RF-CONCRETE Members Version 5

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RF-CONCRETE Members Version 5

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9.1.2 Initial Values of Deformation Analysis

Initial Values of Deformation Analysis

Parameters
Table 9.0

Mean modulus of elasticity

Ecm = 30,000 MN / m2

Mean tensile strength

fctm = 2.2 MN / m2

Final creep ratio

φ = 1.8 (interior room)

Coefficient of shrinkage

εs = - 0.5 ‰

Longitudinal reinforcement ratio

ρe = Asb · d = 4.45 cm2100 · 20 cm2 = 0.002225 

αe = EsEc = 200 00010 000 = 20.0 

Effective modulus of elasticity for concrete

Ec,eff = Ecm1 + φ = 30 0001 +2.0 = 10 000 MN/m2 

The influence of creeping is taken into account with the final creep coefficient φ.

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