m_n_kappa.crosssection.ComputationCrosssection#

class m_n_kappa.crosssection.ComputationCrosssection(sections=None, slab_effective_width=None)#

Bases: Crosssection

Base for computed cross-sections

This class is initialized by the classes that inherit from it.

See also

ComputationCrosssectionStrain: cross-section that is loaded only by axial-forces
ComputationCrosssectionCurvature: cross-section computing curvatures

Methods

`add_section`(section)	add a `Section` to this cross-section
`concrete_slab_width`()	full width of the concrete slab
`decisive_maximum_negative_strain_position`()	minimum of all maximum negative strains
`decisive_maximum_positive_strain_position`()	minimum of all maximum positive strains
`get_boundary_conditions`()	curvature boundary values under positive and negative curvature
`get_sub_cross_sections`()	get cross-section split into slab- and girder-sections (the sub-cross-sections)
`girder_sections_axial_force`()	summarized axial force of the girder sections
`girder_sections_moment`()	summarized moment of the girder sections
`left_edge`()	outer left-edge of the concrete-slab
`maximum_negative_strain`()	determine maximum positive strain of all sections associated with this cross-section
`maximum_positive_strain`()	determine maximum positive strain of all sections associated with this cross-section
`right_edge`()	outer right-edge of the concrete-slab
`sections_not_of_type`(section_type)	get a list of sections that are not of the specified typ
`sections_of_type`(section_type)	get a list of sections that are of the specified type associated with this cross-section
`slab_sections_axial_force`()	summarized axial forces of the slab sections
`slab_sections_moment`()	summarized moments of the slab sections
`strain_positions`([strain_1, strain_2, ...])	get all `StrainPosition`-values between `strain_1` and `strain_2`
`total_axial_force`()	summarized axial forces of the cross_section
`total_moment`()	summarized moments of the cross_section

Attributes

`bottom_edge`	overall vertical position of the bottom edge of the cross-section \(z_\mathrm{bottom}\)
`compute_sections`	`Section` in `sections` transformed into `ComputationSection`
`compute_split_sections`	split computation sections
`computed_girder_sections`	sections of the girder (computed)
`computed_slab_sections`	sections of the slab (computed)
`girder_sections`	`Section` belonging to te girder
`half_point`	vertical middle between and bottom
`height`	height of the cross-section
`section_type`	section-type this cross-section is associated with, if it is only one
`sections`	all sections associated with this cross-section
`slab_effective_width`	effective widths of the (concrete) slab
`slab_sections`	all slab-sections of this cross-section
`top_edge`	top-edge of the cross-section \(z_\mathrm{top}\)

Parameters:

sections (list[m_n_kappa.section.Section] | m_n_kappa.crosssection.Crosssection) –
slab_effective_width (EffectiveWidths) –

add_section(section)#

add a Section to this cross-section

Parameters:: section (Section) – section to add to this cross-section
Return type:: None
Raises:: ValueError – if section is not of type Section

concrete_slab_width()#

full width of the concrete slab

Return type:: float

decisive_maximum_negative_strain_position()#

minimum of all maximum negative strains

New in version 0.2.0.

Return type:: StrainPosition

decisive_maximum_positive_strain_position()#

minimum of all maximum positive strains

New in version 0.2.0.

Return type:: StrainPosition

get_boundary_conditions()#

curvature boundary values under positive and negative curvature

Returns:: curvature boundary values under positive and negative curvature
Return type:: Boundaries

See also

get_boundaries()

get_sub_cross_sections()#

get cross-section split into slab- and girder-sections (the sub-cross-sections)

New in version 0.2.0.

Return type:: tuple

girder_sections_axial_force()#

summarized axial force of the girder sections

Return type:: float

girder_sections_moment()#

summarized moment of the girder sections

Return type:: float

left_edge()#

outer left-edge of the concrete-slab

Warning

will fail in case concrete is a trapezoid or a circle

Return type:: float

maximum_negative_strain()#

determine maximum positive strain of all sections associated with this cross-section

Return type:: float

maximum_positive_strain()#

determine maximum positive strain of all sections associated with this cross-section

Return type:: float

right_edge()#

outer right-edge of the concrete-slab

Warning

will fail in case concrete is a trapezoid or a circle

Return type:: float

sections_not_of_type(section_type)#

get a list of sections that are not of the specified typ

Parameters:

section_type (str) –

type of section to search for. Possible section-types are:

'slab' -> concrete slab + reinforcement
'girder' -> Steel girder

Returns:

sections of the specified type associated with this cross-section

Return type:

list[Section]

sections_of_type(section_type)#

get a list of sections that are of the specified type associated with this cross-section

Associated sections are listed in property sections. Therefore, these sections must have been added before to this cross-section.

Parameters:

section_type (str) –

type of section to search for. Possible section-types are:

'slab' -> concrete slab + reinforcement
'girder' -> Steel girder

Returns:

sections of the specified type associated with this cross-section

Return type:

list[Section]

slab_sections_axial_force()#

summarized axial forces of the slab sections

Return type:: float

slab_sections_moment()#

summarized moments of the slab sections

Return type:: float

strain_positions(strain_1=None, strain_2=None, include_strains=False)#

get all StrainPosition-values between strain_1 and strain_2

In case strain_1=None and strain_2=None all possible values will be given.

Parameters:

strain_1 (float) – first strain-value (Default: None)
strain_2 (float) – second strain-value (Default: None)
include_strains (bool) – includes the boundary strain values (Default: False)

Returns:

m_n_kappa.StrainPosition’s with strains between the given strains

Return type:

list[m_n_kappa.StrainPosition]

total_axial_force()#

summarized axial forces of the cross_section

Return type:: float

total_moment()#

summarized moments of the cross_section

Return type:: float

property bottom_edge: float#: overall vertical position of the bottom edge of the cross-section \(z_\mathrm{bottom}\)

property compute_sections: list[m_n_kappa.section.ComputationSection]#: Section in sections transformed into ComputationSection

property compute_split_sections: list[m_n_kappa.section.ComputationSection]#: split computation sections

property computed_girder_sections: list#: sections of the girder (computed)

property computed_slab_sections: list#: sections of the slab (computed)

property girder_sections: list[m_n_kappa.section.Section]#: Section belonging to te girder

property half_point: float#: vertical middle between and bottom

property height: float#: height of the cross-section

property section_type: str#: section-type this cross-section is associated with, if it is only one

property sections: list[m_n_kappa.section.Section]#: all sections associated with this cross-section

property slab_effective_width: EffectiveWidths#: effective widths of the (concrete) slab

property slab_sections: list[m_n_kappa.section.Section]#: all slab-sections of this cross-section

property top_edge: float#: top-edge of the cross-section \(z_\mathrm{top}\)