Creep coefficient defining creep between times `t` and `t₀`, `φ(t,t₀)`

Eurocode 2 part 1-1: Design of concrete structures 3.1.4 (2) and B.1 (1)

The creep coefficient φ(t,t₀) may be calculated from:

φ(t,t₀) = Φ₀⋅β_c(t,t₀)

(B.1)

where:

Φ₀: is the notional creep coefficient
β_c(t,t₀): is a coefficient to describe the development of creep with time after loading.

This application calculates the creep coefficient φ(t,t₀) from your inputs. Intermediate results will also be given.

Input

Concrete strength class

Age of concrete t

days

Age of concrete at loading t₀

days

Relative humidity of the ambient environment RH

Cross-sectional area A_c

mm²

Perimeter of the member in contact with the atmosphere u

Output

Mean compressive strength of concrete at 28 days f_cm

MPa Table 3.1

Notional size of the member h₀

mm (B.6)

α₁

(B.8c)

α₂

(B.8c)

α₃

(B.8c)

φ_RH

(B.3a or B.3b)

β(f_cm)

(B.4)

β(t₀)

(B.5)

Notional creep coefficient φ₀

(B.2)

β_H

(B.8a or B.8b)

Coefficient to describe the development of creep with time after loading β_c(t,t₀)

(B.7)

the creep coefficient φ(t,t₀)

(B.1)

Comments

Recipients