Circular Arc

@DIMENSION_03 {θi}
@DIMENSION_04 {θf}
@MATERIAL_01 {Mat1}
@COMMENTS {CommentText}


  • ShapeBuilder can generate beam cross-sections in the shape of a circular arc. To define a circular arc, use the following parameters.
  • The circular arc consists of a single zone. No options can be defined for this sectional shape.
  • Sectional shapes are defined in their own local coordinate system, which is assumed to coincide with the global coordinate system. If a fixed frame, FrameName, is specified, the local coordinate system coincides with this fixed frame.
  • The mesh density parameter, md, determines the level of mesh refinement. (Default: md = 4)
  • It is possible to attach comments to the definition of the object; these comments have no effect on its definition.

The circular arc: base configuration

Figure 1. Configuration of the circular arc.
  • The base configuration of the circular arc is shown in fig. 1. No options are available for this shape.
  • The geometric configuration of the circular section if defined by the dimensions listed in table 1, which are also indicated in fig. 1. Dimensions labeled in red are required. Dimensions labeled in blue are optional and are assigned the default value indicated in table 1.
Component Dimension Symbol Default Nb.
Circular arc radius Ro required 01
Circular arc radius Ri required 02
Circular arc angle θi required 03
Circular arc angle θf required 04
Table 1. Dimensions defining the geometry of the circular section.
  • The circular section features a single zone.
    1. Zone 1.
      • Comprises the following faces: Segment1, Segment2, Segment3, and Segment4.
      • Is associated with homogeneous material properties, Mat.