الفهرس 
- LITERATURE REVlEW.Only 14 pages are availabe for public view
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Abstract
Post-tensioned (PT) flat slabs are a commonly used construction system in
multi-story buildings worldwide. This is due to time saving caused by
early removal of fonnwork, as well as overall cost saving compared to
traditional reinforced concrete flat slabs. The savings are expected from
the small concrete dimensions ofPT slabs and consequently reduced loads
on columns and foundations. A reduced cost of overall steel reinforcement
is also achieved. This construction technique can be utilized in several
applications such as parking garages, office, residential, and industrial
buildings. Design of PT slabs can be accomplished using approximate
methods presented by different codes of practice, which can only be
applied for slabs with regular column arrangements. However, irregular
structures with complex geometries need to be analyzed using other
analytical approaches such as the finite element method (FEM). In this
thesis, literature of commonly used construction techniques and design
guidelines of PT slabs are reviewed. Different code requirements for the
analysis and design of PT slabs like ECCS 203-2001, CSA standard
A23.3-94, BS8110- part 1997, and ACI 318M-02 are introduced and compared. An analytical model of PT slabs using available computer
codes is also introduced. The results of this model, in terms of
deformations under service loading conditions, are compared to the results
of other commercially available codes specifically made for PT slabs to
establish the validity of the introduced model. Behaviour of the slabs with
different aspect ratios, and different layouts of prestressing tendons is
investigated. Behaviour of PT flat slabs under different appJied live load
levels is also studied including its effect on the assumed PT slab concrete
dimensions, amounts of prestressing steel reinforcement, and prestressing
level. Cost comparisons of PT and reinforced concrete slabs are discussed
in each case of the studied variables. Finally, design recommendations of
post-tensioned flat slabs are suggested.
Keywords: Cost; Flexural capacity; Code comparison; FEM; posttensioned
flat slabs; structural model; tendon patterns