1 / 1

Modelling of Jack-up Foundations under Cyclic Loading

This research, sponsored by the ARC through an IREX exchange program between Oxford University and The University of Western Australia, aims to develop realistic models for jack-up unit foundations under cyclic combined loads. Utilizing "NewWave" theory to simulate extreme wave loading events, the study introduces "Model D," which employs continuous hyperplasticity to describe non-linear moment-rotation relationships. Theoretical analysis includes a dynamic evaluation of jack-ups in significant wave conditions, allowing for improved design and stability of offshore structures.

hoshi
Download Presentation

Modelling of Jack-up Foundations under Cyclic Loading

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. G.T. Houlsby (Oxford University) and M.J. Cassidy (The University of Western Australia) Modelling of Jack-up Foundations under Cyclic Loading This research is sponsored by the ARC as part of an IREX exchange programme between Oxford University and The University of Western Australia The waves are modelled by “NewWave” theory, which realistically describes an extreme loading event Purpose: to develop realistic models for the foundations of jack-up units when subjected to cyclic combined loads Visit us at www-civil.eng.ox.ac.uk or www.cofs.uwa.edu.au “Model D” uses “continuous hyperplasticity” to describe smooth moment-rotation relationships with increasing non-linearity as the moment is increased The spudcans are modelled by a new theoretical approach called “Model D”, which can describe the response of the foundation when any combination of {V,M,H} loads is applied Example dynamic analysis of a jack-up subjected to a 15m high wave in 90m water depth “Continuous hyperplasticity” is an approach to plasticity theory which has been developed by Prof. G.T. Houlsby and Dr A.M. Puzrin. The main advantage is that the entire theoretical model can be specified by defining just two scalar functionals. The theory can describe models with an infinite number of plastic strain components within a compact theoretical framework The equations required to specify “Model D” are: The graph above shows the load paths for windward and leeward footings. Below is the moment-rotation response for the windward footing where

More Related