engleski

Numerical Model for Posttensioning Concrete Structures

Paper presents a numerical model developed for the computations od posttensioned plane structures. The prestressed cables and the reinforcement are modelled using one-dimensional curvilinear elements ; thus they can be determined independently of the two-dimensional finite element mesh amd can occupy general position. The computations for posttensioning structures is organized in phases. In the phase which precedes the prestressing of the cables the structures is computed taking into account the dead load and one part of the permanent load. In the prestressing phase the cables are tensioned individually. The prestress force can be applied at once or incrementally. In the third phase, which follows the tensioning of all cables, the structure is computed taking into account the remaining part of the dead load and the live load. The developed model was tested on a few examples.

numerical model; posttensioned concrete structures; prestressed cables; reinforcement

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