Curvature band
The curve of curvature is a true-to-scale graphic representation of the course of curvature and is part of a road and railroad plan. It is usually included in the drawing of the profile plan and represents the curvature of the route of the site plan. The curvature band is primarily used to determine the lateral inclination of the vehicle dynamics and to determine the design quality according to HBS .
construction
The construction of the curved belt is regulated in the RAS-L . The graphic representation is based on the RE .
The band of curvature is a line diagram-like representation. The horizontal reference line ( abscissa ) is to scale for the stationing of the route. The curvature is indicated by the curvature line. The distance between the line of curvature and the reference line ( ordinate ) is scaled to the curvature. The larger the radius of the curve, the smaller the distance between the reference line and the curvature line. For straight lines, the curvature line and the reference line are congruent. In the case of right-hand bends, the line of curvature is above the reference line for left-hand bends below.
example
The figure on the right shows a schematic curvature band for a route with the design element sequence straight line - clothoid - right curve - clothoid - straight line. In the section of the straight line (R = ∞) the curvature and reference lines are congruent. In the clothoid, the radius increases in inverse proportion to the length. The line of curvature moves away from the reference line. In the right curve the radius of the route remains constant (R = 600 m). The line of curvature runs parallel to the reference line. In the following clothoid, the line of curvature approaches the reference line again until the route has reached the straight line (R = ∞).
literature
- Günter Weise / Walter Durth: Road construction - planning and design . 3. Edition. Verlag für Bauwesen, Berlin 1997, ISBN 3-345-00579-4 , p. 1-436 .