Fx Copy
LaTeX Copy
Prestress Drop is the drop in applied prestress force due to strain in tendons. Check FAQs
Δfp=Es(εc1+εc2)
Δfp - Prestress Drop?Es - Modulus of Elasticity of Steel Reinforcement?εc1 - Strain due to Compression?εc2 - Strain due to Bending?

Prestress Drop given Strain due to Bending and Compression in Two Parabolic Tendons Example

With values
With units
Only example

Here is how the Prestress Drop given Strain due to Bending and Compression in Two Parabolic Tendons equation looks like with Values.

Here is how the Prestress Drop given Strain due to Bending and Compression in Two Parabolic Tendons equation looks like with Units.

Here is how the Prestress Drop given Strain due to Bending and Compression in Two Parabolic Tendons equation looks like.

106000Edit=200000Edit(0.5Edit+0.03Edit)
You are here -

Prestress Drop given Strain due to Bending and Compression in Two Parabolic Tendons Solution

Follow our step by step solution on how to calculate Prestress Drop given Strain due to Bending and Compression in Two Parabolic Tendons?

FIRST Step Consider the formula
Δfp=Es(εc1+εc2)
Next Step Substitute values of Variables
Δfp=200000MPa(0.5+0.03)
Next Step Prepare to Evaluate
Δfp=200000(0.5+0.03)
Next Step Evaluate
Δfp=106000000000Pa
LAST Step Convert to Output's Unit
Δfp=106000MPa

Prestress Drop given Strain due to Bending and Compression in Two Parabolic Tendons Formula Elements

Variables
Prestress Drop
Prestress Drop is the drop in applied prestress force due to strain in tendons.
Symbol: Δfp
Measurement: PressureUnit: MPa
Note: Value should be greater than 0.
Modulus of Elasticity of Steel Reinforcement
Modulus of Elasticity of Steel Reinforcement is a measure of its stiffness.
Symbol: Es
Measurement: PressureUnit: MPa
Note: Value should be greater than 0.
Strain due to Compression
Strain due to Compression refers to the component of strain in the level of tendon A due to pure compression.
Symbol: εc1
Measurement: NAUnit: Unitless
Note: Value should be greater than 0.
Strain due to Bending
Strain due to Bending is the strain in the level of tendon A due to bending action.
Symbol: εc2
Measurement: NAUnit: Unitless
Note: Value should be greater than 0.

Other Formulas to find Prestress Drop

​Go Prestress Drop
Δfp=EsΔεp
​Go Prestress Drop given Modular Ratio
Δfp=mElasticfconcrete
​Go Prestress Drop given Stress in concrete at Same Level due to Prestressing Force
Δfp=EsfconcreteEconcrete
​Go Prestress Drop when Two parabolic Tendons are Incorporated
Δfp=Esεc

Other formulas in Post Tensioned Members category

​Go Area of Concrete Section given Prestress Drop
Ac=mElasticPBΔfp
​Go Stress in Concrete given Prestress Drop
fconcrete=ΔfpmElastic
​Go Average Stress for Parabolic Tendons
fc,avg=fc1+23(fc2-fc1)
​Go Component of Strain at Level of First Tendon due to Bending
εc2=ΔLL

How to Evaluate Prestress Drop given Strain due to Bending and Compression in Two Parabolic Tendons?

Prestress Drop given Strain due to Bending and Compression in Two Parabolic Tendons evaluator uses Prestress Drop = Modulus of Elasticity of Steel Reinforcement*(Strain due to Compression+Strain due to Bending) to evaluate the Prestress Drop, The Prestress Drop given Strain due to Bending and Compression in Two Parabolic Tendons is defined as the equation for finding the loss of prestress in a section when two tendons, say A and B, are used. The loss in A is given above when tendon B is tensioned. Prestress Drop is denoted by Δfp symbol.

How to evaluate Prestress Drop given Strain due to Bending and Compression in Two Parabolic Tendons using this online evaluator? To use this online evaluator for Prestress Drop given Strain due to Bending and Compression in Two Parabolic Tendons, enter Modulus of Elasticity of Steel Reinforcement (Es), Strain due to Compression c1) & Strain due to Bending c2) and hit the calculate button.

FAQs on Prestress Drop given Strain due to Bending and Compression in Two Parabolic Tendons

What is the formula to find Prestress Drop given Strain due to Bending and Compression in Two Parabolic Tendons?
The formula of Prestress Drop given Strain due to Bending and Compression in Two Parabolic Tendons is expressed as Prestress Drop = Modulus of Elasticity of Steel Reinforcement*(Strain due to Compression+Strain due to Bending). Here is an example- 0.106 = 200000000000*(0.5+0.03).
How to calculate Prestress Drop given Strain due to Bending and Compression in Two Parabolic Tendons?
With Modulus of Elasticity of Steel Reinforcement (Es), Strain due to Compression c1) & Strain due to Bending c2) we can find Prestress Drop given Strain due to Bending and Compression in Two Parabolic Tendons using the formula - Prestress Drop = Modulus of Elasticity of Steel Reinforcement*(Strain due to Compression+Strain due to Bending).
What are the other ways to Calculate Prestress Drop?
Here are the different ways to Calculate Prestress Drop-
  • Prestress Drop=Modulus of Elasticity of Steel Reinforcement*Change in StrainOpenImg
  • Prestress Drop=Modular Ratio for Elastic Shortening*Stress in Concrete SectionOpenImg
  • Prestress Drop=Modulus of Elasticity of Steel Reinforcement*Stress in Concrete Section/Modulus of Elasticity ConcreteOpenImg
Can the Prestress Drop given Strain due to Bending and Compression in Two Parabolic Tendons be negative?
No, the Prestress Drop given Strain due to Bending and Compression in Two Parabolic Tendons, measured in Pressure cannot be negative.
Which unit is used to measure Prestress Drop given Strain due to Bending and Compression in Two Parabolic Tendons?
Prestress Drop given Strain due to Bending and Compression in Two Parabolic Tendons is usually measured using the Megapascal[MPa] for Pressure. Pascal[MPa], Kilopascal[MPa], Bar[MPa] are the few other units in which Prestress Drop given Strain due to Bending and Compression in Two Parabolic Tendons can be measured.
Copied!