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formula_3_24_25

codes.eurocode.en_1992_1_1_2004.chapter_3_materials.formula_3_24_25

Formula 3.24 from EN 1992-1-1:2004: Chapter 3 - Materials.

Classes:

codes.eurocode.en_1992_1_1_2004.chapter_3_materials.formula_3_24_25.Form3Dot24And25IncreasedCharacteristicCompressiveStrength 

Form3Dot24And25IncreasedCharacteristicCompressiveStrength(
    f_ck: MPA, sigma_2: MPA
)

Bases: Formula

Class representing formula 3.24 and 3.25 for the calculation of the increased characteristic compressive strength due to enclosed concrete.

[\(f_{ck,c}\)] Increased characteristic compressive strength due to enclosed concrete [\(MPa\)].

EN 1992-1-1:2004 art.3.1.9(2) - Formula (3.24 and 3.25)

Parameters:

  • f_ck (MPA) –

    [\(f_{ck}\)] Characteristic compressive strength concrete [\(MPa\)]. Valid range: [\(f_{ck} \leq 90 \, MPa\)].

  • sigma_2 (MPA) –

    [\(\sigma_2\)] Effective compressive stress in transverse direction [\(MPa\)].

Returns:

  • None –
Source code in blueprints/codes/eurocode/en_1992_1_1_2004/chapter_3_materials/formula_3_24_25.py 
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def __init__(
    self,
    f_ck: MPA,
    sigma_2: MPA,
) -> None:
    r"""[$f_{ck,c}$] Increased characteristic compressive strength due to enclosed concrete [$MPa$].

    EN 1992-1-1:2004 art.3.1.9(2) - Formula (3.24 and 3.25)

    Parameters
    ----------
    f_ck : MPA
        [$f_{ck}$] Characteristic compressive strength concrete [$MPa$].
        Valid range: [$f_{ck} \leq 90 \, MPa$].
    sigma_2 : MPA
        [$\sigma_2$] Effective compressive stress in transverse direction [$MPa$].

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

codes.eurocode.en_1992_1_1_2004.chapter_3_materials.formula_3_24_25.Form3Dot24And25IncreasedCharacteristicCompressiveStrength.latex 

latex(n: int = 2) -> LatexFormula

Returns LatexFormula object for formula 3.24 and 3.25.

Source code in blueprints/codes/eurocode/en_1992_1_1_2004/chapter_3_materials/formula_3_24_25.py 
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def latex(self, n: int = 2) -> LatexFormula:
    """Returns LatexFormula object for formula 3.24 and 3.25."""
    if self.sigma_2 <= 0.05 * self.f_ck:
        return LatexFormula(
            return_symbol=r"f_{ck,c}",
            result=f"{self:.{n}f}",
            equation=r"f_{ck} \cdot (1.000 + 5.0 \cdot \sigma_2 / f_{ck})",
            numeric_equation=rf"{self.f_ck:.{n}f} \cdot (1.000 + 5.0 \cdot {self.sigma_2:.{n}f} / {self.f_ck:.{n}f})",
            comparison_operator_label="=",
        )
    return LatexFormula(
        return_symbol=r"f_{ck,c}",
        result=f"{self:.{n}f}",
        equation=r"f_{ck} \cdot (1.125 + 2.5 \cdot \sigma_2 / f_{ck})",
        numeric_equation=rf"{self.f_ck:.{n}f} \cdot (1.125 + 2.5 \cdot {self.sigma_2:.{n}f} / {self.f_ck:.{n}f})",
        comparison_operator_label="=",
    )