The paper deals with the shear strength of prestressed hollow-core
slabs determined by the theory of plasticity. Two failure
mechanisms are considered in order to derive the solutions.In the
case of sliding failure in a diagonal crack, the shear strength is
determined by means of the crack sliding model developed by
Jin-Ping Zhang. The model takes into account the resistance
against formation of cracks due to prestressing as well as the
variation of the prestressing force in the transfer zone.Due to
the fact that the anchorage of the reinforcement takes place by
bond, a rotation failure, which is induced by a crack formed at
the support with subsequent slip of the reinforcement, is also
considered. This failure mode is likely to occur in cases with a
high prestressing force combined with a short shear span.The
theoretical calculations are compared with test results from the
literature. A good agreement has been found.

Number of pages | 37 |
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Publication status | Published - 1997 |
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R-30