Deflection of concrete slabs: current performance & design deflection limits

Tovi, Shivan (2017) Deflection of concrete slabs: current performance & design deflection limits. Doctoral thesis, University of West London.

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Abstract

Deflection is usually controlled by limiting the span/depth ratio. One aspect of this research is to document the deflection of a concrete slab in a large residential block. The other part of the research is to look at current design limits. Limits on deformation were set many decades ago, when the forms of construction, partitions, finishing, cladding and service were very different from what they are now. Part of that is to review the span-to-depth method of design.

Site investigation and testing theory through observation and data collection was the main deductive approach of this research. A quantitative method was used to calculate and determine the deflection on concrete slabs, the research is attempted to identify target companies and projects to participate in the research. The data indicate that the slab has not sagged significantly due to the back propping for 30 days. However, it does seem that the slab was sloping down from the corner by 6 mm diagonally across the 12m bay. A margin of deflection around 2mm occurred especially in the mid-span of the slab 12 x 7 m corner bay. The 2 mm deflection occurred at the beginning of the investigation after back propping reinforced concrete corner bay slab. The back propping applied after 7 days of pouring slab

Item Type: Thesis (Doctoral)
Uncontrolled Keywords: Slab deflection, design for serviceability limit state, span/depth ratio, Eurocode 2 design code.
Subjects: Construction and engineering
Depositing User: David Phillips
Date Deposited: 31 Aug 2017 13:32
Last Modified: 31 Aug 2017 13:32
URI: http://repository.uwl.ac.uk/id/eprint/3836

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