D5.D.8.6 Clause 6.3.2.3(2) – Modification factor, f, for LTB checks

STAAD.Pro uses the value of the modification factor, f, as per eqn 6.58 of PN-EN 1993-1-1. The correction factor, k_c, will be evaluated as:

k_{c} = \sqrt{C_{mLT}}

where

C_mLT

the equivalent uniform moment factor from table B.3 of PN-EN 1993-1-1. C_mLT is evaluated based on the end conditions of the member and the shape of the bending moment diagram. However, if the KC parameter is used, then the program will use the specified value.