Abstract
Time-dependent flexural deformation of prestressed reinforced concrete members made of high strength concrete subjected to sustained load is investigated experimentally, comparing with that of normal strength concrete members. Compressive strength of the former and that of the latter are approximately 100N/mm2 and 45N/mm2, respectively. The effect of autogenous shrinkage is incorporated into the creep analysis model. Furthermore, a new model for tension stiffening is presented, which is owing to the contribution of tensile stress of concrete at cracked sections as well as that of bond stress between concrete and reinforcing steel. The comparison of experiment and analysis shows the validity of the present method.
