A Macro-Element Approach for Non-linear Response of Offshore Skirted Footings

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Abstract

In recent times, shallow foundations have become more diverse, and now include concrete or steel bucket foundations used as anchors for floating platforms or as foundation for offshore wind turbines. They are always subjected to significant cyclic lateral loads due to wind and wave action. A work-hardening plasticity model for the moment and horizontal force resultants associated with the displacements of the offshore suction caissons is herein developed.

In addition, in order to better understand the performance of offshore bucket foundations under cyclic lateral loads series of cyclic lateral load tests were carried out on small scale models in a special rig developed for the cyclic tests at Aalborg University. The influence of cyclic lateral loads on the bucket lateral secant stiffness is investigated and a function is utilized to investigate it due to permanent displacements. The bucket stiffness increased with number of cycles irrespective of the load characteristics which contradicts the traditional solutions to tackle this complex situation.
Original languageEnglish
Title of host publicationNew Prospects in Geotechnical Engineering Aspects of Civil Infrastructures : Proceedings of the 5th GeoChina International Conference 2018 – Civil Infrastructures Confronting Severe Weathers and Climate Changes: From Failure to Sustainability, held on July 23 to 25, 2018 in HangZhou, China
EditorsHadi Khabbaz, Heejung Youn, Mounir Bouassida
PublisherSpringer
Publication date2018
Pages127-139
Article numberSUCI-D-17-00230
ISBN (Print)978-3-319-95770-8
ISBN (Electronic)978-3-319-95771-5
DOIs
Publication statusPublished - 2018
EventThe 5th GeoChina International Conference 2018: Civil Infrastructures Confronting Severe Weathers and Climate Changes Conference - HangZhou, China
Duration: 23 Jul 201825 Jul 2018
Conference number: 5

Conference

ConferenceThe 5th GeoChina International Conference 2018
Number5
CountryChina
CityHangZhou
Period23/07/201825/07/2018
SeriesSustainable Civil Infrastructures
ISSN2366-3405

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