Generalized Seismic Active Thrust on a Retaining Wall with Submerged Backfill Using a Modified Pseudodynamic Method

Rajesh, B. Giridhar; Choudhury, Deepankar

doi:10.1061/(asce)gm.1943-5622.0000750

Cited by 51 publications

(7 citation statements)

References 33 publications

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“…In the so-called modified pseudo-dynamic excitation, the soil medium is simulated as a visco-elastic material by means of the well-defined Kelvin-Voigt model so as to account for the influence of damping ratio in the mobilized shear stress formulations. In this regard, the seismic horizontal acceleration coefficient acting on the centroid of each element is determined by the following modified pseudo-dynamic function to represent the shear waves propagating vertically through the soil (porous) medium [31][32][33][34][35][36][37][38][39][40][41][42][43]58 :…”

Section: Modified Pseudo-dynamic Modelingmentioning

confidence: 99%

“…The method was extensively employed by several researchers in subsequent studies. [33][34][35][36][37][38][39][40][41][42][43] A current limitation of the conventional pseudo-dynamic method is that it does not consider the effect of soil damping and the traction-free surface condition. Furthermore, in all the previous modified pseudo-dynamic analyses, the damping ratio of the soil deposit has been deemed to be constant with depth, which is discernibly incompatible with the fundamental compression implications and laboratory/field test results.…”

Section: Introductionmentioning

confidence: 99%

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Lower bound analysis of modified pseudo‐dynamic lateral earth pressures for retaining wall‐backfill system with depth‐varying damping using FEM‐Second order cone programming

Fathipour

Payan

Chenari

et al. 2021

Num Anal Meth Geomechanics

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Realistic constitutive ground models are critical in the evaluation of soilstructure interaction problems and the assessment of key design parameters in the seismic analysis of infrastructure systems. In the present study, the modified pseudo-dynamic lateral earth pressures acting on retaining structure with granular backfill of depth-varying damping ratio are evaluated adopting the lower bound limit analysis in conjunction with the finite element (FE) discretization method using second-order cone programming (SOCP). The earthquake loading is simulated by the propagation of shear and primary waves through nonconstant inertia forces in the horizontal and vertical directions, respectively. The influence of varying damping ratio alongside the retaining wall height on the seismic active and passive lateral earth pressures is effectively taken into account by adopting well-established formulas published in the literature. It is shown that failing to consider the damping variation with depth while performing the modified pseudo-dynamic analysis could lead to precarious, unrealistic estimates of design parameters. K E Y W O R D Sfinite element limit analysis (FELA), lateral earth pressure, lower bound, material damping, modified pseudo-dynamic method, second-order cone programming (SOCP)

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Section: Modified Pseudo-dynamic Modelingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Lower bound analysis of modified pseudo‐dynamic lateral earth pressures for retaining wall‐backfill system with depth‐varying damping using FEM‐Second order cone programming

Fathipour

Payan

Chenari

et al. 2021

Num Anal Meth Geomechanics

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“…For nonlinear twin-shear rock masses, the corresponding 3D closed-form expressions of the foregoing ψ-functions are obtained as follows [28]:…”

Section: Advances In Civil Engineeringmentioning

confidence: 99%

The Analysis of Anchoring Mechanism of Rock Slope in Two Layers Based on the Nonlinear Twin‐Shear Strength Criterion

Wang

et al. 2021

Advances in Civil Engineering

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The nonlinear strength criterion is introduced into the paper firstly, and then the geometric anchoring characteristic model of rock slope separated from two layers according to rock type with the fracture surface of log-spiral curve considering nonlinear twin-shear criterion subjected to seismic loads is established. Finally, some correlated influential parameters are analyzed, and the conclusions are drawn, showing that the intermediate principal stress has great influence on the total anchoring force of bolt P, so when different criteria are selected, the influence of intermediate principal stress should not be omitted. The effects of thickness ratio h1/h2 on total anchoring force increase gradually with the increase of inclination angle ϕ . The total anchoring force P decreases gradually with the increase of inclination angle ϕ and surcharge load q. The total anchoring force increases gradually with the increase of horizontal seismic acceleration coefficients kh and geometric coefficients mi and GSI.

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“…Choudhury and Nimbalkar [5] considered primary wave velocity (v p ) and vertical seismic acceleration (k v g) based on the pseudodynamic method developed by Steedman and Zeng [3] to study the seismic earth pressures on retaining walls. Many other researchers have conducted detailed studies using the pseudodynamic method, assuming the failure surface of the backfill to be planar [6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

A Pseudodynamic Approach of Seismic Active Pressure on Retaining Walls Based on a Curved Rupture Surface

Yan

Deng

et al. 2020

Mathematical Problems in Engineering

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Reasonable determination of the magnitude and distribution of dynamic earth pressure is one of the major challenges in the seismic design of retaining walls. Based on the principles of pseudodynamic method, the present study assumed that the critical rupture surface of backfill soil was a composite curved surface which was in combination with a logarithmic spiral and straight line. The equations for the calculation of seismic total active thrusts on retaining walls were derived using limit equilibrium theory, and earth pressure distribution was obtained by differentiating total active thrusts. The effects of initial phase, amplification factor, and soil friction angle on the distribution of seismic active earth pressure have also been discussed. Compared to pseudostatic and pseudodynamic methods for the determination of planar failure surface forms, the proposed method receives a bit lower value of seismic active earth pressures.

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Generalized Seismic Active Thrust on a Retaining Wall with Submerged Backfill Using a Modified Pseudodynamic Method

Cited by 51 publications

References 33 publications

Lower bound analysis of modified pseudo‐dynamic lateral earth pressures for retaining wall‐backfill system with depth‐varying damping using FEM‐Second order cone programming

Lower bound analysis of modified pseudo‐dynamic lateral earth pressures for retaining wall‐backfill system with depth‐varying damping using FEM‐Second order cone programming

The Analysis of Anchoring Mechanism of Rock Slope in Two Layers Based on the Nonlinear Twin‐Shear Strength Criterion

A Pseudodynamic Approach of Seismic Active Pressure on Retaining Walls Based on a Curved Rupture Surface

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