A Macro-Element design method for shallow foundations accounting for SSI effects: characterizing response as failure envelopes

Amin Barari, V. Ghaseminejad, Lars Bo Ibsen

Publikation: Bidrag til bog/antologi/rapport/konference proceedingKonferenceartikel i proceedingForskningpeer review

Resumé

Skirted foundations are increasingly used in the design of offshore wind turbine structures and facilities to withstand combined vertical (V), horizontal (H) and moment (M) loading conditions. Skirted foundations have been used widely for offshore wind energy converters based on their ease of installation, cost effectiveness the avoidance of noise emission compared with deep footings such as monopiles and piled foundations.

Classical design methods and determining separate modification factors could not accurately consider interaction of the effective parameters in the bearing capacity expressions. Nowadays, the conventional bearing capacity approaches of a foundation under combined vertical, horizontal and moment loads are being replaced and most usually expressed by the planes of H:V, H:M, M:V interaction envelopes and sometimes in 3D space through a failure surface. In the interaction diagrams or failure envelopes, the effects of foundation geometry, horizontal load eccentricity and various soil conditions can be interacted.

The capacity of shallow foundations on sand under combined loading will be expressed here in nondimensional form through the use of appropriate failure coefficients that will be affected by the foundation characteristics and stress-dependent stiffness.

Having identical failure envelopes upon scaling with the pure bearing capacities (i.e., which are given by intersections with the axes), the assumption appropriateness will be examined here by means of an alternative Macro-Element model in presence of the soil strength inhomogeneity.
OriginalsprogEngelsk
TitelThe 2nd International Conference on Natural Hazards & Infrastructure 23-26 June, 2019, Chania, Greece.
RedaktørerGeorge Gazetas, Ioannis Anastasopoulos, Rallis Kourkoulis, Fani Gelagoti
Udgivelses stedAthens
ForlagNational Technical University of Athens
Publikationsdatojun. 2019
StatusUdgivet - jun. 2019
NavnInternational Conference on Natural Hazards and Infrastructure
ISSN2623-4513

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Macros
Bearing capacity
Offshore wind turbines
Soils
Cost effectiveness
Wind power
Sand
Stiffness
Geometry

Citer dette

Barari, A., Ghaseminejad, V., & Ibsen, L. B. (2019). A Macro-Element design method for shallow foundations accounting for SSI effects: characterizing response as failure envelopes. I G. Gazetas, I. Anastasopoulos, R. Kourkoulis, & F. Gelagoti (red.), The 2nd International Conference on Natural Hazards & Infrastructure 23-26 June, 2019, Chania, Greece. Athens: National Technical University of Athens. International Conference on Natural Hazards and Infrastructure
Barari, Amin ; Ghaseminejad, V. ; Ibsen, Lars Bo. / A Macro-Element design method for shallow foundations accounting for SSI effects : characterizing response as failure envelopes. The 2nd International Conference on Natural Hazards & Infrastructure 23-26 June, 2019, Chania, Greece.. red. / George Gazetas ; Ioannis Anastasopoulos ; Rallis Kourkoulis ; Fani Gelagoti. Athens : National Technical University of Athens, 2019. (International Conference on Natural Hazards and Infrastructure).
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title = "A Macro-Element design method for shallow foundations accounting for SSI effects: characterizing response as failure envelopes",
abstract = "Skirted foundations are increasingly used in the design of offshore wind turbine structures and facilities to withstand combined vertical (V), horizontal (H) and moment (M) loading conditions. Skirted foundations have been used widely for offshore wind energy converters based on their ease of installation, cost effectiveness the avoidance of noise emission compared with deep footings such as monopiles and piled foundations.Classical design methods and determining separate modification factors could not accurately consider interaction of the effective parameters in the bearing capacity expressions. Nowadays, the conventional bearing capacity approaches of a foundation under combined vertical, horizontal and moment loads are being replaced and most usually expressed by the planes of H:V, H:M, M:V interaction envelopes and sometimes in 3D space through a failure surface. In the interaction diagrams or failure envelopes, the effects of foundation geometry, horizontal load eccentricity and various soil conditions can be interacted.The capacity of shallow foundations on sand under combined loading will be expressed here in nondimensional form through the use of appropriate failure coefficients that will be affected by the foundation characteristics and stress-dependent stiffness.Having identical failure envelopes upon scaling with the pure bearing capacities (i.e., which are given by intersections with the axes), the assumption appropriateness will be examined here by means of an alternative Macro-Element model in presence of the soil strength inhomogeneity.",
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publisher = "National Technical University of Athens",
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Barari, A, Ghaseminejad, V & Ibsen, LB 2019, A Macro-Element design method for shallow foundations accounting for SSI effects: characterizing response as failure envelopes. i G Gazetas, I Anastasopoulos, R Kourkoulis & F Gelagoti (red), The 2nd International Conference on Natural Hazards & Infrastructure 23-26 June, 2019, Chania, Greece.. National Technical University of Athens, Athens, International Conference on Natural Hazards and Infrastructure.

A Macro-Element design method for shallow foundations accounting for SSI effects : characterizing response as failure envelopes. / Barari, Amin; Ghaseminejad, V.; Ibsen, Lars Bo.

The 2nd International Conference on Natural Hazards & Infrastructure 23-26 June, 2019, Chania, Greece.. red. / George Gazetas; Ioannis Anastasopoulos; Rallis Kourkoulis; Fani Gelagoti. Athens : National Technical University of Athens, 2019. (International Conference on Natural Hazards and Infrastructure).

Publikation: Bidrag til bog/antologi/rapport/konference proceedingKonferenceartikel i proceedingForskningpeer review

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T1 - A Macro-Element design method for shallow foundations accounting for SSI effects

T2 - characterizing response as failure envelopes

AU - Barari, Amin

AU - Ghaseminejad, V.

AU - Ibsen, Lars Bo

PY - 2019/6

Y1 - 2019/6

N2 - Skirted foundations are increasingly used in the design of offshore wind turbine structures and facilities to withstand combined vertical (V), horizontal (H) and moment (M) loading conditions. Skirted foundations have been used widely for offshore wind energy converters based on their ease of installation, cost effectiveness the avoidance of noise emission compared with deep footings such as monopiles and piled foundations.Classical design methods and determining separate modification factors could not accurately consider interaction of the effective parameters in the bearing capacity expressions. Nowadays, the conventional bearing capacity approaches of a foundation under combined vertical, horizontal and moment loads are being replaced and most usually expressed by the planes of H:V, H:M, M:V interaction envelopes and sometimes in 3D space through a failure surface. In the interaction diagrams or failure envelopes, the effects of foundation geometry, horizontal load eccentricity and various soil conditions can be interacted.The capacity of shallow foundations on sand under combined loading will be expressed here in nondimensional form through the use of appropriate failure coefficients that will be affected by the foundation characteristics and stress-dependent stiffness.Having identical failure envelopes upon scaling with the pure bearing capacities (i.e., which are given by intersections with the axes), the assumption appropriateness will be examined here by means of an alternative Macro-Element model in presence of the soil strength inhomogeneity.

AB - Skirted foundations are increasingly used in the design of offshore wind turbine structures and facilities to withstand combined vertical (V), horizontal (H) and moment (M) loading conditions. Skirted foundations have been used widely for offshore wind energy converters based on their ease of installation, cost effectiveness the avoidance of noise emission compared with deep footings such as monopiles and piled foundations.Classical design methods and determining separate modification factors could not accurately consider interaction of the effective parameters in the bearing capacity expressions. Nowadays, the conventional bearing capacity approaches of a foundation under combined vertical, horizontal and moment loads are being replaced and most usually expressed by the planes of H:V, H:M, M:V interaction envelopes and sometimes in 3D space through a failure surface. In the interaction diagrams or failure envelopes, the effects of foundation geometry, horizontal load eccentricity and various soil conditions can be interacted.The capacity of shallow foundations on sand under combined loading will be expressed here in nondimensional form through the use of appropriate failure coefficients that will be affected by the foundation characteristics and stress-dependent stiffness.Having identical failure envelopes upon scaling with the pure bearing capacities (i.e., which are given by intersections with the axes), the assumption appropriateness will be examined here by means of an alternative Macro-Element model in presence of the soil strength inhomogeneity.

M3 - Article in proceeding

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BT - The 2nd International Conference on Natural Hazards & Infrastructure 23-26 June, 2019, Chania, Greece.

A2 - Gazetas, George

A2 - Anastasopoulos, Ioannis

A2 - Kourkoulis, Rallis

A2 - Gelagoti, Fani

PB - National Technical University of Athens

CY - Athens

ER -

Barari A, Ghaseminejad V, Ibsen LB. A Macro-Element design method for shallow foundations accounting for SSI effects: characterizing response as failure envelopes. I Gazetas G, Anastasopoulos I, Kourkoulis R, Gelagoti F, red., The 2nd International Conference on Natural Hazards & Infrastructure 23-26 June, 2019, Chania, Greece.. Athens: National Technical University of Athens. 2019. (International Conference on Natural Hazards and Infrastructure).