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Input | Description |
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Elastic Modulus, Eps | Modulus of elasticity of prestressed reinforcement. |
Ultimate Strength, fpu | Ultimate tensile strength of prestressing steel. |
Stress Strain Curve
The prestress stress strain curve uses a modified power formula which can be found in the PCI Journal, Devalapura, R. K., and Tadros, M. K., "Stress-Strain Modeling of 270 ksi Low-Relaxation Prestressing Strands". This equation is calibrated to be used for both 270 ksi and 300 ksi strands.
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Rebar Properties
Input | Description |
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Elastic Modulus, Es | Modulus of elasticity of the rebar. |
Yield Strength, fy | Yield strength of the rebar. |
Transverse Steel Properties
Input | Description | ||
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Elastic Modulus, Es | Modulus of elasticity of the transverse rebar / wire. | ||
Yield Strength, fy | Yield strength of the transverse rebar / wire.
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Prestress Loss Computation
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Input | Description | ||
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Loss | Loss may either be calculated using the equations from AASHTO LRFD Article 5.9.3.3, or may be user defined percentages. | ||
At Release | Initial loss percentage as a function of the jacking stress of the strands.
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At Final | Total loss percentage as a function of the jacking stress of the strands.
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Strand Type | Specifies if the strand is of type low-relaxation or stress-relieved. | ||
Humidity | Relative humidity (percent). |
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