Seismic passive earth resistance in submerged soils using modified pseudo-dynamic method with curved rupture surface

Rajesh, B. Giridhar; Choudhury, Deepankar

doi:10.1080/1064119x.2016.1260077

Cited by 41 publications

(8 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The horizontal and vertical components' harmonic accelerations with amplitudes k h g, k v g and time period T are considered at the base of the wall. The seismic horizontal acceleration according to the modified pseudodynamic method at time t and depth z from the free surface which is a function of V Ss , ξ s , h and T can be written as follows (Rajesh and Choudhury 2017b):…”

Section: Methods Of Analysismentioning

confidence: 99%

See 1 more Smart Citation

Computation of sliding displacements of seawalls under earthquake conditions

Rajesh

Choudhury

2018

Nat Hazards

Self Cite

View full text Add to dashboard Cite

To understand the serviceability aspects of seawalls, it is essential to study the permanent displacements of seawalls that occur during the earthquakes. Studies in the existing literature have concentrated on displacements of retaining walls with dry backfills; to the authors' observation there is no specific analytical investigation devoted to the earthquake-induced displacements of retaining walls with submerged backfills. This paper focuses on sliding displacements of gravity type seawall retaining a submerged backfill under active earth pressure condition during the earthquakes. The threshold seismic acceleration coefficients required for initiation of sliding and the amount of sliding displacement due to seismic loading are calculated by adopting Newmark's sliding block method. One of the prime features of the study is the estimation of seismic inertia forces in the submerged soil and wall applying the modified pseudo-dynamic method. The comparison of the results obtained using the proposed analytical formulation with the existing literature found to be in good agreement. A comprehensive parametric study has been conducted to understand the effects of different parameters such as seismic horizontal and vertical acceleration coefficients, soil and wall friction angles, width of the wall, wall inclination and excess pore water pressure ratio.

show abstract

Section: Methods Of Analysismentioning

confidence: 99%

“…Similarly, the seismic vertical acceleration according to modified pseudo-dynamic approach at time t and depth z from the free surface which is a function of V Ps , ξ s , h and T can be written as follows (Rajesh and Choudhury 2017b):…”

Section: Methods Of Analysismentioning

confidence: 99%

Computation of sliding displacements of seawalls under earthquake conditions

Rajesh

Choudhury

2018

Nat Hazards

Self Cite

View full text Add to dashboard Cite

show abstract

“…• For computing Q v (z,t), unit weight of soil (γ) is taken as γ sub for both free and restrained water conditions. 33 For computation of total lateral pressure in restrained water conditions, summation of hydrostatic pressure with seismic passive earth pressure is done as water is at rest with respect to surrounding soil. However, for free water condition, hydrodynamic pressure, suggested by Westergaard, 48 is also taken into consideration along with hydrostatic pressure and seismic passive earth pressure to obtain total lateral pressure.…”

Section: Computation For Submerged Soil Conditionsmentioning

confidence: 99%

“…γ sat and γ are saturated unit weight and unit weight for dry soil, respectively 47 . Further hydrodynamic pressure is added for free water condition since effect of pore water is not considered while computing seismic inertial force on soil mass. For computing Q v ( z,t ), unit weight of soil ( γ ) is taken as γ sub for both free and restrained water conditions 33 …”

Section: Mathematical Formulation Of the Problemmentioning

confidence: 99%

Seismic passive earth pressure resistance for caisson in layered soil using modified pseudo‐dynamic approach

Kumar

Chatterjee

2023

Num Anal Meth Geomechanics

View full text Add to dashboard Cite

The determination of seismic passive earth pressure resistance is of utmost importance during the analysis of geotechnical structures. In the present study, seismic passive earth pressure coefficient for caisson embedded in n‐layered soil is computed using modified pseudo‐dynamic method. Limit equilibrium method of analysis considering poly‐planar failure wedge has been adopted in the study and parametric variation of geometry of failure wedge has also been studied. The current study proposes formulation for variation of horizontal and vertical seismic acceleration profile with depth through various layers and studies the effect of number of layers, relative depths of various layers and relative soil friction angle in those layers, soil‐wall friction angle, horizontal and vertical seismic acceleration coefficients and normalized width of caisson. The study has been extended for submerged soil and the effect of excess pore pressure has been investigated. The results of the present study have been compared with previous theoretical studies and found to be in good agreement. It is observed that the extent of failure wedge formed in front of caisson increases with increasing soil friction angle, soil‐wall friction angle, horizontal seismic acceleration coefficient and width of caisson.

show abstract

“…The use of full passive pressure without regard for the displacement is not conservative as it decreases the flexural effects of dead and live load in the bridge girders. Some researchers [53][54][55] proposed modified coefficients based on Rankine's law. The passive earth pressure coefficients were thought to be reduced by multiplying Rankine's passive coefficients.…”

Section: Rankine Theorymentioning

confidence: 99%

A Review: Study of Integral Abutment Bridge with Consideration of Soil-Structure Interaction

Naji¹,

Firoozi

Firoozi³

2020

Lat. Am. j. solids struct.

View full text Add to dashboard Cite

Bridges are one of the most critical parts of transportation networks that may suffer damages against earthquakes. Also, seismic responses of most bridges are significantly influenced by soil-structure interaction effects. Taking out expansion joints in the bridges may cause many difficulties in design and analysis due to the complexity of soil-structure interaction and nonlinear behavior. The secondary loads on an IAB include seismic load, temperature variation, creep, shrinkage, backfill pressure on back wall and abutment, all of which cause superstructure length and stress variations in girder changes. The purpose of this study is to recognize the most effective parameters of analysis IABs. Findings show that the backfill material behind the IABs has a significant effect on the performance of IABs. Using a compressible material behind the abutments would enhance the in-service performance of IABs. Finally, behaviour of abutment may be greatly affected by thermal load and soil pressure. Thermal expansion coefficient significantly influences girder axial force, girder bending moment, and pile head/abutment displacement.

show abstract

Seismic passive earth resistance in submerged soils using modified pseudo-dynamic method with curved rupture surface

Cited by 41 publications

References 29 publications

Computation of sliding displacements of seawalls under earthquake conditions

Computation of sliding displacements of seawalls under earthquake conditions

Seismic passive earth pressure resistance for caisson in layered soil using modified pseudo‐dynamic approach

A Review: Study of Integral Abutment Bridge with Consideration of Soil-Structure Interaction

Contact Info

Product

Resources

About