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Concrete01

Description

The Concrete01 material model is a one-dimensional model of concrete stress-strain behavior. In compression, the ascending branch of the backbone is parabolic and there is a linear descending branch after passing the peak compressive strain. The unloading stiffness from the compressive backbone degrades as the maximum compressive strain increases. The model assumes zero stress in tension.

Syntax

ops.uniaxialMaterial('Concrete01',tag,fc,epsc,fcu,epscu)

Parameters

• tag : integer Unique material identifer
• fc : float Peak compressive strength
• epsc : float Strain at which peak strength is reached
• fcu : float Ultimate, crushing strength
• epscu : float Strain at which crusing strength is reached

Optional Parameters

None

Notes

• Parameters can be input as positive or negative and will be converted to the correct sign internally
• In addition to unconfined concrete, the model is suitable for confined concrete by adjusting the strength and strain parameters.

Examples

ops.uniaxialMaterial('Concrete01',1,4.0,0.002,1.0,0.006)

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