Numerical simulation of centrifuge tests on homogeneous and heterogeneous soil models

Chakrabortty, Pradipta; Popescu, Radu

doi:10.1016/j.compgeo.2011.11.008

Cited by 27 publications

(12 citation statements)

References 25 publications

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“…The earthquake energy also can be expressed in terms of Arias Intensity (AI) [5]. This AI can be represented as damage potential of an earthquake [16].…”

Section: Resultsmentioning

confidence: 99%

“…It can also be observed from these figures that the amplification is higher in homogenous soil model as compared to that in heterogeneous soil. One most important reason behind this is that the EPWP generation is more in heterogeneous soil than that in homogenous soil which causes more softening of heterogeneous soil layers [5].…”

Section: Resultsmentioning

confidence: 99%

“…Karimi and Dashti (2015) presented the performance of layered soil using physical and numerical modeling [4]. Chakrabortty and Popescu (2012) presented some experimental and numerical modeling on uniform and heterogeneous soil [5]. It was concluded from these studies that soil heterogeneity adversely affecting the seismic performance.…”

Section: Introductionmentioning

confidence: 99%

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One-Dimensional Seismic Energy Transmission Along Heterogeneous Layered Soil

Das

Chakrabortty

2016

ijsrtm

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In this present study an initiative has been taken to find out the modification in the seismic energy along distance its travel because of the soil heterogeneity. Soil heterogeneity is considered here in one dimensional analysis and analyses were performed using software DEEPSOIL. Both equivalent linear and nonlinear analyses were performed on homogenous and heterogeneous soil models: uniform loose sand, uniform soft clay and layered soil deposit of sandwiched clay layer between loose sandy soils. The performances of these soil models are compared here in terms of peak ground acceleration (PGA) value, and seismic energy migration in terms of Arias Intensity (AI) evolution along the depth inside the soil deposit. It is observed from the analysis that, less seismic energy and PGA is developed in the heterogeneous soil than that in homogeneous soil. This is because during earthquake more softening is taking place in the layered soil than that in uniform soil. Further in this paper the requirement of nonlinear analysis over the equivalent linear analysis is also presented.

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“…The earthquake energy also can be expressed in terms of Arias Intensity (AI) [5]. This AI can be represented as damage potential of an earthquake [16].…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

One-Dimensional Seismic Energy Transmission Along Heterogeneous Layered Soil

Das

Chakrabortty

2016

ijsrtm

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“…In this section, the vertical loading is 500 N, the frequency of excitation is 16 Hz, the dimensionless width of the rigid foundation is W 0.2, the dimensionless depth for the topsoil layer is H T 1, and the dimensionless depth for the subsoil layer is H S 5. In addition, the dimensionless distance for calculation points on the ground surface is from 0.1 to 4 away from the vibration source, with an interval of 0.05. e detailed calculation parameters of soil and Duxseal which refer to the works of Pak et al [8] and Chakrabortty and Popescu [10] are listed in Table 1.…”

Section: Vibration Isolation For Duxsealmentioning

confidence: 99%

Numerical Analysis on the Ground Vibration Isolation of Duxseal

Meng

Tian

et al. 2019

Advances in Civil Engineering

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A new kind of vibration screening material, Duxseal, with a high damping ratio is proposed to be used as an active vibration barrier in the free field. To investigate the influence of width, thickness, and embedded depth of using Duxseal on vibration reduction, numerical studies are performed using a three-dimensional (3D) semianalytical boundary element method (BEM) combined with a thin-layer method (TLM). The isolation effectiveness of Duxseal in ground vibration is also compared with the traditional wave impeding block (WIB). The numerical results show that Duxseal performed exceedingly well in screening ground vibrations in the free field. The effectiveness of the vibration isolation increases with the increase in the width, thickness, and embedded depth of the Duxseal material, within a certain range, under harmonic vertical excitation. In addition, Duxseal is much more effective for isolating ground vibration than the traditional WIB. The performance of Duxseal in isolating ground vibration is relatively stable along the distance away from the vibration source, while the amplitude attenuation ratio bounces upward when the distance away from the vibration source increases for the WIB isolation system.

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“…Laboratory tests in heterogeneous soils have shown that the ∆p w is generated first in loose deposits and when water migrates to neighboring dense sand, it is softened and eventually liquefied. This interaction also affects the liquefactioninduced settlements (Coelho et al 2004, Dashti et al 2010, Chakrabortty and Popescu 2012. Extensive research has been performed on the calculation of these settlements but rarely they include the variability of soil properties and modeling of different soil deposits (Koutsourelakis et al 2002, among others).…”

Section: Introductionmentioning

confidence: 99%

Numerical modeling of discrete spatial heterogeneity in seismic risk analysis: Application to treated ground soil foundation

Montoya-Noguera¹,

Lopez-Caballero²,

Modaressi-Farahmand-Razavi³

2014

Computer Methods and Recent Advances in Geomechanics

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co-seismic settlements of the structure and the liquefaction of the soil deposit are estimated for different effectiveness levels-measured by mixture fractionsand for different spatial distributions. In general, both very small or very high mixture fractions presented low efficiency as the improvement in the relative settlement was small. Additionally, results show that the interaction between loose and dense deposits is highly dependent on the spatial distribution. Therefore, homogeneous equivalent models will rarely correspond to the average of the heterogeneous response.

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Numerical simulation of centrifuge tests on homogeneous and heterogeneous soil models

Cited by 27 publications

References 25 publications

One-Dimensional Seismic Energy Transmission Along Heterogeneous Layered Soil

One-Dimensional Seismic Energy Transmission Along Heterogeneous Layered Soil

Numerical Analysis on the Ground Vibration Isolation of Duxseal

Numerical modeling of discrete spatial heterogeneity in seismic risk analysis: Application to treated ground soil foundation

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