cee_wall

sectionproperties.pre.library.concrete_sections.cee_wall(d: float, b: float, t_f: float, t_w: float, dia_bar: float, area_bar: float, spacing: float, cover: float, double: bool = True, n_circle: int = 4, conc_mat: Material = Material(name='default', elastic_modulus=1, poissons_ratio=0, yield_strength=1, density=1, color='w'), steel_mat: Material = Material(name='default', elastic_modulus=1, poissons_ratio=0, yield_strength=1, density=1, color='w')) → CompoundGeometry[source]

Constructs a reinforced concrete cee-shaped wall section.

Constructs a reinforced concrete cee-shaped wall section of depth d, width b, flange thickness t_f and web thickness t_w. The wall reinforcement has a maximum spacing of spacing and is doubly reinforced if double is set to True, or singly reinforced if it is set to False.

Note

As the reinforcing bars are described by discretised circles, the area of each bar is required to ensure that the correct reinforcing area is provided.

Parameters:

  • d (float) – Concrete wall depth

  • b (float) – Concrete wall width

  • t_f (float) – Concrete wall flange thickness

  • t_w (float) – Concrete wall web thickness

  • dia_bar (float) – Diameter of the reinforcing bars, used for calculating bar placement

  • area_bar (float) – Area of the reinforcing bars

  • spacing (float) – Maximum spacing of the reinforcement bars, the calculated spacing is equal to ceil(extent / spacing) + 1

  • cover (float) – Clear cover to the reinforcing bars

  • double (bool) – If set to True, provides two layers of reinforcement to the wall. If set to False, provides a single central layer of reinforcement to the wall. Defaults to True.

  • n_circle (int) – Number of points used to discretise the circular reinforcing bars. Defaults to 4.

  • conc_mat (Material) – Material object to assign to the concrete area. Defaults to pre.DEFAULT_MATERIAL.

  • steel_mat (Material) – Material object to assign to the steel area. Defaults to pre.DEFAULT_MATERIAL.

Raises:

ValueError – Geometry generation failed

Returns:

Reinforced concrete cee-shaped wall section geometry

Return type:

CompoundGeometry

Example

The following example creates a 2000 mm deep x 1500 mm wide cee-shaped concrete wall, with a 200 mm thick flange and 150 mm thick web. The wall is reinforced with a double layer of N16-150 with 30 mm cover. A coarse finite element mesh is generated to show the different material regions:

from sectionproperties.pre import Material
from sectionproperties.pre.library import cee_wall
from sectionproperties.analysis 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 = cee_wall(
    d=2000,
    b=1500,
    t_f=200,
    t_w=150,
    dia_bar=16,
    area_bar=200,
    spacing=150,
    cover=30,
    double=True,
    n_circle=12,
    conc_mat=concrete,
    steel_mat=steel,
)

geom.create_mesh(mesh_sizes=[0])  # a size of zero creates a coarse mesh
Section(geometry=geom).plot_mesh()

(Source code, png, hires.png, pdf)

../_images/sectionproperties-pre-library-concrete_sections-cee_wall-1.png

Reinforced concrete cee-shaped wall section geometry