FAQ 002418 EN

15 February 2019

Markus Baumgärtel Design RFEM RF-CONCRETE

How do I model and design an opening or a big opening in a reinforced concrete beam?

Answer

For modelling, a surface model with result beams is usually suitable (see Figure 01). With a result beam, the internal forces of a surface can be integrated and output as member internal forces. Another advantage is that it is possible to design result beams with the specification of a cross-section in the RF‑CONCRETE Members add‑on module.

In the upper model of the example file, the result beam was defined over the entire length of the beam (see Figure 02). In the lower model, on the other hand, the result beams were assigned exactly each to the individual area. Accordingly, the result diagrams shown in Figure 03 are obtained.

The design in RF‑CONCRETE Members results in the reinforcement drawings shown in Figure 04. For the upper model, the correct distribution of the reinforcement in the area of the opening would still have to be adjusted manually. In the lower model, however, the reinforcement is distributed exactly according to the cross-section dimensions of the result beams.

There is a technical article on this topic in our Knowledge Base, which you can find under Links below.

Keywords

Opening Opening reinforced concrete beam

Reference

Downloads

Links

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
RFEM Concrete Structures
RF-CONCRETE 5.xx

Add-on Module

Design of reinforced concrete members and surfaces (plates, walls, planar structures, shells)

Price of First License
810.00 USD