Supporting mechanism of rigid-flexible composition retaining structure in sand ground using discrete element method

Zhang, Xiaoyong; Wang, Tiancheng; Zhao, Chenyang; Jiang, Mingjie; Xu, Meijuan; Mei, Guoxiong

doi:10.1016/j.compgeo.2022.104967

Cited by 12 publications

(2 citation statements)

References 46 publications

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“…This should help to reduce the influence of the boundaries on the results obtained, although there is no clear indication in the literature on this aspect. Recently, various research [1] showed a case of site response analysis in which they kept the width of the model eight times its height, in order to obtain acceptable results. The soil is schematized as an elasto-plastic layer which is implemented in the Plaxis code.…”

Section: Numerical Modelingmentioning

confidence: 99%

The behaviour of a retaining wall under seismic excitation

Boudina

Bounouni²,

Rouabeh³

et al. 2023

TSSJ

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In this research, the different methods to calculate the earth pressures on a retaining wall were exposed, for different loading conditions, namely static and dynamic. The dynamic response of a retaining wall under seismic loading was also studied. The simulation is done using the finite element code PLAXIS. The response is expressed in terms of acceleration and displacement. When using numerical models to study this type of problem, two different entities can be identified. The first one corresponds to the materials and the consideration of their behavior. The second part corresponds to the type of loading imposed, i.e. the input signal.

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Section: Numerical Modelingmentioning

confidence: 99%

The behaviour of a retaining wall under seismic excitation

Boudina

Bounouni²,

Rouabeh³

et al. 2023

TSSJ

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“…Compared with the continuous medium and small deformation assumed in the finite element method, DEM allows translation, rotation, and even separation between the particles. Furthermore, it has been demonstrated in the literatures [9][10][11][12][13][14][15][16][17] that DEM can describe the geometry of shear localization in soil mass behind the retaining structures. In recent years, the discrete element method has been frequently applied to examine the earth pressure acting on retaining structures.…”

Section: Introductionmentioning

confidence: 99%

Discrete element analysis and analytical method on failure mechanism of retaining structures with narrow granular backfill

Li,

Chen,

Chen

et al. 2023

Num Anal Meth Geomechanics

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Ascertaining failure mechanism is a prerequisite of the derivation for earth pressure against retaining structures. Retaining structures constructed adjacent to existing structures and excavation with narrow backfill have become common in practical engineering. The backfill width has a significant effect on the failure mechanism, requiring further study. In this study, a series of discrete element analyses are conducted to investigate the shear localization in soil mass behind retaining structures with narrow backfill in the active and passive limit states at the grain scale. Furthermore, the distribution characteristic of failure surfaces in soil mass is discussed from three aspects: the development of the failure surface, the state of soil mass behind retaining structures, and the shape of the failure surface. Based on the typical nonlinear failure mechanisms observed in particle rotation contours with various backfill widths and interface friction angles, the failure mechanisms behind retaining structures with narrow spacing are categorized into three types according to the backfill widths. According to the stress characteristics of interfaces under different failure mechanisms, the variational method and Mohr stress circle analysis are adapted to analytically obtain the failure surfaces behind the retaining structure with narrow backfill. Comparisons with results obtained by the discrete element simulation show a reasonable agreement. In addition, a series of parameter studies are conducted to investigate the effect of backfill widths and interface friction angles on the failure mechanism.

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