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Prestress Drop given Initial Prestress Force Formula

GoPrestress Drop given Pressure after Immediate Loss Formula

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Drop in Prestress is the drop in applied prestress force due to strain in tendons. Check FAQs

Δf Drop = P i \cdot \frac{m Elastic}{A Pretension}

Δf_Drop - Drop in Prestress?P_i - Initial Prestress Force?m_Elastic - Modular Ratio for Elastic Shortening?A_Pretension - Transformed Section Area of Prestress?

Prestress Drop given Initial Prestress Force Example

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Here is how the Prestress Drop given Initial Prestress Force equation looks like with Values.

Here is how the Prestress Drop given Initial Prestress Force equation looks like with Units.

Here is how the Prestress Drop given Initial Prestress Force equation looks like.

0.0104 = 435 \cdot \frac{0.6}{0.025}

0.0104MPa = 435kN \cdot \frac{0.6}{0.025mm²}

0.0104 = 435 \cdot \frac{0.6}{0.025}

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Prestress Drop given Initial Prestress Force Solution

Follow our step by step solution on how to calculate Prestress Drop given Initial Prestress Force?

FIRST Step Consider the formula

Δf Drop = P i \cdot \frac{m Elastic}{A Pretension}

Next Step Substitute values of Variables

∴

Δf Drop = 435kN \cdot \frac{0.6}{0.025mm²}

Next Step Prepare to Evaluate

∴

Δf Drop = 435 \cdot \frac{0.6}{0.025}

Next Step Evaluate

∴

Δf Drop = 10440Pa

Next Step Convert to Output's Unit

∴

Δf Drop = 0.01044MPa

LAST Step Rounding Answer

∴

Δf Drop = 0.0104MPa

Prestress Drop given Initial Prestress Force Formula Elements

Variables

Drop in Prestress

Drop in Prestress is the drop in applied prestress force due to strain in tendons.

Symbol: Δf_Drop

Measurement: PressureUnit: MPa

Note: Value should be greater than 0.

Formulas to find Drop in Prestress

Initial Prestress Force

Initial Prestress Force is the force which is applied to the tendons by the jack.

Symbol: P_i

Measurement: ForceUnit: kN

Note: Value should be greater than 0.

Formulas to find Initial Prestress Force

Modular Ratio for Elastic Shortening

Modular Ratio for Elastic Shortening is the ratio of the elastic modulus of a particular material in a cross-section to the elastic modulus of the “base” or the reference material.

Symbol: m_Elastic

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Modular Ratio for Elastic Shortening

Transformed Section Area of Prestress

Transformed Section Area of Prestress is the area of the member when steel is substituted by an equivalent area of concrete.

Symbol: A_Pretension

Measurement: AreaUnit: mm²

Note: Value should be greater than 0.

Formulas to find Transformed Section Area of Prestress

Other Formulas to find Drop in Prestress

Go Prestress Drop given Pressure after Immediate Loss

Δf Drop = (\frac{P o}{A Pre tension}) \cdot m Elastic

Other formulas in Pre Tensioned Members category

Go Modular Ratio given Prestress after Immediate Loss

m Elastic = Δf Drop \cdot \frac{A Pre tension}{P o}

Go Prestressing Force after Immediate Loss given Initial Prestress

P o = P i \cdot \frac{A Pre tension}{A Pretension}

Go Initial Prestress given Prestress after Immediate Loss

P i = P o \cdot \frac{A Pretension}{A Pre tension}

Go Initial Strain in Steel for Known Strain due to Elastic Shortening

ε pi = ε c + ε po

How to Evaluate Prestress Drop given Initial Prestress Force?

Prestress Drop given Initial Prestress Force evaluator uses Drop in Prestress = Initial Prestress Force*Modular Ratio for Elastic Shortening/Transformed Section Area of Prestress to evaluate the Drop in Prestress, The Prestress Drop given Initial Prestress Force is defined as decrease in prestress on tendons due to change in strain. Drop in Prestress is denoted by Δf_Drop symbol.

How to evaluate Prestress Drop given Initial Prestress Force using this online evaluator? To use this online evaluator for Prestress Drop given Initial Prestress Force, enter Initial Prestress Force (P_i), Modular Ratio for Elastic Shortening (m_Elastic) & Transformed Section Area of Prestress (A_Pretension) and hit the calculate button.

FAQs on Prestress Drop given Initial Prestress Force

What is the formula to find Prestress Drop given Initial Prestress Force?

The formula of Prestress Drop given Initial Prestress Force is expressed as Drop in Prestress = Initial Prestress Force*Modular Ratio for Elastic Shortening/Transformed Section Area of Prestress. Here is an example- 4.8E-9 = 435000*0.6/2.5E-08.

How to calculate Prestress Drop given Initial Prestress Force?

With Initial Prestress Force (P_i), Modular Ratio for Elastic Shortening (m_Elastic) & Transformed Section Area of Prestress (A_Pretension) we can find Prestress Drop given Initial Prestress Force using the formula - Drop in Prestress = Initial Prestress Force*Modular Ratio for Elastic Shortening/Transformed Section Area of Prestress.

What are the other ways to Calculate Drop in Prestress?

Here are the different ways to Calculate Drop in Prestress-

Drop in Prestress=(Prestressing Force after Loss/Pre-Tensioned Area of Concrete)*Modular Ratio for Elastic Shortening

Can the Prestress Drop given Initial Prestress Force be negative?

No, the Prestress Drop given Initial Prestress Force, measured in Pressure cannot be negative.

Which unit is used to measure Prestress Drop given Initial Prestress Force?

Prestress Drop given Initial Prestress Force 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 Initial Prestress Force can be measured.

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Prestress Drop given Initial Prestress Force Formula

​GoPrestress Drop given Pressure after Immediate Loss Formula

Prestress Drop given Initial Prestress Force Example

Prestress Drop given Initial Prestress Force Solution

Prestress Drop given Initial Prestress Force Formula Elements

Other Formulas to find Drop in Prestress

Other formulas in Pre Tensioned Members category

How to Evaluate Prestress Drop given Initial Prestress Force?

FAQs on Prestress Drop given Initial Prestress Force

Variable Name

GoPrestress Drop given Pressure after Immediate Loss Formula