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FAQ 003586 | I have modeled a floor slab with a downstand beam that intersects a continuous column. How can I prevent the slab from resting on the column, but on the downstand beam only?
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I have modeled a floor slab with a downstand beam that intersects a continuous column. How can I prevent the slab from resting on the column, but on the downstand beam only?Answer
To ensure that the floor only rests on the downstand beam in this situation (Figure 01), it is recommended to model a minimum opening within the floor surface, see Figure 02.
Figure 01 - Isometry, Transparent
Figure 02 - Surface with Opening
In order to keep the members or the lines of the members integrated into the surface, you can apply the "Connect Lines/Members" function subsequently to the entire model at once. Thus, it is ensured that the floor slab is still on the downstand beams.
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Dlubal FAQ Load application Downstand beam Column Slab Support Frequently Asked Question FAQ about Dlubal Question and Answer about Dlubal
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New
Displaying Resulting Support Force
In RFEM 5 and RSTAB 8, you can display the resulting support force related to the centroid of the model. It can be used, for example, to check the model and load data.
![External Pressure Coefficients, Cp, for Domed Roofs with a Circular Base (according to Figure 27.3-2 [1])](/-/media/Images/website/img/000001-010000/009001-009100/009063.png?la=en-US&mlid=212BADE826004E5F93E6ECC01B32C63F&hash=2DA91CF2E074D7591913F902C7B4F5C959981326)
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Increased Calculation Performance by Reducing the Nodal Degrees of Freedom
The number of degrees of freedom in a node is no longer a global calculation parameter in RFEM (6 degrees of freedom for each mesh node in 3D models, 7 degrees of freedom for the warping torsion analysis). Thus, each node is generally considered with a different number of degrees of freedom, which leads to a variable number of equations in the calculation.
This modification speeds up the calculation, especially for models where a significant reduction of the system could be achieved (e.g. trusses and membrane structures).
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