Parameter identification of degrading and pinched hysteretic systems using a modified Bouc–Wen model

Pelliciari, Matteo; Marano, Giuseppe Carlo; Cuoghi, Tommaso; Briseghella, Bruno; Lavorato, Davide; Tarantino, Angelo Marcello

doi:10.1080/15732479.2018.1469652

Cited by 55 publications

(34 citation statements)

References 41 publications

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“…Stiffness and strength degradation have been described above by establishing proper degrading functions of the damage index. However, as already pointed out by Pelliciari et al (2018), the rate of degradation of the stiffness of a system might not always maintain the same proportionality to the energy (in this case to the damage index). For instance, the degradation rate could be stronger at the beginning of the inelastic phenomena.…”

Section: Stiffness and Strength Degradationmentioning

confidence: 94%

“…It goes without saying that this is not a strict definition, being the nature of pinching accidental and extremely complex. Nevertheless, this definition was employed by Marano et al (2017) and Pelliciari et al (2018), obtaining promising results from the application on RC bridge piers.…”

Section: Pinching Effectmentioning

confidence: 99%

“…Nevertheless, its mathematical formulation does not include degradation phenomena. Indeed, numerous authors extended its governing equations in order to consider the degradation of the system (see, e.g., Baber & Noori, 1985;Erlicher & Bursi, 2008;Kottari, Charalampakis, & Koumousis, 2014;Pelliciari et al, 2018). In particular, the Bouc-Wen-Baber-Noori (BWBN) model (Baber & Noori, 1985) has been considerably successful.…”

Section: Introductionmentioning

confidence: 99%

“…Stiffness degradation and strength degradation are defined through a damage index that involves both maximum displacement and dissipated energy. Moreover, the pinching effect is depicted along the same lines of the simple formulation proposed by Pelliciari et al (2018), incorporating modifications that correct its physical deficiencies.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A degrading Bouc–Wen model for the hysteresis of reinforced concrete structural elements

Pelliciari

Briseghella

Tondolo

et al. 2019

Structure and Infrastructure Engineering

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This paper presents a smooth hysteresis model for reinforced concrete structural elements based on the differential equation of the Bouc-Wen model. Stiffness degradation and strength degradation are defined by introducing a damage index that includes both dissipated energy and maximum displacement. The pinching effect acts directly on the stiffness of the system and is controlled by an activation energy. The degrading functions are connected to the actual processes with which the damage occurs, thereby giving each parameter a physical meaning. The simple formulation of the model allows a straightforward identification of the best fitting parameters and an easy interpretation of the results. Applications to the cyclic behaviour of reinforced concrete structural elements demonstrate that the model is well capable of describing complex hysteretic behaviours involving degradation and pinching effects.

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Section: Stiffness and Strength Degradationmentioning

confidence: 94%

Section: Pinching Effectmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A degrading Bouc–Wen model for the hysteresis of reinforced concrete structural elements

Pelliciari

Briseghella

Tondolo

et al. 2019

Structure and Infrastructure Engineering

Self Cite

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“…The genetic algorithm is perhaps one of the most commonly used algorithms. Pelliciari et al identified the hysteretic behavior of bridge piers based on the modified Bouc–Wen model. Sireteanu et al identified seismic protection devices and other related studies .…”

Section: Introductionmentioning

confidence: 99%

Identification of nonlinear hysteretic systems using sequence model‐based optimization

Jiang

Wen

Han

et al. 2020

Struct Control Health Monit

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Summary Identification of nonlinear hysteretic systems has practical significance for the prediction of structural response. This paper develops a novel parameter identification method for nonlinear hysteretic systems. The Bouc–Wen model and its improved models are used to parametrically characterize the structural systems. Model parameters are identified using a given load‐displacement trajectory. The proposed method is developed under the framework of the sequence model optimization, which provides a broader search domain and needs fewer iterations. Firstly, a series of sensitivity analyses were conducted to investigate the effects of the Bouc–Wen parameters on the hysteresis behavior and to guide the identification process. Subsequently, based on the framework of the sequence model optimization, a novel strategy for identifying the model parameters of the nonlinear hysteresis system was proposed. Finally, the effectiveness and accuracy of the proposed algorithm were verified by the experimental data and numerical simulation results. The results indicate that the identified numerical model can accurately capture the strength and stiffness degradation and the pinching effect of the structural system. As a result, the predicted hysteretic trajectories are well agreed with the actual structural responses. The case studies demonstrate that the proposed method is sufficiently accurate and computationally efficient for the nonlinear hysteretic systems.

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Experimental and analytical study of Friction Connection for seismic retrofit with Cross‐Laminated Timber (CLT) panels

Boggian

Aloisio

Tomasi

2022

Earthq Engng Struct Dyn

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Within the European project e-SAFE (Energy and Seismic AFfordable rEnovation solutions), this paper presents the experimental tests and modeling attempts for a class of Asymmetric Friction Connections (AFCs) tested in the laboratories of the Norwegian University of Life Sciences. The AFCs are part of the seismic retrofitting solution, called e-CLT, based on installing Cross-Laminated Timber (CLT) panels in reinforced concrete structures using friction connections. The authors carried out experimental tests on AFCs fixed with screws to a CLT panel to observe the contribution of timber to the total dissipation performance. The investigation is based on 20 cyclic test data with two different setups. The main one includes a CLT panel and screw connection, while the second one isolates the friction behaviour to evaluate the influence of the screw connection. A modified LuGre hysteresis model for friction is developed to simulate the experimental cyclic response of the tested specimen. The model possesses a direct physical meaning, and it explicitly depends on the slip force and the pre-slip stiffness.The optimized model is used to assess the performance of the AFC by varying the pre-slip stiffness and the slip force.

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Parameter identification of degrading and pinched hysteretic systems using a modified Bouc–Wen model

Cited by 55 publications

References 41 publications

A degrading Bouc–Wen model for the hysteresis of reinforced concrete structural elements

A degrading Bouc–Wen model for the hysteresis of reinforced concrete structural elements

Identification of nonlinear hysteretic systems using sequence model‐based optimization

Experimental and analytical study of Friction Connection for seismic retrofit with Cross‐Laminated Timber (CLT) panels

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