Analytical and numerical modelling of shear-link device for seismic energy dissipation in frame structures

Nuzzo, Iolanda; Losanno, Daniele; Cilento, Fabrizia; Caterino, Nicola

doi:10.1016/j.engstruct.2020.110630

Cited by 9 publications

(4 citation statements)

References 29 publications

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“…The passive control system consists of 7 dampers which are mounted between the steel braces and the upper beam, as illustrated in Figure 1. The adopted devices, denominated Shear Links, are metallic dampers, having rate-independent hysteretic behavior, that are manufactured from a I-shaped laminated steel plate [16,17]. As shown in Figure 5(a), this type of device is typically made up of a) vertical stiffeners, that ensure the device stability, b) external flanges, that allow for the device connection to structural elements, and c) dissipative windows, that are capable of dissipating energy.…”

Section: Structure Propertiesmentioning

confidence: 99%

Some Recent Advances on the Modeling of the Hysteretic Behavior of Rate-Independent Passive Energy Dissipation Devices

Vaiana¹,

Napolitano²,

Rosati³

2021

Proceedings of the 8th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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Structures with passive energy dissipation systems are characterized by a complex dynamic behavior due to the hysteretic nature governing the response of the adopted devices. Mathematically speaking, the hysteretic models currently available to simulate the behavior of rate-independent devices, such as metallic and friction dampers, are much more complicated than those developed for rate-dependent devices, such as viscous fluid and viscoelastic solid dampers. To allow for a straightforward, accurate and efficient modeling of rate-independent energy dissipation devices in practice, we introduce a novel phenomenological model suitable for both metallic and friction dampers. Such a model offers the advantage of requiring an easy calibration procedure since it is based on a set of only four parameters having a clear mechanical significance. The proposed model is employed to simulate the actual behavior of some metallic dampers, denominated Shear Links, that have been experimentally tested at the University of Naples Federico II. In addition, numerical simulations are performed to show the capability of such devices in protecting structures from earthquake excitations.

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Section: Structure Propertiesmentioning

confidence: 99%

Some Recent Advances on the Modeling of the Hysteretic Behavior of Rate-Independent Passive Energy Dissipation Devices

Vaiana¹,

Napolitano²,

Rosati³

2021

Proceedings of the 8th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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“…The frequency evaluation index (FEI) compares the target and measured signals in the frequency domain using the fast Fourier transform (FFT), and the equivalent frequency ( ) identifies the cycle frequency where there is the most energy of the signal, as given in Eqs. (6) and (7), respectively. The generalized amplitude, , and generalized angle, , depend on the FEI as expressed in Eqs.…”

Section: Rths Performancementioning

confidence: 99%

“…The first consists in isolating the structure at the base, thus reducing the energy input of the earthquake to the building [1][2][3]. While the second one concentrates in mitigating, through auxiliary devices, the energy that has been transmitted by the earthquake to the structure [4][5][6]. In a conventional design, the building will dissipate this energy through vibrations that can lead to the generation of damage in its structural and non-structural elements.…”

Section: Introductionmentioning

confidence: 99%

Real-Time Hybrid Simulation of a Structure With Circular Fiber Reinforced Isolators

Riascos¹,

Klopov²,

Marulanda³

et al. 2021

Proceedings of the 8th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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More than 87% of the Colombian population lives in zones of intermediate and high seismic hazard, which has generated an increasing interest toward base isolated structures. Nowadays, this technique has been mainly applied to hospitals and bridges. However, it is necessary to expand the action field of isolators to diverse kind of structures in countries with high seismic hazard. In this direction, the performance of circular unbounded fiber reinforced elastomeric isolators (U-FREI) was studied in a two degrees-of-freedom (DoF), medium scale structure, under seismic excitation. This evaluation was achieved employing a Real-Time Hybrid Simulation (RTHS), which is defined as a modern cyber-physical technique used for the experimental evaluation of complex systems, that treats the system components with predictable behavior as a numerical substructure, and the components that are difficult to model as an experimental substructure. In this case, the main structure was considered as the numerical substructure and a couple of U-FREI was treated as the experimental substructure. The RTHS was evaluated using a set of Current Assessment Measurements, where an accurate tracking of the transfer system was determined. Furthermore, the experimental results were compared with Shaking Table Tests (STT) developed at University of Naples Federico II. Particularly, peak and RMS comparison of force and acceleration signals showed a similar behavior of the RTHS according to the STT results. Overall, both approaches demonstrated that the U-FREI were able to reduce more than the 70% of the structural drift with respect to the fixed structure, and the applied RTHS methodology was verified.

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“…In structural dynamics, the problem of evaluating the amount of mechanical energy dissipated by rate-independent hysteretic mechanical systems and materials plays a crucial role since such an issue plays a paramount role in vibrations control. In particular, with reference to the seismic protection of structures and objects contained in them [1], the evaluation of the dissipated energy is necessary for the modeling and design of isolation bearings [2][3][4] and energy dissipation devices [5].…”

Section: Introductionmentioning

confidence: 99%

Some remarks on the evaluation of work and dissipated energy associated with rate-independent hysteretic forces

Capuano

2023

Theoretical and Applied Mechanics - AIMETA 2022

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Abstract. We provide closed-form expressions to compute the path-dependent work performed by generalized rate-independent hysteretic forces, simulated by using a brand-new model denominated Vaiana-Rosati Model (VRM). In particular, such expressions are valid over a generic generalized displacement interval. Furthermore, we provide a closed-form expression for evaluating the dissipated energy associated with the work done by a rate-independent hysteretic force when a full cycle of periodic generalized displacement is applied.

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Analytical and numerical modelling of shear-link device for seismic energy dissipation in frame structures

Cited by 9 publications

References 29 publications

Some Recent Advances on the Modeling of the Hysteretic Behavior of Rate-Independent Passive Energy Dissipation Devices

Some Recent Advances on the Modeling of the Hysteretic Behavior of Rate-Independent Passive Energy Dissipation Devices

Real-Time Hybrid Simulation of a Structure With Circular Fiber Reinforced Isolators

Some remarks on the evaluation of work and dissipated energy associated with rate-independent hysteretic forces

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