In general, for all Internal Tendons in RM Bridge, there is no Radius definition as it’s only used for External Tendons definitions, inside the Deviators zone. Therefore, usually, instead of using a Radius (r), the user should use the Development length (s) of a Circular sector or Circular segment to define it from the Angle (θ) with the units in radians [rad] where:

s=θr

    

This is generally achieved by defining two consecutive points in the Tendon Geometry definition with a relative distance between them set at x/L in conjunction with the vertical/lateral distance in elevation or plane (d).

The unit conversion from radians to degrees is achieved by:

Angle(θº)=θπ/180

So, in the end, for the angle (θ) in degrees and the Radius (r) the segment of curvature (s) is achieved by:

s=rθπ/180