The picture shows the difference between three segments (four new nodes) and fifteen segments (sixteen new nodes) in moment distribution. In theory, the moment should be zero, but you can see there are strong peaks at the transitions in the case of three segments. In the case of fifteen segments, the peaks are barely visible and the moments are close to zero. Here, you have to select an appropriate value according to the requirements (accuracy or speed).
Arched Beams
In addition to straight beams, it is sometimes necessary to calculate or design arched or circular beams in RSTAB. For this purpose, there is a special feature under "Tools" → "Generate Model – Members" → "Circle". You can easily use this tool to generate a full or pitch circle. The most important parameter here is the number of new nodes, which affects the accuracy of the results.
Author
Mr. Günthel provides technical support for our customers.
Links
;