Abstract
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This paper discusses the determination of prestressing force in statically
indeterminate structures, where the prestressing force produces a secondary moment
in addition to the primary moment. This condition is different from statically
determinate ones as there is no secondary moment. In this paper the moment due to
prestressing force is assumed to be a direct function of the prestressing force
multiplied by a coefficient-² thus the prestressing force is obtained from the stress
conditions of the bottom and top fibres under external loading. To show the
application of the proposed procedure, a three-storey building is taken as an
example.