Parametric study on seismic ground response by finite element modelling

Amorosi, A.; Boldini, Daniela; Elia, Gaetano

doi:10.1016/j.compgeo.2010.02.005

Cited by 80 publications

(45 citation statements)

References 23 publications

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“…Amorosi et al [13] presented a new procedure to specify frequency interval in order to obtain a better match between the linear time domain and frequency domain analyses whereas, the first natural frequency (f 1 ) is selected as f m . The value of f n should be selected equal to the frequency where the amplification function gets lower than unity.…”

Section: Calibration Of Damping Ratio For Nonlinear Analysismentioning

confidence: 99%

“…Ciro Visone et al [12] presented a comparative study on frequency and time domain analyses for the evaluation of the seismic response of subsoil to the earthquake shaking by different computer programs. Amorosi et al [13] performed 2D finite element analysis of seismic ground response of a clayey deposit, using linear viscoelastic and visco-elsto-plastic constitutive models, the viscous and linear elastic parameters are selected according to a novel calibration strategy, leading to FE results comparable to those obtained by 1D equivalent-linear visco-elastic frequencydomain analyses.…”

Section: Introductionmentioning

confidence: 99%

“…The analyses were performed under undrained conditions. In Plaxis program it is possible to specify undrained behavior in an effective stress analysis using effective model parameters [16] [5], [13]. The choice of boundary conditions influences the amount of energy dissipation due to the wave propagation in the ground.…”

Section: Numerical Modelsmentioning

confidence: 99%

“…The two lateral domains, characterized by a coarse mesh, to reduce the computational costs [5,13]. It is characterised by width equal to eight times its height, in order to minimize the effect of boundary conditions on the computed results [23].…”

Section: Numerical Modelsmentioning

confidence: 99%

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Modelling of soil damping for Seismic ground response by Nonlinear finite element Analysis

Zidan¹

2015

Third International Conference on Advances in Civil and Structural Engineering - CSE 2015

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In this paper, the nonlinear dynamic behavior of clayey soil using 2D finite element analyses is presented. This paper presents comparative analyses of seismic response by different numerical approaches. The behavior of two types of soil represented the soft and stiff clay is investigated under effect of three different acceleration time histories. The amplification functions of seismic signals obtained by 1D equivalent linear viscoelastic analyses performed in the frequency domain is used to evaluate the initial values of Rayleigh damping (R and R) coefficients to perform the nonlinear finite element analyses. The influences of type of soil and peak ground acceleration on the nonlinear dynamic behavior of soil are studied. The results show a contraction of peak ground acceleration profile and the spectra as compared to the equivalent linear analysis especially in the uppermost portion of the deposit. The rate of increase of shear strain during ground shaking and the permanent shear strain increases as increase of peak ground acceleration for soft soil and linearly for stiff clay. The results obtained by the results indicate that the equivalent linear analysis should not be considered as a right way to modeling strong motion earthquakes especially for soft clay deposit.

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Section: Calibration Of Damping Ratio For Nonlinear Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Numerical Modelsmentioning

confidence: 99%

Section: Numerical Modelsmentioning

confidence: 99%

See 2 more Smart Citations

Modelling of soil damping for Seismic ground response by Nonlinear finite element Analysis

Zidan¹

2015

Third International Conference on Advances in Civil and Structural Engineering - CSE 2015

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“…in Borja and Chao (1999) [5]) and Finite Element (FE) column models (e.g. in Li et al (1998) [24]; Lee et al (2006) [23]; Amorosi et al (2010) [1]). Among the existing approaches for site response analysis, the FE method is the most versatile, as it allows the implementation of advanced constitutive models which can simulate realistically soil behaviour under seismic loading, the rigorous modelling of soil's fluid phase through hydro-mechanical (HM) coupling and the computation of the response in all three directions.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of multi-directional site response based on KiK-net downhole array monitoring data

Han

Zdravković

Kontoe

et al. 2017

Computers and Geotechnics

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Seismic performance of two classes of earth dams

Masini

Rampello

Donatelli³

2020

Earthq Engng Struct Dyn

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In the last decades, Italy has experienced several strong earthquakes, triggering the attention on the high seismic risk associated with the potential instability of large existing earth dams. Under intense seismic events, dam response depends on various factors including the geometry and the type of water retention scheme. This paper explores the influence of these factors, comparing the seismic performance of two idealized earth dams: a homogeneous dam and a zoned dam. The simplified models adopted in the analyses are representative of these two classes of earth dams, often adopted in the sixties to design various dams located in southern Italy. The idealized models, here examined in detail, have comparable heights and foundation soil conditions, differing in terms of water retention scheme. The seismic response of the dams was evaluated through time-domain nonlinear dynamic analyses in which the same input ground motion, represented by real-time histories, was applied at the base of the models. It is shown that for highly inelastic systems, such as those at hand, duration of input motion should be accounted for in addition to compatibility criteria with a design elastic response spectrum. Also, different slopes of dam flanks, shear strength mobilization at the end of dam construction and high stiffness contrast at the shells-core contacts are shown to result in different deformation patterns at the end of earthquake loading. Some peculiarities in the behavior of these classes of earth dams are highlighted in the paper, providing a guidance for the rational assessment of their seismic performance.

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Parametric study on seismic ground response by finite element modelling

Cited by 80 publications

References 23 publications

Modelling of soil damping for Seismic ground response by Nonlinear finite element Analysis

Modelling of soil damping for Seismic ground response by Nonlinear finite element Analysis

Numerical investigation of multi-directional site response based on KiK-net downhole array monitoring data

Seismic performance of two classes of earth dams

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