Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/210971
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dc.titleTilt displacement of caisson breakwater due to wave loading
dc.contributor.authorZhang, XY
dc.contributor.authorLee, FH
dc.contributor.authorLeung, CF
dc.date.accessioned2021-12-17T03:10:41Z
dc.date.available2021-12-17T03:10:41Z
dc.date.issued2009-02-01
dc.identifier.citationZhang, XY, Lee, FH, Leung, CF (2009-02-01). Tilt displacement of caisson breakwater due to wave loading. GEOTECHNIQUE 59 (1) : 17-27. ScholarBank@NUS Repository.
dc.identifier.issn00168505
dc.identifier.issn17517656
dc.identifier.urihttps://scholarbank.nus.edu.sg/handle/10635/210971
dc.description.abstractTilting and overturning of caisson breakwaters due to wave loading is well documented. Although simplified methods of caisson analysis have been proposed, they are either fully elastic analyses that do not account for permanent displacement, or stability analyses that determine whether overturning will occur. In reality, a caisson can incur significant tilt without overturning: such a phenomenon cannot be replicated by either of the above analyses. This paper presents a simplified analysis that takes into account the elastic caisson response as well as the accumulation of permanent tilt with successive wave cycles. Elastic response was simulated using a lumpmass-spring model. Permanent caisson tilt was analysed based on the assumption of the caisson tilting over a circular slip surface beneath its base. A search algorithm was used to determine the radius and depth to the centre of rotation of the critical slip circle. Permanent tilt is generated by the difference between the overturning and stabilising moments during wave peaks. This allows permanent tilt to be accumulated over successive wave peaks. Comparison with centrifuge test data shows that the analysis is able to capture the progressive build-up of tilt reasonably well. Furthermore, comparison with a field case of caisson failure during a storm shows good correlation, although uncertainty over the number of wave cycles precludes a more direct comparison.
dc.language.isoen
dc.publisherTHOMAS TELFORD PUBLISHING
dc.sourceElements
dc.subjectScience & Technology
dc.subjectTechnology
dc.subjectEngineering, Geological
dc.subjectEngineering
dc.subjectcentrifuge modelling
dc.subjectelasticity
dc.subjectplasticity
dc.subjectsands
dc.typeArticle
dc.date.updated2021-12-17T02:17:18Z
dc.contributor.departmentDEPT OF CIVIL & ENVIRONMENTAL ENGG
dc.description.sourcetitleGEOTECHNIQUE
dc.description.volume59
dc.description.issue1
dc.description.page17-27
dc.published.statePublished
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