Authors

Abstract

A three-dimensional finite element computer program ( 3DMPCP ) has
been developed to investigate the behaviour of prestressed reinforced concrete
beams and to predict their ultimate loads. To verify the ability of this computer
program in predicting the correct behaviour of prestressed concrete beams, analysis
of a simply supported prestressed reinforced concrete tee beam was carried out.
The beam section is 1.12 m deep, 2.44 m flange width and it is designed for a span
of 32.3 m from support to support. The test load, 0.85(1.4 DL. + 1.7 LL.), was
applied to the beam and flexural cracks were observed at midspan. The finite
element analysis has indicated that numerical load-central deflection curve
obtained is in good agreement with the experimental one. The analysis also gives
the expectation for the ultimate load value. Distribution of concrete normal stress
throughout a cross section and along the beam, at different stages of loading , are
presented

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