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Limits of moment redistribution

Allowed ratio of redistributed to elastic moment and the neutral axis limit it implies. Reference: EN 1992-1-1 5.5.

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Limits of moment redistribution: worked example sheet in Equation Pad with typeset equations and results.

Example only. This sheet shows one way to set out the check. It is not endorsed by the bodies that publish the design codes and does not reproduce them. Check every clause, value and assumption against your own copy of the current edition of Eurocode 2 and its national annex before you use it, and have the result checked by a competent person. See the disclaimer.

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# Inputs
f_ck := 30 MPa
delta := 0.85
k_1 := 0.44
k_2 := 1.25
k_5 := 0.7

# Limit
delta >= k_5 =
xi_max := (delta - k_1)/k_2 =
# With this redistribution, x_u/d must not exceed xi_max (for f_ck up to 50 MPa).

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