adaptive Behavior

Zoccolini,

Bruschi,

Cattaneo

et al. 2023

Applied Sciences

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Fluid viscous dampers (FVDs) have shown their efficiency as energy-dissipating systems, reducing the effects induced on structures by dynamic loading conditions like earthquakes and winds. In this paper, the evolution of this technology is reviewed, with a focus on the current trends in development from passive to semi-active and adaptive systems and an emphasis on their advances in adaptability and control efficacy. The paper examines the implementation of semi-active FVDs such as electrorheological, magnetorheological, variable stiffness, and variable damping dampers. These devices have a high potential to mitigate the vibrations caused by earthquakes of different intensities. In addition, adaptive FVDs are presented. As semi-active devices, the adaptive ones can adjust their behavior according to the dynamic excitations’ intensity; however, they are able to do that autonomously without the use of any external equipment.

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Seismic Behavior of a Self-Centering System with 2–4 Viscous Damper

Cited by 19 publications

References 19 publications

Radial seismic metamaterials with ultra-low frequency broadband characteristics

Radial seismic metamaterials with ultra-low frequency broadband characteristics

Experimental investigation of a novel high performance multi-walled carbon nano-polyvinylpyrrolidone/silicon-based shear thickening fluid damper

Current Trends in Fluid Viscous Dampers with Semi-Active and Adaptive Behavior

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