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formula_3_21_22

codes.eurocode.en_1992_1_1_2004.chapter_3_materials.formula_3_21_22

Formula 3.21 and 3.22 from EN 1992-1-1:2004: Chapter 3 - Materials.

Classes:

  • Form3Dot21And22EffectiveStrength –

    [\(\eta\)] Class representing formula 3.21 and 3.22 for the calculation of the factor for the effective strength [\(-\)].

codes.eurocode.en_1992_1_1_2004.chapter_3_materials.formula_3_21_22.Form3Dot21And22EffectiveStrength 

Form3Dot21And22EffectiveStrength(f_ck: MPA)

Bases: Formula

[\(\eta\)] Class representing formula 3.21 and 3.22 for the calculation of the factor for the effective strength [\(-\)].

[\(\eta\)] Factor effective strength [\(-\)].

EN 1992-1-1:2004 art.3.1.7(3) - Formula (3.21) and (3.22)

Parameters:

  • f_ck (MPA) –

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

Returns:

  • None –
Source code in blueprints/codes/eurocode/en_1992_1_1_2004/chapter_3_materials/formula_3_21_22.py 
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def __init__(
    self,
    f_ck: MPA,
) -> None:
    r"""[$\eta$] Factor effective strength [$-$].

    EN 1992-1-1:2004 art.3.1.7(3) - Formula (3.21) and (3.22)

    Parameters
    ----------
    f_ck : MPA
        [$f_{ck}$] Characteristic compressive strength concrete [$MPa$].
        Valid range: [$f_{ck} \leq 90 MPa$].

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

codes.eurocode.en_1992_1_1_2004.chapter_3_materials.formula_3_21_22.Form3Dot21And22EffectiveStrength.latex 

latex(n: int = 3) -> LatexFormula

Returns LatexFormula object for formula 3.21 and 3.22.

Source code in blueprints/codes/eurocode/en_1992_1_1_2004/chapter_3_materials/formula_3_21_22.py 
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def latex(self, n: int = 3) -> LatexFormula:
    r"""Returns LatexFormula object for formula 3.21 and 3.22."""
    return LatexFormula(
        return_symbol=r"\eta",
        result=f"{self:.{n}f}",
        equation=r"1.0" if self.f_ck <= 50 else r"1.0 - (f_{ck} - 50) / 200",
        numeric_equation=r"1.0" if self.f_ck <= 50 else rf"1.0 - ({self.f_ck:.{n}f} - 50) / 200",
        comparison_operator_label="=",
    )