Use of effective modulus of concrete

This value can be set in Concrete setting by using Advanced level or in 1D member data (advanced mode is ON). If this check box is ON, then effective module of elasticity is taken into account.

EN 1992-1-1 does not give instruction how creep under varying load should be taken into account for calculation of the crack width. The creep can be generally taken into account by assuming that effective module of elasticity (EN 1992-1-1, clause 5.8.7(2) ) for calculation modular ratio (E_s/E_c,eff ≈ 15). A Lower value of modular ratio (greater value of module of elasticity of concrete than effective ) may be used where less than 50 % of the stresses arise from quasi-permanent load. The different value of modulus of elasticity can be input directly in material properties, see picture below, but these changes has influence to FEM analysis too.