Pseudostatic approach for seismic analysis of pile group

Elahi, H.; Moradi, Majid; Poulos, Harry G.; Ghalandarzadeh, Abbas

doi:10.1016/j.compgeo.2009.07.001

Cited by 31 publications

(19 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Due to the influence of liquefaction on free-field soil response and soilepilee structure interaction, the magnitudes of inertial and kinematic loads change (Han et al, 2007). When the acceleration of ground surface or superstructure mass is large or lateral dynamic stiffness of pile group due to pile and/or soil stiffness is small, the inertial effects may become important (Elahi et al, 2010). Figs.…”

Section: Resultsmentioning

confidence: 99%

“…This pseudo-static method has been suggested early by Miura et al (1989), Miura and O'Rourke (1991), Liu and Dobry (1995), JRA (1996), AIJ (1998) and recently by Liyanapathirana and Poulos (2005) and Elahi et al (2010). This method for pile seismic analysis sometimes underestimates, and sometimes overestimates shears, moments and deflection of the piles.…”

Section: Introductionmentioning

confidence: 87%

See 1 more Smart Citation

Lateral response of pile foundations in liquefiable soils

Janalizadeh

Zahmatkesh

2015

Journal of Rock Mechanics and Geotechnical Engineering

View full text Add to dashboard Cite

a b s t r a c tLiquefaction has been a main cause of damage to civil engineering structures in seismically active areas. The effects of damage of liquefaction on deep foundations are very destructive. Seismic behavior of pile foundations is widely discussed by many researchers for safer and more economic design purposes. This paper presents a pseudo-static method for analysis of piles in liquefiable soil under seismic loads. A freefield site response analysis using three-dimensional (3D) numerical modeling was performed to determine kinematic loads from lateral ground displacements and inertial loads from vibration of the superstructure. The effects of various parameters, such as soil layering, kinematic and inertial forces, boundary condition of pile head and ground slope, on pile response were studied. By comparing the numerical results with the centrifuge test results, it can be concluded that the use of the p-y curves with various degradation factors in liquefiable sand gives reasonable results.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 87%

Lateral response of pile foundations in liquefiable soils

Janalizadeh

Zahmatkesh

2015

Journal of Rock Mechanics and Geotechnical Engineering

View full text Add to dashboard Cite

show abstract

“…A procedure was presented by Elahi et al (2010a) for pseudo-static analysis of a pile group in horizontal ground which takes into account soil yielding and group effects in a relatively simple manner. Their proposed method involves two main steps: 1.…”

Section: Pseudostatic Analysis Of Pile Group In Horizontal Ground Surmentioning

confidence: 99%

“…Following the pseudostatic approach, Tabesh and Poulos(2001) presented a method based on simplified boundary element models for seismic analysis of a single pile with linear soil behavior. Elahi et al (2010a) have extended the Tabesh and Poulos (2001) method to consider pile groups. The current paper studies the joint effects of seismic behavior of a pile or pile group within a soil slope through the application of experiences gained from the research conducted on each of the aforesaid subjects, using the pseudostatic analysis method developed by Elahi et al (2010a) and employing a relatively simple modification to it in order to include the effects of soil slope.…”

Section: Introductionmentioning

confidence: 99%

Seismic Analysis of Pile Group in Soil Slopes Using Pseudostatic Approach

Elahi¹,

Poulos²,

Moradi

et al. 2012

GeoCongress 2012

Self Cite

View full text Add to dashboard Cite

This paper evaluates a simple approximate pseudostatic method for estimating the maximum internal forces and horizontal displacements of a pile group located in a soil slope. The method is an extension of an existing similar method developed by the authors for the case of a horizontal ground surface. The method for horizontal ground involves two main steps: 1. First, the free-field soil movements caused by the earthquake are computed. 2. Second, the response of the pile group is analysed, based on the maximum freefield soil movements as static movements, as well as a static loading at the pile head, which depends on the computed spectral acceleration of the structure being supported. The methodology takes into account the effects of group interaction and soil yielding. Simple modifications are applied to take into account the effect of slope on the seismic deformations of the pile group, making use of the Newmark sliding block method. The applicability of the approach is verified by comparisons with both experimental shaking table tests, and with the results of a more rigorous analysis of a pile-supported wharf. It is demonstrated that the proposed method yields reasonable estimates of the pile maximum moment and horizontal displacement for many practical cases, despite its relative simplicity.

show abstract

“…This allows reducing the problem dimension, implying on less processing time. This advantage is explored in several works [1,7,12] and new developments are making the BEM even more attractive to future applications. One is simulating non-homogeneous domains using an alternative multi-domain BEM technique [13], another is using mapping functions to make boundary elements infinite [14].…”

Section: Introductionmentioning

confidence: 97%

Study of Soil-Structure Interaction Problems Using Mixed FEM-BEM Formulations

Ribeiro¹,

Paiva

2015

Transactions on Engineering Technologies

View full text Add to dashboard Cite

The objective of this paper is to present formulations developed for soilbuilding interaction analysis, including foundations. The soil is modeled with the boundary element method (BEM) as a layered solid which may be finite for the vertical direction, but is always infinite for radial directions. Infinite boundary elements are employed for the far field simulation, allowing computational cost reduction without compromising the result accuracy. Beams, columns and piles are modeled with the finite element method (FEM) using one dimensional elements. Slabs and rafts are also modeled with the FEM, but with two dimensional elements. The analysis is static and all materials are considered homogeneous, isotropic, elastic and with linear behavior.

show abstract

Pseudostatic approach for seismic analysis of pile group

Cited by 31 publications

References 29 publications

Lateral response of pile foundations in liquefiable soils

Lateral response of pile foundations in liquefiable soils

Seismic Analysis of Pile Group in Soil Slopes Using Pseudostatic Approach

Study of Soil-Structure Interaction Problems Using Mixed FEM-BEM Formulations

Contact Info

Product

Resources

About