3.3.1: Beam Cross Sections
Karamba3D offers five basic types of beam cross section:
- circular tube – the default
- hollow box section
- filled trapezoid section
Fig. 3.3.1: Cantilever with four different kinds of cross section
Fig. 3.3.1 shows a cantilever with cross section properties defined directly at the “LineToBeam”-component. Without eccentricities defined, the beam axis always coincides with the centroid of a cross section. Changing e.g the upper flange width of an I-section therefore results in a slight movement of the whole section in the local Z-direction. In case the position of e.g. the upper side of a cross section needs to be fixed, specify an eccentricity. This can be done either via a specific component (see section 3.3.7) or through the input-plug “Ecce-loc”. Provide a vector there in order to move the cross sections relative to the beam axis. The given eccentricity is relative to the local coordinate system of the beam. The resulting position of the centroid can be retrieved from the “Disassemble Cross Section”-component (see section 3.3.4).
Apart from the input-plugs that define the cross section geometry, the “Elem|Id”- and the “Ecce-loc”-input there are: