Reference : An enhanced interface model for friction fatigue problems of axially loaded piles
Scientific congresses, symposiums and conference proceedings : Paper published in a book
Engineering, computing & technology : Civil engineering
Computational Sciences
http://hdl.handle.net/10993/39627
An enhanced interface model for friction fatigue problems of axially loaded piles
English
Kullolli, Borana mailto [Bundesanstalt für Materialforschung und -prüfung Berlin, GERMANY]
Baeßler, Matthias [Bundesanstalt für Materialforschung und -prüfung Berlin, GERMANY]
Cuéllar, Pablo [Bundesanstalt für Materialforschung und -prüfung Berlin, GERMANY]
Rica, Shilton mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit >]
Rackwitz, Frank [Faculty of Civil Engineering, Technische Universität Berlin Berlin, GERMANY]
9-Jun-2019
Proceedings of the ASME 2019 38th, International Conference on Ocean, Offshore and Arctic Engineering, Glasgow 9-14 June 2019
Yes
International
Proceedings of the ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering OMAE2019
9-06-2019 to 14-06-2019
The Department of Naval Architecture, Ocean and Marine Engineering, University of Strathclyde; and The American Society of Mechanical Engineers (ASME)
Glasgow
Scitlan, Great Britain
[en] soil-structure interaction ; cyclic axially loaded pile ; friction fatigue ; interface model
[en] The shaft bearing capacity often plays a dominant role for the overall structural behaviour of axially loaded piles in offshore deep foundations. Under cyclic loading, a narrow zone of soil at the pile-soil interface is subject to cyclic shearing solicitations. Thereby, the soil may densify and lead to a decrease of confining stress around the pile due to micro-phenomena such as particle crushing, migration and rearrangement. This reduction of radial stress has a direct impact on the shaft capacity, potentially leading in extreme cases to pile failure.
An adequate interface model is needed in order to model this behaviour numerically. Different authors have proposed models that take typical interface phenomena in account such as densification, grain breakage, normal pressure effect and roughness.
However, as the models become more complex, a great number of material parameters need to be defined and calibrated. This paper proposes the adoption and transformation of an existing soil bulk model (Pastor- Zienkiewicz) into an interface model. To calibrate the new interface model, the results of an experimental campaign with the ring shear device under cyclic loading conditions are here presented. The constitutive model shows a good capability to reproduce typical features of sand behaviour such as cyclic compaction and dilatancy, which in saturated partially-drained conditions may lead to liquefaction and cyclic mobility phenomena.
Researchers ; Professionals ; Students ; Others
http://hdl.handle.net/10993/39627

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