This page was generated from docs\source\notebooks/concrete_section.ipynb.

Creating a concrete section

from sectionproperties.pre.pre import Material
from sectionproperties.pre.library.concrete_sections import concrete_rectangular_section
from sectionproperties.analysis.section import Section

concrete = Material(
    name="Concrete",
    elastic_modulus=30.1e3,
    poissons_ratio=0.2,
    yield_strength=32,
    density=2.4e-6,
    color="lightgrey",
)
steel = Material(
    name="Steel",
    elastic_modulus=200e3,
    poissons_ratio=0.3,
    yield_strength=500,
    density=7.85e-6,
    color="grey",
)


geom = concrete_rectangular_section(
    b=300,
    d=600,
    dia_top=20,
    n_top=0,
    dia_bot=20,
    n_bot=3,
    n_circle=24,
    cover=30,
    conc_mat=concrete,
    steel_mat=steel,
)

geom.create_mesh(mesh_sizes=2500)
sec = Section(geometry=geom)
sec.plot_mesh()

(area, ixx, iyy, ixy, j, phi) = sec.calculate_frame_properties()
area, ixx, iyy, ixy, j, phi

(5578126977.5534725,
 173057854009309.12,
 41930694232035.7,
 0.03125,
 112167196141418.69,
 0)

geom.geoms

[<sectionproperties.pre.geometry.Geometry at 0x232449fddc0>,
 <sectionproperties.pre.geometry.Geometry at 0x232449fdd90>,
 <sectionproperties.pre.geometry.Geometry at 0x23244a11160>,
 <sectionproperties.pre.geometry.Geometry at 0x2322e2c6a00>]

dir(geom.geoms[1].geom)

['__and__',
 '__bool__',
 '__class__',
 '__delattr__',
 '__dir__',
 '__doc__',
 '__eq__',
 '__format__',
 '__ge__',
 '__geo_interface__',
 '__getattribute__',
 '__gt__',
 '__hash__',
 '__init__',
 '__init_subclass__',
 '__le__',
 '__lt__',
 '__module__',
 '__ne__',
 '__new__',
 '__nonzero__',
 '__or__',
 '__reduce__',
 '__reduce_ex__',
 '__repr__',
 '__setattr__',
 '__setstate__',
 '__sizeof__',
 '__slots__',
 '__str__',
 '__sub__',
 '__subclasshook__',
 '__xor__',
 '_geom',
 '_geom_prepared',
 '_ndim',
 '_repr_svg_',
 'almost_equals',
 'area',
 'boundary',
 'bounds',
 'buffer',
 'centroid',
 'contains',
 'contains_properly',
 'convex_hull',
 'coords',
 'covered_by',
 'covers',
 'crosses',
 'difference',
 'disjoint',
 'distance',
 'dwithin',
 'envelope',
 'equals',
 'equals_exact',
 'exterior',
 'from_bounds',
 'geom_type',
 'geometryType',
 'has_z',
 'hausdorff_distance',
 'interiors',
 'interpolate',
 'intersection',
 'intersects',
 'is_closed',
 'is_empty',
 'is_ring',
 'is_simple',
 'is_valid',
 'length',
 'line_interpolate_point',
 'line_locate_point',
 'minimum_clearance',
 'minimum_rotated_rectangle',
 'normalize',
 'oriented_envelope',
 'overlaps',
 'point_on_surface',
 'project',
 'relate',
 'relate_pattern',
 'representative_point',
 'reverse',
 'segmentize',
 'simplify',
 'svg',
 'symmetric_difference',
 'touches',
 'type',
 'union',
 'within',
 'wkb',
 'wkb_hex',
 'wkt',
 'xy']

type(geom.geoms[1].geom)

shapely.geometry.polygon.Polygon

geom.geoms[1].material

Material(name='Steel', elastic_modulus=200000.0, poissons_ratio=0.3, yield_strength=500, density=7.85e-06, color='grey')

from shapely.geometry import Point

point=Point(0.5, 0.5)

geom.geoms[0].geom.contains(point)

True

geom.geoms[0].create_facets_and_control_points()

geom.geoms[3].facets

[[0, 1],
 [1, 2],
 [2, 3],
 [3, 4],
 [4, 5],
 [5, 6],
 [6, 7],
 [7, 8],
 [8, 9],
 [9, 10],
 [10, 11],
 [11, 12],
 [12, 13],
 [13, 14],
 [14, 15],
 [15, 16],
 [16, 17],
 [17, 18],
 [18, 19],
 [19, 20],
 [20, 21],
 [21, 22],
 [22, 23],
 [23, 0]]

dir(geom.geoms[0])

['__add__',
 '__and__',
 '__class__',
 '__delattr__',
 '__dict__',
 '__dir__',
 '__doc__',
 '__eq__',
 '__format__',
 '__ge__',
 '__getattribute__',
 '__gt__',
 '__hash__',
 '__init__',
 '__init_subclass__',
 '__le__',
 '__lt__',
 '__module__',
 '__ne__',
 '__new__',
 '__or__',
 '__reduce__',
 '__reduce_ex__',
 '__repr__',
 '__setattr__',
 '__sizeof__',
 '__str__',
 '__sub__',
 '__subclasshook__',
 '__weakref__',
 '__xor__',
 '_recovery_points',
 '_repr_svg_',
 'align_center',
 'align_to',
 'assign_control_point',
 'assigned_control_point',
 'calculate_area',
 'calculate_centroid',
 'calculate_extents',
 'calculate_perimeter',
 'compile_geometry',
 'control_points',
 'create_facets_and_control_points',
 'create_mesh',
 'facets',
 'from_3dm',
 'from_dxf',
 'from_points',
 'from_rhino_encoding',
 'geom',
 'holes',
 'material',
 'mirror_section',
 'offset_perimeter',
 'perimeter',
 'plot_geometry',
 'points',
 'recovery_points',
 'rotate_section',
 'shift',
 'shift_points',
 'shift_section',
 'split_section',
 'tol']