FAQ 000161 ZH

Calculation RF-BGDK

Why there is a difference between zeta factor used in LTB 5 and factors from literature references, or LTB 3?


The zeta factor = pressure force distribution is a correction factor allowing for determination of elastic critical moment Mcr for certain boundary conditions and loads.

In LTB 5, the zeta correction factor always refers to the greatest bending moment of the equivalent member. Contradictory information in literature concerning this matter specify the zeta factor referring to the middle of the equivalent member (see LTB manual, Chapter 2.4.2, page 19ff).

However, LTB 5 also provides an  option to define the zeta factor manually. For this, select in chapter DETERMINATION TYPE M-cr -> Assign LC/LG separately.


联系 Dlubal


+49 9673 9203 0




Erste Schritte

我们在这里为初学者提供了重要的提示和建议,以便用户更加容易快速的掌握使用我们的基本软件 RFEM 和 RSTAB。