Experimental studies of seismic soil pressures on vertical flexible, underground structures and analytical comparisons

Keykhosropour, Lohrasb; Lemnitzer, Anne

doi:10.1016/j.soildyn.2018.12.012

Cited by 14 publications

(7 citation statements)

References 28 publications

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“…Aluminium plate of 0.4 m length, 0.4 m width and 4 mm thickness has been used to retain the backfill. Similar kind of experimental setup has also been adopted by various researchers to study seismic behaviour of RW [13,19]. It should be noted herein that the scaling effects in backfill such as particle size, particle-to-particle interaction and surface irregularities could affect the seismic response of scaled down RW.…”

Section: Construction Of Scaled Down Rw Modelmentioning

confidence: 99%

“…Ortiz et al [40] performed centrifuge experiments on flexible RW and observed nonlinear distribution of backfill pressure behind the RW. Several researchers performed shaking table investigations on scaled down RW models for understanding the dynamic backfill pressure on RW and its various failure modes [13,17,19,24,28]. Mikola and Sitar [32] performed centrifuge experiments and numerical investigations on different RW's and reported that the MO method can adequately estimate the backfill pressure on RW.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Construction Of Scaled Down Rw Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Displacement based seismic assessment of base restrained retaining walls

Tiwari

Lam

2022

Acta Geotech.

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“…They can be generalized into elastoplastic nonlinear relations as shown in Fig. 17 for determining , , NCHRP and NAVFAC recommend applying Rankine's theory log spiral graphs for regular and regular backfill configuration, whereas Coulomb's experimental failure wedge methodology is Rankine's concept to be usually additional conservative on active pressure, while logarithmic spiral is to be a realistic description of passive pressure [69,70]. Table 1.…”

Section: Discrete Earth Pressure Distribution In Designmentioning

confidence: 99%

A Review: Study of Integral Abutment Bridge with Consideration of Soil-Structure Interaction

Naji¹,

Firoozi

Firoozi³

2020

Lat. Am. j. solids struct.

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Bridges are one of the most critical parts of transportation networks that may suffer damages against earthquakes. Also, seismic responses of most bridges are significantly influenced by soil-structure interaction effects. Taking out expansion joints in the bridges may cause many difficulties in design and analysis due to the complexity of soil-structure interaction and nonlinear behavior. The secondary loads on an IAB include seismic load, temperature variation, creep, shrinkage, backfill pressure on back wall and abutment, all of which cause superstructure length and stress variations in girder changes. The purpose of this study is to recognize the most effective parameters of analysis IABs. Findings show that the backfill material behind the IABs has a significant effect on the performance of IABs. Using a compressible material behind the abutments would enhance the in-service performance of IABs. Finally, behaviour of abutment may be greatly affected by thermal load and soil pressure. Thermal expansion coefficient significantly influences girder axial force, girder bending moment, and pile head/abutment displacement.

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“…According to the study, FE analysis could calibrate a nonlinear distribution of backfill pressure behind a flexible ER wall [17]. Shaking tables and finite element analysis have been employed in many research endeavors to enhance understanding of the force-dynamic positions of backfill on ER walls and the diverse mechanisms of failure they entail [18,19]. It was determined that the backfill soil could substantially affect the seismic performance of ER walls.…”

Section: Introductionmentioning

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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Experimental studies of seismic soil pressures on vertical flexible, underground structures and analytical comparisons

Cited by 14 publications

References 28 publications

Displacement based seismic assessment of base restrained retaining walls

Displacement based seismic assessment of base restrained retaining walls

A Review: Study of Integral Abutment Bridge with Consideration of Soil-Structure Interaction

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

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