Loss in Prestress given Creep Strain Calculator

✖Modulus of Elasticity of Steel Reinforcement is a measure of its stiffness.ⓘ Modulus of Elasticity of Steel Reinforcement [E_s]			+10% -10%
✖Ultimate Creep Strain is caused due to the sustained load for a long period of time.ⓘ Ultimate Creep Strain [ε_cr,ult]			+10% -10%

✖Loss in Prestress is the loss found in the prestress due to shrinkage or creep or anchorage slip etc.ⓘ Loss in Prestress given Creep Strain [Δf_loss]

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Formula

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Loss in Prestress given Creep Strain

Formula

`"Δf"_{"loss"} = "E"_{"s"}*"ε"_{"cr,ult"}`

Example

`"160GPa"="200000MPa"*"0.8"`

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Download Loss due to Anchorage Slip, Friction Loss and General Geometric Properties Formulas PDF

Loss in Prestress given Creep Strain Solution

STEP 0: Pre-Calculation Summary

Formula Used

Loss in Prestress = Modulus of Elasticity of Steel Reinforcement*Ultimate Creep Strain
Δf_loss = E_s*ε_cr,ult
This formula uses 3 Variables

Variables Used

Loss in Prestress - (Measured in Gigapascal) - Loss in Prestress is the loss found in the prestress due to shrinkage or creep or anchorage slip etc.
Modulus of Elasticity of Steel Reinforcement - (Measured in Gigapascal) - Modulus of Elasticity of Steel Reinforcement is a measure of its stiffness.
Ultimate Creep Strain - Ultimate Creep Strain is caused due to the sustained load for a long period of time.

STEP 1: Convert Input(s) to Base Unit

Modulus of Elasticity of Steel Reinforcement: 200000 Megapascal --> 200 Gigapascal (Check conversion here)
Ultimate Creep Strain: 0.8 --> No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

Δf_loss = E_s*ε_cr,ult --> 200*0.8

Evaluating ... ...

Δf_loss = 160

STEP 3: Convert Result to Output's Unit

160000000000 Pascal -->160 Gigapascal (Check conversion here)

FINAL ANSWER

160 Gigapascal <-- Loss in Prestress

(Calculation completed in 00.004 seconds)

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Home » Engineering » Civil » Structural Engineering » Prestressed Concrete » Losses of Prestress » Loss due to Anchorage Slip, Friction Loss and General Geometric Properties » Losses due to Creep and Shrinkage » Loss in Prestress given Creep Strain

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NSS College of Engineering (NSSCE), Palakkad

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< 7 Losses due to Creep and Shrinkage Calculators

Loss in Prestress given Creep Strain

Go Loss in Prestress = Modulus of Elasticity of Steel Reinforcement*Ultimate Creep Strain

Ultimate Shrinkage Strain given Loss in Prestress

Go Shrinkage Strain = Loss in Prestress/Modulus of Elasticity of Steel Reinforcement

Loss in Prestress given Shrinkage Strain

Go Loss in Prestress = Modulus of Elasticity of Steel Reinforcement*Shrinkage Strain

Creep Coefficient given Creep Strain

Go Creep Coefficient of Prestress = Ultimate Creep Strain/Elastic Strain

Elastic Strain given Creep Strain

Go Elastic Strain = Ultimate Creep Strain/Creep Coefficient of Prestress

Ultimate Creep Strain

Go Ultimate Creep Strain = Creep Coefficient of Prestress*Elastic Strain

Shrinkage Strain for Post tensioning

Go Shrinkage Strain = 0.002/(log10(Age of Concrete+2))

Loss in Prestress given Creep Strain Formula

Loss in Prestress = Modulus of Elasticity of Steel Reinforcement*Ultimate Creep Strain
Δf_loss = E_s*ε_cr,ult

When Circular Prestressing is is done?

Liquid retaining structures, such as circular pipes, tanks and pressure vessels are having hoop tension developed due to the initial fluid pressure. A reinforced concrete pressure pipe requires a large amount of reinforcement to ensure low tensile stresses. But the circumferential hoop compression induced in concrete by prestressing counter balances, the hoop tension developed. In addition, circular prestressing safe guard against shrinkage cracks is liquid retaining structures provide economical use of the materials.

How to Calculate Loss in Prestress given Creep Strain?

Loss in Prestress given Creep Strain calculator uses Loss in Prestress = Modulus of Elasticity of Steel Reinforcement*Ultimate Creep Strain to calculate the Loss in Prestress, The Loss in Prestress given Creep Strain is defined as the formula for finding loss of prestress in tendon due to creep effect. Loss in Prestress is denoted by Δf_loss symbol.

How to calculate Loss in Prestress given Creep Strain using this online calculator? To use this online calculator for Loss in Prestress given Creep Strain, enter Modulus of Elasticity of Steel Reinforcement (E_s) & Ultimate Creep Strain (ε_cr,ult) and hit the calculate button. Here is how the Loss in Prestress given Creep Strain calculation can be explained with given input values -> 1.6E-7 = 200000000000*0.8.

FAQ

What is Loss in Prestress given Creep Strain?

The Loss in Prestress given Creep Strain is defined as the formula for finding loss of prestress in tendon due to creep effect and is represented as Δf_loss = E_s*ε_cr,ult or Loss in Prestress = Modulus of Elasticity of Steel Reinforcement*Ultimate Creep Strain. Modulus of Elasticity of Steel Reinforcement is a measure of its stiffness & Ultimate Creep Strain is caused due to the sustained load for a long period of time.

How to calculate Loss in Prestress given Creep Strain?

The Loss in Prestress given Creep Strain is defined as the formula for finding loss of prestress in tendon due to creep effect is calculated using Loss in Prestress = Modulus of Elasticity of Steel Reinforcement*Ultimate Creep Strain. To calculate Loss in Prestress given Creep Strain, you need Modulus of Elasticity of Steel Reinforcement (E_s) & Ultimate Creep Strain (ε_cr,ult). With our tool, you need to enter the respective value for Modulus of Elasticity of Steel Reinforcement & Ultimate Creep Strain and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

How many ways are there to calculate Loss in Prestress?

In this formula, Loss in Prestress uses Modulus of Elasticity of Steel Reinforcement & Ultimate Creep Strain. We can use 1 other way(s) to calculate the same, which is/are as follows -

Loss in Prestress = Modulus of Elasticity of Steel Reinforcement*Shrinkage Strain

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