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dc.contributor.authorHawkins, William John
dc.date.accessioned2019-11-15T15:25:10Z
dc.date.available2019-11-15T15:25:10Z
dc.date.issued2020-03-21
dc.date.submitted2019-07-19
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/298919
dc.description.abstractRapid urbanisation and population growth is driving unprecedented levels of building construction. Over the next 40 years, approximately 230 billion square meters of new floor area will be constructed globally, a doubling of existing building stock. Already, the production of concrete and steel accounts for a third of worldwide industrial CO2 emissions, representing a major opportunity, and responsibility, for structural engineers to contribute towards a low-carbon future through efficient design. A significant majority of the structural material in a typical building exists within the floors, making these a prime target for material reductions. This dissertation shows that thin shell concrete floors are a viable alternative to typical slabs and beams in multi-storey buildings. Switching the dominant structural behaviour from bending to membrane action increases efficiency, enabling significant embodied carbon reductions. A system is proposed featuring pre-cast textile reinforced concrete shells of uniform thickness and shallow depth, supported at columns, with a network of prestressed steel tension ties. A lightweight foamed concrete fill is cast above the shells to provide a level top surface and transfer floor loads to the shell. The structural behaviour of this system is explored through a series of computational and experimental investigations, leading to refinement of the design, exploration of construction methods and the development of a complete design methodology incorporating novel theoretical work. The shells feature optimised singly-curved groin vault geometry. This provides efficient structural performance whilst simultaneously minimising construction complexity. Thus, a practical and scalable solution is proposed, which is shown to offer considerable embodied carbon savings over typical concrete and steel floor structures. This work provides a robust platform for future refinement and large-scale implementation of thin-shell concrete floors for sustainable buildings.
dc.description.sponsorshipEPSRC Centre for Decarbonisation of the Built Environment (dCarb), University of Bath Building Research Establishment Trust (BRE) Trust Department of Engineering, University of Cambridge
dc.language.isoen
dc.rightsAttribution-ShareAlike 4.0 International (CC BY-SA 4.0)
dc.rights.urihttps://creativecommons.org/licenses/by-sa/4.0/
dc.subjectConcrete shells
dc.subjectStructural optimisation
dc.subjectBuilding structures
dc.subjectFloors
dc.subjectEmbodied carbon
dc.subjectConstruction
dc.subjectSustainability
dc.subjecttextile reinforced concrete
dc.titleThin-shell Concrete Floors for Sustainable Buildings
dc.typeThesis
dc.type.qualificationlevelDoctoral
dc.type.qualificationnameDoctor of Philosophy (PhD)
dc.publisher.institutionUniversity of Cambridge
dc.publisher.departmentEngineering
dc.date.updated2019-11-13T17:19:15Z
dc.identifier.doi10.17863/CAM.45976
dc.contributor.orcidHawkins, William John [0000-0003-4918-7665]
dc.publisher.collegeDarwin
dc.type.qualificationtitlePhD in Engineering
cam.supervisorOrr, John
cam.supervisorShepherd, Paul
cam.supervisorIbell, Tim
cam.supervisor.orcidOrr, John [0000-0003-2687-6353]
cam.supervisor.orcidShepherd, Paul [0000-0001-7078-4232]
cam.supervisor.orcidIbell, Tim [0000-0002-5266-4832]
cam.thesis.fundingfalse


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Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
Except where otherwise noted, this item's licence is described as Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)