This article was translated by Google Translator View original text

How can a downstand beam be retroactively modeled under an existing floor so that only vertical compressive forces are transferred?

Answer

In this case, the slab should rest on the downstand beam without any bond, see Figure 1.

Figure 01 - Ceiling with downstand beam

First, assign the "Beam member" member type to the downstand beam because the rib is not effective here due to the missing joint.

To implement the nonlinearity "Only transfer of compressive forces in Z-direction", you can use the "Line Release" function. In this case, all forces and moments must be activated, that is, released, within the "New Line Release Type" dialog box. Moreover, for u z, the nonlinearity "Fixed if v z positive" must be set, see Figure 2.

Figure 02 - Line Release Type

The line of the member within the corresponding surface must be selected as the released line, as well as the corresponding surface as the released object.

Keywords

Line release Later Downstand beam Shear coupling Composite Contact

Contact us

Contact to Dlubal

Did you find your question?
If not, contact us via our free e-mail, chat, or forum support, or send us your question via the online form.

+49 9673 9203 0

info@dlubal.com

RFEM Main Program
RFEM 5.xx

Main Program

Structural engineering software for finite element analysis (FEA) of planar and spatial structural systems consisting of plates, walls, shells, members (beams), solids and contact elements

Price of First License
3,540.00 USD