Performance-based analysis of cantilever retaining walls subjected to near-fault ground shakings

Aghamolaei, Milad; Azizkandi, Alireza Saeedi; Baziar, Mohammad Hassan; Ghavami, Sadegh

doi:10.1016/j.compgeo.2020.103924

Cited by 11 publications

(8 citation statements)

References 52 publications

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“…No surcharge loadings were applied to the model's upper boundary in the numerical simulations. By conducting the consolidated-drained (CD) triaxial test, the constitutive behavior of soils is observed [45]. In order to simulate the constitutive behavior of granular backfill, the MC material model was applied.…”

Section: Constitutive Modeling Of Base Foundation and Reinforcement B...mentioning

confidence: 99%

Influence of Various Earth-Retaining Walls on the Dynamic Response Comparison Based on 3D Modeling

Akbar,

Pan,

Huang

et al. 2024

CMES

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The present work aims to assess earthquake-induced earth-retaining (ER) wall displacement. This study is on the dynamics analysis of various earth-retaining wall designs in hollow precast concrete panels, reinforcement concrete facing panels, and gravity-type earth-retaining walls. The finite element (FE) simulations utilized a 3D plane strain condition to model full-scale ER walls and numerous nonlinear dynamics analyses. The seismic performance of different models, which includes reinforcement concrete panels and gravity-type and hollow precast concrete ER walls, was simulated and examined using the FE approach. It also displays comparative studies such as stress distribution, deflection of the wall, acceleration across the wall height, lateral wall displacement, lateral wall pressure, and backfill plastic strain. Three components of the created ER walls were found throughout this research procedure. One is a granular reinforcement backfill, while the other is a wall-facing panel and base foundation. The dynamic response effects of varied earth-retaining walls have also been studied. It was discovered that the facing panel of the model significantly impacts the earthquake-induced displacement of ER walls. The proposed analytical model's validity has been evaluated and compared with the reinforcement concrete facing panels, gravity-type ER wall, scientifically available data, and American Association of State Highway and Transportation Officials (AASHTO) guidelines results based on FE simulation. The results of the observations indicate that the hollow prefabricated concrete ER wall is the most feasible option due to its lower displacement and high-stress distribution compared to the two types. The methodology and results of this study establish standards for future analogous investigations and professionals, particularly in light of the increasing computational capabilities of desktop computers.

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Section: Constitutive Modeling Of Base Foundation and Reinforcement B...mentioning

confidence: 99%

Influence of Various Earth-Retaining Walls on the Dynamic Response Comparison Based on 3D Modeling

Akbar,

Pan,

Huang

et al. 2024

CMES

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“…The primary objective of performing nonlinear dynamic time history FE investigations was to assess the earthquake induced displacement of RW. Therefore, the input base excitations (accelerograms) have been selected with increasing peak ground acceleration (PGA) [2]. In the present study, five synthetic [23] and five historical [42] accelerograms were considered with a PGA range from 0.093g to 0.85g.…”

Section: Earthquake Response Of Scaled Down Rw Modelmentioning

confidence: 99%

“…Frictional contact has been modelled between (i) the backfill and the base rock, (ii) the RW stem and the backfill and (iii) the RW heel slab and the backfill. A friction coefficient of 2 3 tan/ has been specified for modelling the frictional surface interaction, where / is the angle of internal friction of the backfill. In order to prevent the mesh penetration and formulate pressure overclosure relation between different frictional contact surfaces, a hard contact has been modelled in the normal direction for all the contact surfaces.…”

Section: Geometric Modelling Surface Interaction Boundary Conditions ...mentioning

confidence: 99%

“…The Mohr Coulomb (MC) material model has been used for modelling the constitutive behaviour of backfill. Several studies used the MC material model for simulating the pre and post yield behaviour of backfill [2,48]. It should be noted herein that the post yield behaviour of soil could also be simulated by providing an extension to the MC material model [43,48].…”

Section: Constitutive Modelling Of the Backfillmentioning

confidence: 99%

“…Bakr [4,5] performed numerical investigations for understanding the earthquake induced displacement of sliding RW and observed that the Newmark sliding block approach overestimates the earthquake induced displacement of sliding RW. Aghamolaei et al [2] performed a detailed numerical investigation for understanding the earthquake induced displacement of free standing RW considering near fault ground excitations and observed high RW displacements for PGA [ 0.4g.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Displacement based seismic assessment of base restrained retaining walls

Tiwari

Lam

2022

Acta Geotech.

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The present work deals with assessment of earthquake-induced displacement of the base restrained retaining walls (RW’s). A detailed and rigorous finite element (FE) investigation has been carried out following the shaking table experiments on a scaled-down RW model. The FE simulations were performed by conducting several nonlinear time history analyses on a two-dimensional (2D) plane strain FE model of a prototype RW. The hardening and softening of backfill have been simulated by calibrating the Mohr Coulomb material model against the triaxial test results. Role of different backfill into the seismic performance of base restrained RW has also been investigated. It was observed that the cohesionless backfill has a slight influence on the earthquake induced displacement of base restrained RW’s. Amplification of horizontal acceleration in backfill has been observed with no direct correlation with the applied earthquake excitation. The understanding and findings based on shaking table experiment and FE simulations have been used for development of an analytical model for estimation of earthquake induced displacement of base restrained RW. The validity of proposed analytical model has also been examined against the shaking table experiment and FE simulation results.

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Influence of soil–pile interface characteristics on the seismic response of single pile foundations: shaking table testing and numerical simulation

Aghamolaei,

Saeedi Azizkandi,

Abolhasanpoor

et al. 2023

Acta Geotech.

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Performance-based analysis of cantilever retaining walls subjected to near-fault ground shakings

Cited by 11 publications

References 52 publications

Influence of Various Earth-Retaining Walls on the Dynamic Response Comparison Based on 3D Modeling

Influence of Various Earth-Retaining Walls on the Dynamic Response Comparison Based on 3D Modeling

Displacement based seismic assessment of base restrained retaining walls

Influence of soil–pile interface characteristics on the seismic response of single pile foundations: shaking table testing and numerical simulation

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