Seismic stability of retaining wall–soil sliding interaction using modified pseudo-dynamic method

The article provides a brief overview of methods for assessing the seismic stability of systems using elastomeric supports under seismic impacts of the "Project earthquake" level. As part of the study, a set of dynamic and static calculations was performed, and two methods for calculating earthquake-resistant systems were considered: the linear-spectral method (LSM) and the direct dynamic method (PDM). The purpose of the research is to assess the possibility of using LST for seismic impacts of the PZ level on systems with elastomeric supports. It was found that the difference in the results of calculations for the two methods does not exceed 12 %. Thus, the SHEET can be used as the main tool for calculating seismically isolated systems under the seismic impact of the earth's surface area.

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Seismic Stability of a Broken-Back Retaining Wall Using Adaptive Collapse Mechanism

International Journal of Geomechanics ◽

10.1061/(asce)gm.1943-5622.0001786 ◽

2020 ◽

Vol 20 (9) ◽

pp. 04020154

Author(s):

G. Santhoshkumar ◽

Priyanka Ghosh

Keyword(s):

Retaining Wall ◽

Seismic Stability ◽

Collapse Mechanism

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Seismic internal stability assessment of geosynthetic reinforced earth retaining wall in cohesive soil using limit analysis

MATEC Web of Conferences ◽

10.1051/matecconf/201928102008 ◽

2019 ◽

Vol 281 ◽

pp. 02008

Author(s):

Hicham Alhajj Chehade ◽

Daniel Dias ◽

Marwan Sadek ◽

Fadi Hage Chehade ◽

Orianne Jenck

Keyword(s):

Limit Analysis ◽

Limit Equilibrium ◽

Retaining Wall ◽

Cohesive Soil ◽

Retaining Walls ◽

Reinforced Soil ◽

Seismic Stability ◽

Collapse Mechanism ◽

Kinematic Theorem ◽

Soil Retaining Walls

Assessment of internal seismic stability of geosynthetic reinforced cohesive soil retaining walls with likelihood for developing cracks in the failure mechanism is typically done with the limit equilibrium method. However, in this paper, the kinematic theorem of limit analysis combined with the discretization method are used to implement the crack formation in the collapse mechanism in the internal seismic assessment of geosynthetic reinforced soil retaining walls within the framework of the pseudo-static approach. The presence of the crack leads to an increase of the required reinforcement strength that prevent the failure of the structure.

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Analysis of Passive Earth Pressure and Displacements of Retaining Walls Using Pseudo-Dynamic Approach

International Journal of Geotechnical Earthquake Engineering ◽

10.4018/jgee.2010090806 ◽

2010 ◽

Vol 1 (1) ◽

pp. 88-109

Author(s):

B. Munwar Basha ◽

G. L. Sivakumar

Keyword(s):

Dynamic Method ◽

Retaining Wall ◽

Earth Pressure ◽

Passive Earth Pressure ◽

Planar Mechanisms ◽

Composite Failure ◽

Earth Pressures ◽

Planar Failure ◽

Seismic Accelerations ◽

The Comparative Study

Using additional dynamic parameters in the pseudo-static method like shear wave and primary wave velocities of soil, phase change in the shear and primary waves, and soil amplification for seismic accelerations, one can benefit from another useful tool called pseudo-dynamic method to solve the problem of earth pressures. In this study, the pseudo-dynamic method is used to compute the seismic passive earth pressures on a rigid gravity retaining wall by considering both the planar failure and composite failure (log-spiral and planar) mechanisms. To validate the present formulation, passive earth pressure computed by the present method are compared with those given by other authors. Seismic passive earth pressure coefficients are provided in tabular form for different parameters. The sliding and rotational displacements are also computed and results of the comparative study showed that the assumption of planar failure mechanism for rough soil-wall interfaces significantly overestimates passive earth pressure and underestimate the sliding and rotational displacements.

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