Evaluation of rocking and coupling rotational linear stiffness coefficients of adjacent foundations

Hesham Aldaikh; Nicholas A. Alexander; Erdin Ibraim; Jonathan A. Knappett

doi:10.1061/(ASCE)GM.1943-5622.0001041

Evaluation of rocking and coupling rotational linear stiffness coefficients of adjacent foundations

Hesham Aldaikh (Lead / Corresponding author), Nicholas A. Alexander, Erdin Ibraim, Jonathan A. Knappett

Research output: Contribution to journal › Article › peer-review

16 Citations (Scopus)

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Abstract

This paper presents closed-form expressions for rocking spring stiffnesses and coupling interaction rotational spring stiffnesses for a set of closely spaced footings. Substructuring is used to derive analytically the exact reduced order spring models of the system. The stiffness coefficients of this reduced order model are determined by using (1) an extended, novel application of Boussinesq's surface displacement of a point-loaded half-space and (2) an empirically derived formulation that makes use of both finite-element and experimental results. Further validation suggests that, within the scope of epistemic uncertainty present in the physical world, the interaction formulas between two footings are sufficient for more general multifooting interaction cases.

Original language	English
Article number	04017131
Pages (from-to)	04017131-1-04017131-12
Number of pages	12
Journal	International Journal of Geomechanics
Volume	18
Issue number	1
Early online date	1 Nov 2017
DOIs	https://doi.org/10.1061/(ASCE)GM.1943-5622.0001041
Publication status	Published - 1 Jan 2018

Keywords

Coupling rotational stiffness coefficient
Discrete lumped parameter model
Rocking stiffness coefficient
Structure-soil-structure interaction

ASJC Scopus subject areas

Soil Science

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10.1061/(ASCE)GM.1943-5622.0001041

Author Accepted ManuscriptAccepted author manuscript, 10.5 MB

16 Citations
1 Paper

Centrifuge and Numerical Investigation of Fault Rupture Interaction with a Three-legged Jack-up Rig Founded on Spudcan Foundations
Oakes, K., Brown, M., Knappett, J. & Anastasopoulos, I., 5 Jul 2022.
Research output: Contribution to conference › Paper › peer-review

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title = "Evaluation of rocking and coupling rotational linear stiffness coefficients of adjacent foundations",

abstract = "This paper presents closed-form expressions for rocking spring stiffnesses and coupling interaction rotational spring stiffnesses for a set of closely spaced footings. Substructuring is used to derive analytically the exact reduced order spring models of the system. The stiffness coefficients of this reduced order model are determined by using (1) an extended, novel application of Boussinesq's surface displacement of a point-loaded half-space and (2) an empirically derived formulation that makes use of both finite-element and experimental results. Further validation suggests that, within the scope of epistemic uncertainty present in the physical world, the interaction formulas between two footings are sufficient for more general multifooting interaction cases.",

keywords = "Coupling rotational stiffness coefficient, Discrete lumped parameter model, Rocking stiffness coefficient, Structure-soil-structure interaction",

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Evaluation of rocking and coupling rotational linear stiffness coefficients of adjacent foundations. / Aldaikh, Hesham (Lead / Corresponding author); Alexander, Nicholas A.; Ibraim, Erdin et al.
In: International Journal of Geomechanics, Vol. 18, No. 1, 04017131, 01.01.2018, p. 04017131-1-04017131-12.

Research output: Contribution to journal › Article › peer-review

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T1 - Evaluation of rocking and coupling rotational linear stiffness coefficients of adjacent foundations

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AU - Alexander, Nicholas A.

AU - Ibraim, Erdin

AU - Knappett, Jonathan A.

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PY - 2018/1/1

Y1 - 2018/1/1

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KW - Discrete lumped parameter model

KW - Rocking stiffness coefficient

KW - Structure-soil-structure interaction

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Evaluation of rocking and coupling rotational linear stiffness coefficients of adjacent foundations

Abstract

Keywords

ASJC Scopus subject areas

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Research output

Centrifuge and Numerical Investigation of Fault Rupture Interaction with a Three-legged Jack-up Rig Founded on Spudcan Foundations

Cite this