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formula_3_26

codes.eurocode.en_1992_1_1_2004.chapter_3_materials.formula_3_26

Formula 3.26 from EN 1992-1-1:2004: Chapter 3 - Materials.

Classes:

codes.eurocode.en_1992_1_1_2004.chapter_3_materials.formula_3_26.Form3Dot26IncreasedStrainAtMaxStrength 

Form3Dot26IncreasedStrainAtMaxStrength(
    f_ck: MPA, f_ck_c: MPA, epsilon_c2: DIMENSIONLESS
)

Bases: Formula

Class representing formula 3.26 for the calculation of the increased strain at the maximum strength due to enclosed concrete.

[\(\epsilon_{c2,c}\)] Increased strain at the maximum strength due to enclosed concrete. [\(-\)].

EN 1992-1-1:2004 art.3.1.9(2) - Formula (3.26)

Parameters:

  • f_ck (MPA) –

    [\(f_{ck}\)] Characteristic compressive strength [\(MPa\)]

  • f_ck_c (MPA) –

    [\(f_{ck,c}\)] Increased characteristic compressive strength due to enclosed concrete [\(MPa\)]. See classes Form3Dot24IncreasedCharacteristicCompressiveStrength and/or Form3Dot25IncreasedCharacteristicCompressiveStrength

  • epsilon_c2 (DIMENSIONLESS) –

    [\(\epsilon_{c2}\)] Strain at maximum strength [\(-\)]

Returns:

  • None –
Source code in blueprints/codes/eurocode/en_1992_1_1_2004/chapter_3_materials/formula_3_26.py 
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def __init__(
    self,
    f_ck: MPA,
    f_ck_c: MPA,
    epsilon_c2: DIMENSIONLESS,
) -> None:
    r"""[$\epsilon_{c2,c}$] Increased strain at the maximum strength due to enclosed concrete. [$-$].

    EN 1992-1-1:2004 art.3.1.9(2) - Formula (3.26)

    Parameters
    ----------
    f_ck : MPA
        [$f_{ck}$] Characteristic compressive strength [$MPa$]
    f_ck_c : MPA
        [$f_{ck,c}$] Increased characteristic compressive strength due to enclosed concrete [$MPa$].
        See classes Form3Dot24IncreasedCharacteristicCompressiveStrength and/or Form3Dot25IncreasedCharacteristicCompressiveStrength
    epsilon_c2 : DIMENSIONLESS
        [$\epsilon_{c2}$] Strain at maximum strength [$-$]

    Returns
    -------
    None
    """
    super().__init__()
    self.f_ck = f_ck
    self.f_ck_c = f_ck_c
    self.epsilon_c2 = epsilon_c2

codes.eurocode.en_1992_1_1_2004.chapter_3_materials.formula_3_26.Form3Dot26IncreasedStrainAtMaxStrength.latex 

latex(n: int = 3) -> LatexFormula

Returns LatexFormula object for formula 3.26.

Source code in blueprints/codes/eurocode/en_1992_1_1_2004/chapter_3_materials/formula_3_26.py 
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def latex(self, n: int = 3) -> LatexFormula:
    """Returns LatexFormula object for formula 3.26."""
    return LatexFormula(
        return_symbol=r"\epsilon_{c2,c}",
        result=f"{self:.{n}f}",
        equation=r"\epsilon_{c2} \cdot ( f_{ck,c} / f_{ck} )^2",
        numeric_equation=rf"{self.epsilon_c2:.{n}f} \cdot ( {self.f_ck_c:.{n}f} / {self.f_ck:.{n}f} )^2",
        comparison_operator_label="=",
    )