Long term deflection of reinforced high strength concrete beams

Abstract EN

High strength concrete is characterized by low creep strains compared with normal strength concrete.

This means that its long-term deflection is expected to be less than that of normal strength concrete.

This fact needs to be accounted for by the long-term deflection multiplier of the ACI Code [1].

This paper deals with the long-term deflection of reinforced concrete beams made of high strength concrete.

Five simply supported beams were loaded for about one year.

The experimental work was carried out to investigate the effects of concrete strength, reinforcement yield stress, span / depth ratio and loading type on the long-term deflection.

The long-term deflection multiplier of the ACI Code is re-evaluated to account for the effect of concrete strength.