Behavior of Prestressed Concrete Rectangular Members Subjected to Pure Torsion

摘要

The object of this study is to investigate the behavior and strength of concentric and eccentric prestressed rectangular specimens subjected to pure torsion. Special emphasis is placed on: (a) the effect of the degree of prestress and the amount of reinforcement on the strength and rotational capacity, (b) the effect of eccentricity of prestressing force and the position of prestressing cables on strength and stiffness, (c) the effect of the transfer length for pre-tensioned members on strength and stiffness, (d) the variation, if any, between cracking strength of plain prestressed and reinforced prestressed specimens, (e) the difference in strength and behavior of bonded and unbonded specimens, and (f) the formulation of suitable prediction equations for initial stiffness and strength of prestressed specimens.