# Method of analysis for second order effects, based on nominal curvature: the nominal second order moment `M`_{2}

_{2}

## Eurocode 2 part 1-1: Design of concrete structures 5.8.8.2 (3)

The nominal second order moment `M _{2}` is defined by:

M = _{2}N _{Ed}e _{2} | (5.33) |

where:

`N`_{Ed}- is the design value of axial force
`e`_{2}- is the deflection,
`e`= (1/_{2}`r`)`l`_{0}^{2}/`c`

with

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`r` - the curvature.
`l`_{0}- the effective length, cf. 5.8.3.2
`c`- a factor depending on the curvature distribution.

For constant cross section,`c`= 10 is normally used. If the first order moment is constant, a lower value should be considered (8 is a lower limit, corresponding to constant total moment).

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This application calculates
the nominal second order moment `M _{2}`
from your inputs.