concreteproperties.design_codes.AS3600#

class AS3600[source]#

Bases: DesignCode

Design code class for Australian standard AS 3600:2018.

Inits the AS3600 class.

Methods

`assign_concrete_section`	Assigns a concrete section to the design code.
`biaxial_bending_diagram`	Generates a biaxial bending with capacity factors to AS 3600:2018.
`calculate_cracked_properties`	Calculates cracked section properties.
`calculate_cracked_stress`	Calculates stresses within the reinforced concrete section assuming a cracked section.
`calculate_service_stress`	Calculates service stresses within the reinforced concrete section.
`calculate_ultimate_stress`	Calculates ultimate stresses within the reinforced concrete section.
`calculate_uncracked_stress`	Calculates stresses within the reinforced concrete section assuming an uncracked section.
`capacity_reduction_factor`	Returns the AS 3600:2018 capacity reduction factor (Table 2.2.2).
`create_concrete_material`	Returns a concrete material object to AS 3600:2018.
`create_steel_material`	Returns a steel material object.
`get_gross_properties`	Returns the gross section properties of the reinforced concrete section.
`get_k_uo`	Returns k_uo for the reinforced concrete cross-section given `theta`.
`get_n_ub`	Returns n_ub for the reinforced concrete cross-section given `theta`.
`get_transformed_gross_properties`	Transforms gross section properties.
`moment_curvature_analysis`	Performs a moment curvature analysis.
`moment_interaction_diagram`	Generates a moment interaction diagram with capacity factors to AS 3600:2018.
`ultimate_bending_capacity`	Calculates the ultimate bending capacity with capacity factors to AS 3600:2018.

assign_concrete_section(concrete_section: ConcreteSection)[source]#

Assigns a concrete section to the design code.

Parameters: concrete_section (ConcreteSection) – Concrete section object to analyse

create_concrete_material(compressive_strength: float, colour: Optional[str] = 'lightgrey') → Concrete[source]#

Returns a concrete material object to AS 3600:2018.

Material assumptions:
- Density: 2400 kg/m3
- Elastic modulus: Interpolated from Table 3.1.2
- Service stress-strain profile: Linear with no tension, compressive strength
at 0.9 * f’c
- Ultimate stress-strain profile: Rectangular stress block, parameters from
Cl. 8.1.3
- Alpha squash: From Cl. 10.6.2.2
- Flexural tensile strength: From Cl. 3.1.1.3

Parameters

compressive_strength (float) – Characteristic compressive strength of concrete at 28 days in megapascals (MPa)
colour (Optional[str]) – Colour of the concrete for rendering

Raises

ValueError – If compressive_strength is not between 20 MPa and 100 MPa.

Returns

Concrete material object

Return type

Concrete

create_steel_material(yield_strength: Optional[float] = 500, ductility_class: Optional[str] = 'N', colour: Optional[str] = 'grey') → Steel[source]#

Returns a steel material object.

Material assumptions:
- Density: 7850 kg/m3
- Elastic modulus: 200,000 MPa
- Stress-strain profile: Elastic-plastic, fracture strain from Table 3.2.1

Parameters

yield_strength (Optional[float]) – Steel yield strength
ductility_class (Optional[str]) – Steel ductility class (“N” or “L”)
colour (Optional[str]) – Colour of the steel for rendering

Raises

ValueError – If ductility_class is not N or L

Returns

Steel material object

Return type

Steel

capacity_reduction_factor(n_u: float, n_ub: float, n_uot: float, k_uo: float, phi_0: float) → float[source]#

Returns the AS 3600:2018 capacity reduction factor (Table 2.2.2).

n_ub and phi_0 only required for compression, n_uot only required for tension.

Parameters

n_u (float) – Axial force in member
n_ub (float) – Axial force at balanced point
n_uot (float) – Axial force at ultimate tension load
k_uo (float) – Neutral axis parameter at pure bending
phi_0 (float) – Capacity reduction factor for dominant compression

Returns

Capacity reduction factor

Return type

float

get_k_uo(theta: float) → float[source]#

Returns k_uo for the reinforced concrete cross-section given theta.

Parameters: theta (float) – Angle (in radians) the neutral axis makes with the horizontal axis (\(-\pi \leq \theta \leq \pi\))
Returns: Bending parameter k_uo
Return type: float

get_n_ub(theta: float) → float[source]#

Returns n_ub for the reinforced concrete cross-section given theta.

Parameters: theta (float) – Angle (in radians) the neutral axis makes with the horizontal axis (\(-\pi \leq \theta \leq \pi\))
Returns: Balanced axial force n_ub
Return type: float

ultimate_bending_capacity(theta: Optional[float] = 0, n: Optional[float] = 0, phi_0: Optional[float] = 0.6) → Tuple[res.UltimateBendingResults, res.UltimateBendingResults, float][source]#

Calculates the ultimate bending capacity with capacity factors to AS 3600:2018.

Parameters

theta (Optional[float]) – Angle (in radians) the neutral axis makes with the horizontal axis (\(-\pi \leq \theta \leq \pi\))
n (Optional[float]) – Net axial force
phi_0 (Optional[float]) – Compression dominant capacity reduction factor, see Table 2.2.2(d)

Returns

Factored and unfactored ultimate bending results objects, and capacity reduction factor (factored_results, unfactored_results, phi)

Return type

Tuple[UltimateBendingResults, UltimateBendingResults, float]

moment_interaction_diagram(phi_0: Optional[float] = 0.6, **kwargs) → Tuple[res.MomentInteractionResults, res.MomentInteractionResults, List[float]][source]#

Generates a moment interaction diagram with capacity factors to AS 3600:2018.

Parameters

phi_0 (Optional[float]) – Compression dominant capacity reduction factor, see Table 2.2.2(d)
kwargs – Keyword arguments passed to moment_interaction_diagram()

Returns

Factored and unfactored moment interaction results objects, and list of capacity reduction factors (factored_results, unfactored_results, phis)

Return type

Tuple[MomentInteractionResults, MomentInteractionResults, List[float]]

biaxial_bending_diagram(n: Optional[float] = 0, n_points: Optional[int] = 48, phi_0: Optional[float] = 0.6) → Tuple[res.BiaxialBendingResults, List[float]][source]#

Generates a biaxial bending with capacity factors to AS 3600:2018.

Parameters

n (Optional[float]) – Net axial force
n_points (Optional[int]) – Number of calculation points between the decompression
phi_0 (Optional[float]) – Compression dominant capacity reduction factor, see Table 2.2.2(d)

Returns

Factored biaxial bending results object and list of capacity reduction factors (factored_results, phis)

Return type

Tuple[BiaxialBendingResults, List[float]]

calculate_cracked_properties(**kwargs) → CrackedResults#

Calculates cracked section properties.

Parameters: kwargs – Keyword arguments passed to calculate_cracked_properties()
Returns: Cracked results object
Return type: CrackedResults

calculate_cracked_stress(**kwargs) → StressResult#

Calculates stresses within the reinforced concrete section assuming a cracked section.

Parameters: kwargs – Keyword arguments passed to calculate_cracked_stress()
Returns: Stress results object
Return type: StressResult

calculate_service_stress(**kwargs) → StressResult#

Calculates service stresses within the reinforced concrete section.

Parameters: kwargs – Keyword arguments passed to calculate_service_stress()
Returns: Stress results object
Return type: StressResult

calculate_ultimate_stress(**kwargs) → StressResult#

Calculates ultimate stresses within the reinforced concrete section.

Parameters: kwargs – Keyword arguments passed to calculate_ultimate_stress()
Returns: Stress results object
Return type: StressResult

calculate_uncracked_stress(**kwargs) → StressResult#

Calculates stresses within the reinforced concrete section assuming an uncracked section.

Parameters: kwargs – Keyword arguments passed to calculate_uncracked_stress()
Returns: Stress results object
Return type: StressResult

get_gross_properties(**kwargs) → ConcreteProperties#

Returns the gross section properties of the reinforced concrete section.

Parameters: kwargs – Keyword arguments passed to get_gross_properties()
Returns: Concrete properties object
Return type: ConcreteProperties

get_transformed_gross_properties(**kwargs) → TransformedConcreteProperties#

Transforms gross section properties.

Parameters: kwargs – Keyword arguments passed to get_transformed_gross_properties()
Returns: Transformed concrete properties object
Return type: TransformedConcreteProperties

moment_curvature_analysis(**kwargs) → MomentCurvatureResults#

Performs a moment curvature analysis. No reduction factors are applied to the moments.

Parameters: kwargs – Keyword arguments passed to moment_curvature_analysis()
Returns: Moment curvature results object
Return type: MomentCurvatureResults