Shallow and deep foundations

Hicks, Michael A.; Brinkgreve, R.B.J.; Rohe, Alexander

doi:10.1201/b17017-11

Cited by 4 publications

(3 citation statements)

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“…Despite offering an elegant modelling approach for simulating a nonlinear hysteretic response, tensorial series Mroz-Iwan models can become complex and implementation can be difficult. Chiang and Beck (1994), Einav and Collins (2008) and Grimstad et al (2014) have demonstrated that the use of multi-surface models based on a 'parallel Iwan' approach, as first proposed by Iwan (1966), offers a method that is simpler to develop and implement, while still providing a predictive capability similar to that of the series Mroz-Iwan approach. Iwan (1966) proposed a one-dimensional (1D) model in which a number of spring-slider elements, with different yield strengths and different elastic stiffnesses, are arranged in parallel.…”

Section: Cyclic Behaviourmentioning

confidence: 99%

Formulation and implementation of a practical multi-surface soil plasticity model

Whyte

Burd

Martin

et al. 2020

Computers and Geotechnics

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This paper presents a new constitutive model for clay, for undrained monotonic and cyclic loading, that has been developed specifically for geotechnical design applications. The model employs a parallel Iwan approach, consisting of multiple elastic-perfectly-plastic micro models. Degradation of stiffness and strength during cyclic loading is incorporated using an empirical cyclic overlay method. The theoretical framework and calibration processes for the model are presented. An implementation of the model in a commercial finite element program is then described; this implementation is demonstrated via 3D finite element analyses of example offshore monopile foundations subjected to monotonic and cyclic lateral loading.

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Section: Cyclic Behaviourmentioning

confidence: 99%

Formulation and implementation of a practical multi-surface soil plasticity model

Whyte

Burd

Martin

et al. 2020

Computers and Geotechnics

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“…The kinematic hardening rule defines the direction of dα i , that is, how does the centre of each yield surface i translate. In the macro-element model, the kinematic hardening rule employed in Grimstad et al [24], and displayed in Eq. 16 has been adopted for each yield surface.…”

Section: Hardening Lawmentioning

confidence: 99%

“…The model is a total stress model, which means that it cannot predict pore-pressure build up due to change in effective mean stresses. The model formulation is based on the formulation presented in Iwan [20], Montáns [23] and in Grimstad et al [24], and summarised in Section 2.2.2.…”

Section: Introductionmentioning

confidence: 99%

A macro-element model for multidirectional cyclic lateral loading of monopiles in clay

Page

Grimstad

Eiksund

et al. 2019

Computers and Geotechnics

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This paper investigates numerically the impact of multidirectional cyclic loads on the response of a monopile in clay supporting an offshore wind turbine (OWT). The results indicate that multidirectional loading modifies the foundation stiffness and hysteretic damping, which affects the OWT eigenfrequencies and damping. Based on these results, a macro-element model to represent the monopile response in the time-domain integrated load simulations employed in OWT design is proposed and verified against finite element analyses (FEA). The verification indicates the macro-element can simulate the monopile response with almost the same accuracy as FEA, but with a considerable reduction in computational effort.

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A macro-element for integrated time domain analyses representing bucket foundations for offshore wind turbines

et al. 2018

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Shallow and deep foundations

Cited by 4 publications

References 0 publications

Formulation and implementation of a practical multi-surface soil plasticity model

Formulation and implementation of a practical multi-surface soil plasticity model

A macro-element model for multidirectional cyclic lateral loading of monopiles in clay

A macro-element for integrated time domain analyses representing bucket foundations for offshore wind turbines

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