Is it possible to define the distribution coefficient ζ manually when calculating with RF-CONCRETE Deflect? In such a way that it could always be at least 0.5?


No, this is unfortunately not possible.

If the option 'Tension Stiffening' is not applied for the calculation, the distribution coefficient ζ is either '0' for 'uncracked' or '1' for 'cracked'. See also the technical article for the distribution of the distribution coefficient ζ linked below.

But the manual specification of e.g. ζ = 0.5 is not possible.


Distribution coefficient Zeta Deformation Deflection State II (cracked)



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

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

Add-on Module

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

Price of First License
810.00 USD
RFEM Concrete Structures
RF-CONCRETE Deflect 5.xx

Add-on Module

Analytical deformation analysis of plate structures consisting of reinforced concrete

Price of First License
400.00 USD