Thermal loss of prestress during the heat curing of precast concrete elements, ΔPθ
Eurocode 2 part 1-1: Design of concrete structures 10.5.2 (1)
The thermal loss of prestress during the heat curing of precast concrete elements may be estimated as follows:
| ΔPθ = 0,5 Ap Ep αc (Tmax - T0) | (10.3) |
where:
- Ap
- is the cross-sectional area of tendons
- Ep
- is the elasticity modulus of tendons, see § 3.3.6 (2) and § 3.3.6 (3)
- αc
- is the linear coefficient of thermal expansion for concrete. Following 3.1.3 (5), αc = 10⋅10-6 K-1 unless more accurate information is available.
- Tmax - T0
- is the difference between the maximum and initial temperature in the concrete near the tendons, in [°C].
This application calculates the thermal loss ΔPθ from your inputs.
