Calculation of second order effects

The EN 1992-1-1 defines several methods for analysis of second order effects with axial load (general method, simplified method based on nominal stiffness, simplified method based on nominal curvature...). The SCIA Engineer allows making analysis of second order effect by using the following methods, see chapter "Method of analysis second order effect"

• General method - equilibrium and resistance is verified in the deformed state, deformations are calculated taking into account the relevant effects of cracking, non-linear material properties and creep, see clause 5.8.2(2) in EN 1992-1-1.
• Simplified method based on nominal curvature according to EN 1992-1-1, clause 5.8.8
• Simplified method based on nominal stiffness according to EN 1992-1-1, clause 5.8.7

The second order effect by simplified method is taken into account:

• for ultimate limit state

• only for Member type = Column and it in case, that column is in compression see,"Determination whether member is in compression"

• combo box Method of analysis second order effect is set to Simplified method or Auto (general) and condition for using simplified method are fulfilled
• calculated slenderness is greater than limit slenderness, see"Introduction"