Circular/Elliptical Section

@MATERIAL_01 {Mat1}
@COMMENTS {CommentText}


  • ShapeBuilder can generate beam cross-sections in the shape of a circular or elliptical sections. To define a circular/elliptical section, use the following parameters.
    1. @SHAPE_GROUP: SOLID, and
  • The base section is a circular/elliptical section, as illustrated in figs. 1 and 2. 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/elliptical section: base configuration

  • The base configurations of the circular and elliptical sections are shown in fig. 1 and 2. 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. If dimension RB is not defined, RB = RA and the section is circular, see fig. 1.
Figure 1. Configuration of the circular section.Figure 2. Configuration of the elliptical section.
Component Dimension Symbol Default Nb.
Circular section radius RA required 01
Circular section radius RB RA 02
Table 1. Dimensions defining the geometry
of the circular/elliptical section.
  • The circular section features a single zone.
    1. Zone 1.
      • Comprises the following faces: Core, Quadrant1, Quadrant2, Quadrant3, and Quadrant4.
      • Is associated with homogeneous material properties, Mat.