Seismic passive resistance by pseudo-dynamic method

Choudhury, Deepankar; Nimbalkar, Sanjay

doi:10.1680/geot.2005.55.9.699

Cited by 204 publications

(61 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The component of seismic passive earth pressure has been calculated using the pseudo-dynamic approach proposed by Choudhury and Nimbalkar (2005). But the theory given by Choudhury and Nimbalkar (2005) for dry backfill has been modified for the present analysis to consider the effect of submergence of the backfill and pore water pressure. The total seismic passive earth pressure is given by (derived as per Ebeling and Morrison (1992) and Kramer (1996)),…”

Section: Seismic Earth Pressurementioning

confidence: 99%

“…where r u = pore pressure ratio, defined as the ratio of excess pore pressure to the initial vertical stress, incorporation of which is a simplified way (as per Ebeling and Morrison, (1992)) of simulating the effect of the excess pore pressure generated due to cyclic shaking of the soil during an earthquake; K pe = the seismic passive earth pressure coefficient, obtained by using the similar methodology of Choudhury and Nimbalkar (2005),…”

Section: Seismic Earth Pressurementioning

confidence: 99%

“…The literature archives show that there have not been many studies in the past, in which the stability and the behavior of such waterfront retaining walls had been assessed under the mentioned combination of forces/pressures. Whatever is present in the literature is either by considering only one force/pressure or just a combination of a few of these forces/pressures at a time, except for the work reported by Choudhury and Ahmad (2007a) who considered all these forces/pressures, but in which the seismic earth pressure was calculated using the conventional pseudo-static approach, which can be regarded to be too conservative as it has got several drawbacks as has been reported by Steedman and Zeng (1990), Choudhury and Nimbalkar (2005, 2006, 2007, Choudhury and Ahmad (2008), Ahmad and Choudhury (2008), and Nimbalkar and Choudhury (2008). The effect of the hydrodynamic pressure along with the seismic active earth pressure was studied by Ebeling and Morrison (1992) and Ahmad (2007b, 2008).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Stability of Waterfront Retaining Wall Subjected to Pseudo-Dynamic Earthquake Forces and Tsunami

Ahmad

Choudhury

2008

J. Earthquake and Tsunami

View full text Add to dashboard Cite

The paper pertains to a study in which the waterfront retaining wall has been analyzed for its stability when it is exposed to the forces jointly coming from an earthquake and tsunami. Closed form solutions following the simple limit equilibrium principles have been proposed. For the calculation of the seismic passive earth pressure and the wall inertia force, pseudo-dynamic approach has been considered, while the hydrodynamic and the tsunami wave pressures have been calculated using different approximating solutions available in literature. The results presented in the sliding and overturning modes of failure of the wall show that the stability of the wall gets seriously challenged when it gets jointly exposed to the effects of the tsunami and earthquake. About 92% decrease is observed in the value of the factor of safety in sliding mode of failure of the wall as the ratio of tsunami wave height to the upstream still water height increases from 0 to 1.5. Also, the critical mode of failure of the wall has been found to be that of the overturning. Effect of different parameters involved in the analysis has also been studied and it has been observed that quite a few of them like k h , kv, φ, δ, ru have a significant effect on the stability of the wall. Comparison with a previously existing methodology using pseudo-static approach suggests that the present pseudo-dynamic approach is more realistic and comparatively less conservative and hence can be used as a handy simple economic method for the design of the waterfront retaining walls exposed to the combined effects of earthquake and tsunami.

show abstract

Section: Seismic Earth Pressurementioning

confidence: 99%

Section: Seismic Earth Pressurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Stability of Waterfront Retaining Wall Subjected to Pseudo-Dynamic Earthquake Forces and Tsunami

Ahmad

Choudhury

2008

J. Earthquake and Tsunami

View full text Add to dashboard Cite

show abstract

“…But the similar consideration of both the soil and the wall inertia effects for seismic design of a retaining wall under the passive condition of earth pressure is still scarce. Recently, based on the dynamic method proposed by Steedman and Zeng [14], Zeng and Steedman [15], Choudhury and Nimbalkar [16] for the active earth pressure condition, Choudhury and Nimbalkar [17] [18] had proposed the theory to compute the seismic passive earth pressure by dynamic method by considering both the shear and the primary waves propagating through the soil with a time variation. But the analysis did not consider the effect of the amplification and the wall inertia in the seismic design of the wall, hence leading to an incomplete analysis for design purpose of the wall.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Unsaturated Layer Effect on Seismic Analysis of Unbraced Sheet Pile Wall

Jahangir¹,

Soleymani²,

Sadeghi³

2017

OJMS

View full text Add to dashboard Cite

This paper is built upon the previous developments on lateral earth pressure by providing a series of analytical expressions that may be used to evaluate vertical profiles of the effective stress and the corresponding suction stress under steady-state flow conditions. Suction stress profile is modeled for one layer sand near the ground above the water level under hydrostatic conditions. By definition, the absolute magnitude of suction stress depends on both the magnitude of the effective stress parameter and matric suction itself. Thus, by developing the Rankine's relations in seismic state, the composing method of active and passive surfaces in sides of unbraced sheet pile is examinated and the effects of soil parameter on those surfaces are evaluated by a similar process. The relations described the quantitative evaluation of lateral earth pressure on sheet pile and the effects of unsaturated layer on bending moment and embedded depth of sheet pile in soil.

show abstract

“…(2008) and Ghanbari and Ahmadabadi (2010) have given the solution by considering the Horizontal Slices Method with linear kind of failure surface. The passive resistance from cohesionless (Ф) backfills has been analyzed by Choudhury and Nimbalkar (2005) considering the concept of phase difference due to finite shear wave propagation using pseudo-dynamic methods. analyses.…”

Section: Introductionmentioning

confidence: 99%