Development Of A Three-Dimensional Model For Ice Rubble Interactions On Conical Structures

Wong, Chee

Development Of A Three-Dimensional Model For Ice Rubble Interactions On Conical Structures

atmire.migration.oldid	1782
dc.contributor.advisor	Brown, Thomas
dc.contributor.author	Wong, Chee
dc.date.accessioned	2014-01-18T01:30:00Z
dc.date.available	2014-03-15T07:00:18Z
dc.date.issued	2014-01-17
dc.date.submitted	2014	en
dc.description.abstract	Offshore structures in waters where ice cover is prevalent from four to nine months a year have been constructed for the last 30 years to extract natural resources and to transport people and goods. Many of these structures are conical or sloped faced in shape, where flexural failure becomes the dominant mode of failure for the ice sheet. This reduces the magnitude of ice structure interaction loads in comparison to other modes of failure. In this particular study, ice interactions with the piers of the Confederation Bridge were examined. Since the 13 km bridge, spanning across the Northumberland Strait between the eastern Canadian provinces of Prince Edward Island and New Brunswick, opened in 1997, the Confederation Bridge Monitoring Program has been instituted to monitor ice interactions with the piers through the installation of video cameras, load sensors, and deformation sensors. Through 15 years of the Monitoring Program, archived video footage have shown that the highest interaction loads recorded on the piers are a result of ice rubble piles sitting on a level ice sheet and on the pier surface as the level ice sheet continues to fail in flexure. Various researchers have devised flexural failure models for ice and conical structure interactions. Each model shares the same principle of the ice sheet being modelled as a beam on an elastic foundation and each has different limitations in precisely predicting interaction loads. Some models do not incorporate the rubble pile, while other models make over simplified assumptions for three-dimensional behaviour. The proposed three-dimensional finite element model aims to reduce some of these limitations through: modelling the bilinear-shape ice rubble piles with a more rigorous slope stability method, modelling the geometry of the rubble around the cone through small-scale tests, adding a driving force in keeping the rubble pile intact during the interaction, and accounting for eccentric offsetting moments during ice-structure contact. Ten full-scale interaction events were chosen to validate the proposed model. Results of the model indicate good predictions of interaction loads for ice and conical structures.	en_US
dc.identifier.citation	Wong, C. (2014). Development Of A Three-Dimensional Model For Ice Rubble Interactions On Conical Structures (Master's thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca. doi:10.11575/PRISM/25677	en_US
dc.identifier.doi	http://dx.doi.org/10.11575/PRISM/25677
dc.identifier.uri	http://hdl.handle.net/11023/1270
dc.language.iso	eng
dc.publisher.faculty	Graduate Studies
dc.publisher.institution	University of Calgary	en
dc.publisher.place	Calgary	en
dc.rights	University of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.
dc.subject	Engineering--Civil
dc.subject.classification	Ice Load	en_US
dc.subject.classification	Ice Rubble	en_US
dc.subject.classification	Conical Structures	en_US
dc.subject.classification	Ice-Structure Interaction	en_US
dc.subject.classification	Ice Engineering	en_US
dc.subject.classification	Confederation Bridge	en_US
dc.title	Development Of A Three-Dimensional Model For Ice Rubble Interactions On Conical Structures
dc.type	master thesis
thesis.degree.discipline	Civil Engineering
thesis.degree.grantor	University of Calgary
thesis.degree.name	Master of Science (MSc)
ucalgary.item.requestcopy	true