All members are considered individually for the warping calculation, i.e. each member can warp freely at its end. There is no transfer of the momentum between adjacent members.
Continuous warping
Define a set of members to transfer the warping between individual members. For sets of members of the type ' Continuous Members ', the warping between all connected members is assumed to be continuous. The creation of sets of members is described in chapter Sets of Members of the RFEM manual.
For sets of members that do not exclusively contain members of the type 'Beams' or in which some members are assigned a cross-section with deactivated warping stiffness, only the warping of the beam members is considered to be continuous. At the ends of members that are calculated with 6 degrees of freedom, the warping is unobstructed.
Alternatively, members can be modeled without division. Intermediate nodes are created as 'nodes on member' and do not lead to a separation of the member into two objects. Such nodes on a member therefore do not lead to discontinuous warping. You can find information on this in the RFEM manual in chapter Split line/member.
Use the options above to set the transition conditions for warping between two members. At a node with more than two adjacent members, the warping can only be transferred between two members.
Before the calculation, the compatibility of the cross-sections in sets of members with regard to warping is examined as part of the plausibility check. Continuous warping between members is permitted without any further warning under the following conditions:
- Continuous median line
- same cross-section at the connected member ends
- same coordinate system of members
Discontinuous Torsional Warping
If you do not want continuous warping for a defined set of members, for example because the set of members is only used as a reference for input, you can activate the 'Discontinuous Warping Torsion' option in the edit dialog box. In this case, all members of the set of members are considered again with unhindered warping at their ends.
If a member is part of several sets of members with different properties, the continuity of the warping between the members has priority. Within all sets of members with the 'Discontinuous Warping Torsion option' deactivated, the warping curve is therefore continuous, regardless of whether the members are part of another set of members with the ' Discontinuous Warping Torsion option activated.