This article was translated by Google Translator View original text

FAQ 002683 EN

26 March 2019

Daniel Dlubal Results RSTAB RFEM

Why is the deflection of a reinforced concrete beam in RSTAB / RFEM in condition 1 different from my manual calculation?


It is often the case that the selection of out-of-date materials may have an impact on the deformation of the beam. Please note that the material properties should always be taken from the respective standard. The material properties of the same material may differ depending on the standard and its National Annex.

For example, the same concrete was selected in this example, but the concrete has C35 / 45 | DIN 1045-1 compared with concrete C35 / 45 | DIN EN 1992-1-1 concerning a smaller modulus of elasticity (see Figure 1). Consequently, a larger deflection is created in the mid-span of the reinforced concrete beam, which is only loaded by its self-weight (see Figure 2).


Deflection Deformation Materials Hand calculation Modulus


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

RSTAB Main Program
RSTAB 8.xx

Main Program

The structural engineering software for design of frame, beam and truss structures, performing linear and nonlinear calculations of internal forces, deformations, and support reactions

Price of First License
2,550.00 USD
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