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formula_3_27

codes.eurocode.en_1992_1_1_2004.chapter_3_materials.formula_3_27

Formula 3.27 from EN 1992-1-1:2004: Chapter 3 - Materials.

Classes:

codes.eurocode.en_1992_1_1_2004.chapter_3_materials.formula_3_27.Form3Dot27IncreasedStrainLimitValue 

Form3Dot27IncreasedStrainLimitValue(
    f_ck: MPA, sigma_2: MPA, epsilon_cu2: DIMENSIONLESS
)

Bases: Formula

Class representing formula 3.27 for the calculation of the increased strain limit value due to enclosed concrete.

[\(\epsilon_{cu2,c}\)] Increased strain limit value due to enclosed concrete. [\(-\)].

EN 1992-1-1:2004 art.3.1.9(2) - Formula (3.27)

Parameters:

  • f_ck (MPA) –

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

  • sigma_2 (MPA) –

    [\(\sigma_{2}\)] Effective compressive stress in transverse direction [\(MPa\)]

  • epsilon_cu2 (DIMENSIONLESS) –

    [\(\epsilon_{cu2}\)] Strain limit value [\(-\)]

Returns:

  • None –
Source code in blueprints/codes/eurocode/en_1992_1_1_2004/chapter_3_materials/formula_3_27.py 
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def __init__(
    self,
    f_ck: MPA,
    sigma_2: MPA,
    epsilon_cu2: DIMENSIONLESS,
) -> None:
    r"""[$\epsilon_{cu2,c}$] Increased strain limit value due to enclosed concrete. [$-$].

    EN 1992-1-1:2004 art.3.1.9(2) - Formula (3.27)

    Parameters
    ----------
    f_ck : MPA
        [$f_{ck}$] Characteristic compressive strength [$MPa$]
    sigma_2 : MPA
        [$\sigma_{2}$] Effective compressive stress in transverse direction [$MPa$]
    epsilon_cu2 : DIMENSIONLESS
        [$\epsilon_{cu2}$] Strain limit value [$-$]

    Returns
    -------
    None
    """
    super().__init__()
    self.f_ck = f_ck
    self.sigma_2 = sigma_2
    self.epsilon_cu2 = epsilon_cu2

codes.eurocode.en_1992_1_1_2004.chapter_3_materials.formula_3_27.Form3Dot27IncreasedStrainLimitValue.latex 

latex(n: int = 3) -> LatexFormula

Returns LatexFormula object for formula 3.27.

Source code in blueprints/codes/eurocode/en_1992_1_1_2004/chapter_3_materials/formula_3_27.py 
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def latex(self, n: int = 3) -> LatexFormula:
    """Returns LatexFormula object for formula 3.27."""
    return LatexFormula(
        return_symbol=r"\epsilon_{cu2,c}",
        result=f"{self:.{n}f}",
        equation=r"\epsilon_{cu2} + 0.2 \cdot \sigma_2 / f_{ck}",
        numeric_equation=rf"{self.epsilon_cu2:.{n}f} + 0.2 \cdot {self.sigma_2:.{n}f} / {self.f_ck:.{n}f}",
        comparison_operator_label="=",
    )