Abstract
This paper presents a method of analysis for externally prestressed concrete beams based on the deformation compatibility of beams and friction at the deviators. A large number of beams tested with external cables are simulated to verify the reliability of the analytical method adopted. The characteristic responses such as load vs. deflection and load vs. increase of cable stress are presented and discussed. A parametric study is also performed to investigate the effect of friction at the deviators on the behavior of externally prestressed concrete beams in four cases, namely, free slip, slip with friction, partially fixed and perfectly fixed. The predicted results are then discussed with emphasis on the effects of friction.
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