Parameter Estimation in Finite Element Simulations of Rayleigh Waves

Zerwer, A.; Cascante, Giovanni; Hutchinson, Jean

doi:10.1061/(asce)1090-0241(2002)128:3(250)

Cited by 109 publications

(44 citation statements)

References 14 publications

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“…Zerwer et al (2002) showed that this can be achieved to a certain extent by taking ø 1 as the first natural frequency of the system and ø 2 as the highest natural frequency of the vibration modes with a high contribution to the response. More recently Kwok et al (2007) recommended, for site response analysis, the use of the site frequency as ø 1 and five times the site frequency (i.e.…”

Section: Rayleigh Dampingmentioning

confidence: 99%

On the relative merits of simple and advanced constitutive models in dynamic analysis of tunnels

Kontoe¹,

Zdravković²,

Potts³

et al. 2011

Géotechnique

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This paper compares simple constitutive models that are widely used in engineering practice with more sophisticated methods in the context of a case study. In particular, four constitutive modelling approaches have been considered: a simple elasto-plastic constitutive model (modified Cam-clay), with and without Rayleigh damping; the same model coupled with a cyclic non-linear model that can simulate pre-yield hysteresis; and finally an advanced kinematic hardening model, which is an improved version of the Al-Tabbaa & Wood two-surface model. These four approaches are used to analyse the seismic response of a section of the Bolu tunnels during the 1999 Duzce earthquake. To shed light on the performance of the constitutive models, simple site response finite-element analyses were first undertaken for the studied site, paying particular attention to the calibration of the Rayleigh damping parameters. The results of these analyses, in terms of maximum shear strain, were then used as input to an analytical elastic method (extended Hoeg method) for calculating the thrust and bending moment acting in the tunnel lining. Finally the results of dynamic time domain plane-strain analyses, employing the four adopted constitutive modelling approaches, are compared against field observations and results obtained by the extended Hoeg method, to investigate the ability of the models, of ranging complexity, to mimic soil response under seismic excitation. On effectue enfin une comparaison des résultats des analyses dans le domaine temporel de la déformation sur un plan, faisant usage des quatre méthodes de modélisation constitutives adoptées, avec les résultats obtenus à l'aide de la méth-ode étendue de Hoeg, pour examiner la capacité pour des modèles de complexité variable de simuler la réaction des sols à une excitation sismique. INTRODUCTIONUnderstanding the behaviour of geotechnical structures such as tunnels, earthfill dams and retaining walls during earthquakes is recognised as a necessary condition for their rigorous and safe seismic design. In order to predict the seismic response of these structures correctly, it is essential to develop and use constitutive models that can simulate soil behaviour appropriately under dynamic loading. Numerical analysis has developed significantly over the last decades, and nowadays a wide range of constitutive models is available. Equivalent linear models and simple non-linear models are used with acceptable accuracy for situations involving small to medium strains, whereas for higher strain levels coupling of a non-linear model with an elasto-plastic model, or the use of more advanced models, is needed. However, not all of the above-mentioned types of models are available in commercial codes. Therefore in engineering practice very simple elasto-plastic models (e.g. Mohr-Coulomb and/or

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Section: Rayleigh Dampingmentioning

confidence: 99%

On the relative merits of simple and advanced constitutive models in dynamic analysis of tunnels

Kontoe¹,

Zdravković²,

Potts³

et al. 2011

Géotechnique

View full text Add to dashboard Cite

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“…The two parameters of a and b in the Rayleigh damping model are related to the actual damping ratio, n, with two angular frequencies, x 1 and x 2 , as [23] a ¼ 2nx 1 x 2 x 1 þ x 2 and b ¼ 2n…”

Section: Finite Element Model Of the Track And Vehiclementioning

confidence: 99%

Dynamic subsoil responses of a stiff concrete slab track subjected to various train speeds: A critical velocity perspective

Nsabimana

Jung

2015

Computers and Geotechnics

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“…In the purpose of simulating the wave propagation, the mesh size also controls to construct the completeness of waveform. Ihlenburg (1998) proposed the use of 5 to 10 elements to represent a wavelength, and Zerwer et al (2002) minimized it as 4 elements. Moser et al (1999) conservatively recommends the use of 20 elements for a wavelength developed in the media, which was validated in the previous study (Kim et al, 2002).…”

Section: Modelingmentioning

confidence: 99%

Effect of Reinforcing Bar on Rayleigh Wave Propagation on Concrete Structures

Kim

Lee²

2015

Journal of the Korean Recycled Construction Resources Institute

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This paper presents results on a study of the Rayleigh wave scattering in concrete with a steel bar using transient elastic waves. To study the characteristics of the scattered waves induced by a steel bar in concrete, a three-dimensional finite element method was adopted. A case for elastic wave propagation parallel to the steel bar is discussed. The effect of the cover thickness and steel bar diameter on the Rayleigh wave was studied. To confirm the numerical investigations, a concrete specimen containing a steel bar was made, and corresponding transient elastic wave experiments were conducted. It is believed that the result of this study can serve as an important reference in a nondestructive evaluation of concrete with a steel bar. which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited J Rec Const Resources 3(2) 159-164(2015) http://dx

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Parameter Estimation in Finite Element Simulations of Rayleigh Waves

Cited by 109 publications

References 14 publications

On the relative merits of simple and advanced constitutive models in dynamic analysis of tunnels

On the relative merits of simple and advanced constitutive models in dynamic analysis of tunnels

Dynamic subsoil responses of a stiff concrete slab track subjected to various train speeds: A critical velocity perspective

Effect of Reinforcing Bar on Rayleigh Wave Propagation on Concrete Structures

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