Static and dynamic analysis of two mechanically stabilized earth walls

Capilleri, P.; Ferraiolo, F.; Motta, E.; Scotto, M.; Todaro, M. T.

doi:10.1680/jgein.18.00034

Cited by 28 publications

(7 citation statements)

References 21 publications

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“…2D numerical models using FEM and FDM approaches have been used to simulate the performance of hard face concrete walls constructed with discontinuous steel and polymeric strip reinforcement (e.g. [2,9,13,17,19,21,23,49,53]), and steel anchors [46]. However, in these studies it was necessary to convert the discrete reinforcing strips to equivalent continuous layers.…”

Section: Prior Related Workmentioning

confidence: 99%

3D modelling of strip reinforced MSE walls

et al. 2020

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This paper reports the results of 3D numerical modelling of a 6-m-high mechanically stabilised earth (MSE) wall constructed with concrete panels and steel or polymeric strip reinforcement. These systems pose numerical challenges as a result of the discontinuous reinforcement arrangement which is not the case for MSE walls constructed with continuous reinforcement layer configurations. Details of the numerical approach including modelling of the reinforcement strips, concrete facing panels and compressible bearing pads between panels are described. Examples of numerical predictions for facing deformations, toe loads due to soil down-drag behind the panels, soil and reinforcement settlements, and reinforcement tensile loads are presented. The influence of reinforcement stiffness is demonstrated by comparing numerical predictions for the same MSE wall with relatively inextensible steel strips and with relatively extensible polymeric strips. Of particular interest are the results showing the disruption of earth pressures along vertical and horizontal planes in the reinforced soil zone as a result of the discontinuous strip inclusions, and the vertical load that accumulates on the reinforcement strips close to the connections due to soil settlement behind the facing. The details of the modelling approach used here and the lessons learned provide a benchmark for future similar lines of investigation and for practitioners, particularly as the computational power of desktop computers continues to increase. Keywords 3D modelling Á Finite element modelling Á Mechanically stabilised earth (MSE) walls Á Polymeric strip reinforcement Á Soil retaining walls Á Steel strip reinforcement Electronic supplementary material The online version of this article (

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Section: Prior Related Workmentioning

confidence: 99%

3D modelling of strip reinforced MSE walls

et al. 2020

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“…£ max = £1 max − £2 max (12) Fig. 6 depicts the seismic body force (M1 CD ) and dynamic soil force per unit width of the ER (M2 CD ) along the wall height (assuming a triangular distribution) for the ER wall stem.…”

Section: Simplified Analytical Modelmentioning

confidence: 99%

“…Estimating earthquake-induced elastic movement in a base-restrained retaining wall with granular backfill can be achieved using the processes described in Eqs. ( 5) through (12).…”

Section: Simplified Analytical Modelmentioning

confidence: 99%

“…Shaking table experiments and finite element FE simulations are commonly employed in evaluating lateral pressure, reinforcement settlements, deflection, and displacement in ER walls [11]. The accuracy of the FE technique in predicting backfill pressure on earth-retaining walls was established by the researchers in [12] through their numerical simulations of various varieties of ER walls. A study [13] determined that the lateral force exerted on quay walls is substantially affected due to the wall's height and the lateral seismic coefficient.…”

Section: Introductionmentioning

confidence: 99%

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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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“…The soil properties used for verification modeling were the same as the experimental data (see Table 4). Detailed information of the field instrumentation can be found in [24,25]. Figure 5 shows details of the FE numerical model and mesh generated for the full-scale reinforced soil wall comparison and verification purposes.…”

Section: Numerical Modeling Verificationmentioning

confidence: 99%

Numerical Study of the Influence of the Interaction Distance, the Polymeric Strips Pre-Tensioning, and the Soil–Polymeric Interaction on the Performance of Back-to-Back Reinforced Soil Walls

2022

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This study describes the results of a series of 2D finite element method (FEM) numerical models of 6 m high back-to-back reinforced soil walls using the geotechnical software PLAXIS. These structures are used to support embankments, especially for bridge abutment approaches. The quantitative influence of problem geometry, strip pre-tensioning, strip type, and surcharging on horizontal displacements, development of soil shear and plastic zones, lateral earth pressure, and reinforcement loads is presented. The numerical results demonstrate that the back-to-back reinforced soil walls perform jointly when the distance of interaction between the two opposite walls is greater than the interaction distance, which is defined in FHWA, and is contrary to the results of the FHWA design guideline. The walls of the two opposing sides interact with each other when they are close enough and with an overlapping reinforcement layout. Pre-tensioning load can contribute to achieving vertical wall-facing alignment at the end of construction. Using perforated/holed strips, the tensile loads at the end of construction were reduced by about 30% due to the improved polymeric–soil interface strength and stiffness.

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Static and dynamic analysis of two mechanically stabilized earth walls

Cited by 28 publications

References 21 publications

3D modelling of strip reinforced MSE walls

3D modelling of strip reinforced MSE walls

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

Numerical Study of the Influence of the Interaction Distance, the Polymeric Strips Pre-Tensioning, and the Soil–Polymeric Interaction on the Performance of Back-to-Back Reinforced Soil Walls

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