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(Solved): A simply supported pretensioned concrete beam has dimensions as shown and spans 15 m . It has an ini ...
A simply supported pretensioned concrete beam has dimensions as shown and spans 15 m . It has an initial prestress force of 1100 kN applied to it and it carries a uniformly distributed imposed load of
12k(N)/(m). Determine the extreme fibre stresses at midspan: I. Determine the geometric properties of the beam section. II. Under the self-weight of the beam, if the short-term losses are 10% and the eccentricity is 325 mm below the beam centroid III. Under service load, when the prestress force has been reduced by a further 10% Given: For plain unreinforced concrete
Y=24k(N)/(m^(3)). For concrete with normal percentage of reinforcement or prestressing steel
\gamma =25
k(N)/(m^(3)).
