Centrifuge modelling of seismic soil structure interaction effects

Ghosh, Barnali; Madabhushi, Spg

doi:10.1016/j.nucengdes.2006.09.027

Cited by 41 publications

(24 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The shear modulus reduction is reported to vary dramatically due to softening and should be representative of the site conditions (Ghosh and Madabhushi 2007). In a typical equivalent linear analysis, initial estimates of G and ξ are made, usually based on a linear elastic approximation, and then iterative linear analyses are performed, recalculating in each iteration the soil properties based on the estimated level of shear strain response.…”

Section: Theoretical Approximationmentioning

confidence: 99%

Equivalent linear substructure approximation of soil–foundation–structure interaction: model presentation and validation

Pitilakis

Clouteau

2009

Bull Earthquake Eng

View full text Add to dashboard Cite

An equivalent linear substructure approximation of the soil-foundation-structure interaction is proposed in this paper. Based on the inherent linearity of the approach, the solution of the structural and the soil domain is obtained simultaneously, incorporating the effects of the primary and secondary soil nonlinearities. The proposed approximation is established theoretically and then validated against centrifuge benchmark soil-foundation-structure interaction tests. The equivalent linear substructure approximation is proved to simulate efficiently the effects of the nonlinear soil behavior on the soil-foundation-structure system under a strong earthquake ground motion.

show abstract

Section: Theoretical Approximationmentioning

confidence: 99%

Equivalent linear substructure approximation of soil–foundation–structure interaction: model presentation and validation

Pitilakis

Clouteau

2009

Bull Earthquake Eng

View full text Add to dashboard Cite

show abstract

“…The effect of soil liquefaction on gravity structures was studied by Lee and Focht [37], and Walker and Blair [61]. Dynamic soil-structure interaction under seismic loading was investigated by Ghosh and Madabhushi [28], Srbulov [55], and Dashti et al [16]. The pile supported structures tend to fail in the form of overturning or tilting as the surrounding soil loses its lateral support during soil liquefaction.…”

Section: Introductionmentioning

confidence: 99%

Centrifuge modeling of offshore wind foundations under earthquake loading

Zeng

et al. 2015

Soil Dynamics and Earthquake Engineering

View full text Add to dashboard Cite

“…In the cases of rigid and flexible structures, the amplification factors near the surface were magnified 15% and 7%, respectively, compared with that of free-field surface. There are numerous documented case histories where the input motion to the structure is amplified compared with free-field surface [19]. The input motion to the foundation is affected by stresses in the soil induced by the propagating seismic wave as well as those resulting from the oscillation of the structure.…”

Section: Dry Granular Soil Responsementioning

confidence: 99%

Discrete element method simulations of the seismic response of shallow foundations including soil‐foundation‐structure interaction

Shamy

Zamani

2011

Num Anal Meth Geomechanics

View full text Add to dashboard Cite

SUMMARYA novel three-dimensional particle-based technique utilizing the discrete element method is proposed to analyze the seismic response of soil-foundation-structure systems. The proposed approach is employed to investigate the response of a single-degree-of-freedom structure on a square spread footing founded on a dry granular deposit. The soil is idealized as a collection of spherical particles using discrete element method. The spread footing is modeled as a rigid block composed of clumped particles, and its motion is described by the resultant forces and moments acting upon it. The structure is modeled as a column made of particles that are either clumped to idealize a rigid structure or bonded to simulate a flexible structure of prescribed stiffness. Analysis is done in a fully coupled scheme in time domain while taking into account the effects of soil nonlinear behavior, the possible separation between foundation base and soil caused by rocking, the possible sliding of the footing, and the dynamic soil-foundation interaction as well as the dynamic characteristics of the superstructure. High fidelity computational simulations comprising about half a million particles were conducted to examine the ability of the proposed technique to model the response of soil-foundation-structure systems. The computational approach is able to capture essential dynamic response patterns. The cyclic moment-rotation relationships at the base center point of the footing showed degradation of rotational stiffness by increasing the level of strain. Permanent deformations under the foundation continued to accumulate with the increase in number of loading cycles.

show abstract

Centrifuge modelling of seismic soil structure interaction effects

Cited by 41 publications

References 7 publications

Equivalent linear substructure approximation of soil–foundation–structure interaction: model presentation and validation

Equivalent linear substructure approximation of soil–foundation–structure interaction: model presentation and validation

Centrifuge modeling of offshore wind foundations under earthquake loading

Discrete element method simulations of the seismic response of shallow foundations including soil‐foundation‐structure interaction

Contact Info

Product

Resources

About