Behavior of tendon profile and distribution of prestressed internal load

A cubical spline interpolation function is put forward to show the tendon profile of prestressed bars because the tendon profile can't be accurately expressed by the quadric parabola. With the cubical spline, the spatial location of tendon's inflexion and the way to calculate prestressed internal load are both given theoretically and the nonlinear distribution of prestressed internal load is revealed. In addition, two samples of prestressed RC …