concreteproperties.stress_strain_profile.RectangularStressBlock

class RectangularStressBlock(compressive_strength: float, alpha: float, gamma: float, ultimate_strain: float)

Bases: ConcreteUltimateProfile

Class for a rectangular stress block.

Parameters

• compressive_strength (float) – Concrete compressive strength

• alpha (float) – Factor that modifies the concrete compressive strength

• gamma (float) – Factor that modifies the depth of the stress block

• ultimate_strain (float) – Concrete strain at failure

Methods

get_compressive_strength	Returns the most positive stress.
get_elastic_modulus	Returns the elastic modulus of the stress-strain profile.
get_stress	Returns a stress given a strain.
get_tensile_strength	Returns the most negative stress.
get_ultimate_strain	Returns the ultimate strain, or largest compressive strain.
get_unique_strains	Returns an ordered list of unique strains.
plot_stress_strain	Plots the stress-strain profile.
print_properties	Prints the stress-strain profile properties to the terminal.

Attributes

strains
stresses
compressive_strength
alpha
gamma
ultimate_strain

get_stress(strain: float) → float

Returns a stress given a strain.

Overrides parent method with small tolerance to aid ultimate stress generation at nodes.

Parameters

strain (float) – Strain at which to return a stress.

Returns

Stress

Return type

float

get_compressive_strength() → float

Returns the most positive stress.

Returns

Compressive strength

Return type

float

get_elastic_modulus() → float

Returns the elastic modulus of the stress-strain profile.

Returns

Elastic modulus

Return type

float

get_tensile_strength() → float

Returns the most negative stress.

Returns

Tensile strength

Return type

float

get_ultimate_strain() → float

Returns the ultimate strain, or largest compressive strain.

Returns

Ultimate strain

Return type

float

get_unique_strains() → List[float]

Returns an ordered list of unique strains.

Returns

Ordered list of unique strains

plot_stress_strain(title: Optional[str] = 'Stress-Strain Profile', **kwargs) → matplotlib.axes.Axes

Plots the stress-strain profile.

Parameters

• title (Optional[str]) – Plot title

• kwargs – Passed to plotting_context()

Returns

Matplotlib axes object

Return type

matplotlib.axes.Axes

print_properties(fmt: Optional[str] = '8.6e')

Prints the stress-strain profile properties to the terminal.

Parameters

fmt (Optional[str]) – Number format