xsection.CompositeSection#

../../_images/composite-tee.png — A composite T-section with steel reinforcement.#

class xsection.CompositeSection(patches, **kwds)#

A non-homogeneous cross-section composed from multiple sections.

Parameters#

patches: list[Section]: A list of sections to combine into a composite section.
material: Material, optional: A default material to assign to patches without a material.

__init__(patches, **kwds)#

Methods

`__init__`(patches, **kwds)
`add_patch`(patch)
`add_patches`(patch)
`create_fibers`([origin, center, types, warp, ...])	use material to force a homogeneous material
`exterior`()
`integrate`(f)
`interior`()
`linspace`(start, stop, num[, endpoint, center])	Create `num` copies of this section with centroids linearly aranged from `start` to `stop`.
`rotate`([angle, principal])
`summary`([shear])
`torsion_warping`()
`translate`(offset)

Attributes

`centroid`
`elastic`
`patches`

Example#

import veux
from xsection import CompositeSection
from xsection.library import Rectangle, Circle
from xara.units import iks

d   = 18*iks.inch
b   = 20*iks.inch
t   =  6*iks.inch
cv  =  2*iks.inch
bar = Circle(0.4, z=2, mesh_scale=1, divisions=10)

c = CompositeSection([
      Rectangle(t,d),
      Rectangle(b,t).translate([0, -d/2-t/2]),
      *bar.linspace([-(b/2-cv), -d/2-t/1.5], [b/2-cv, -d/2-t/1.5], 4, z=2)
   ])

m = c.model
artist = veux.create_artist(c.model)
artist.draw_surfaces()
artist.draw_outlines()
veux.serve(artist)

units = CreateUnits();

xs = py.importlib.import_module('xsection');
xl = py.importlib.import_module('xsection.library');

d     = 18*xs.units.inch;
b     = 20*xs.units.inch;
t     =  6*xs.units.inch;
cover =  2*xs.units.inch;

flange = xl.Rectangle(t, d);
web    = xl.Rectangle(b, t).translate({0, -d/2-t/2});

section = xs.CompositeSection({flange, web});

% Combine into one shape
section = xs.CompositeSection({web, flange});

%
% Add reinforcement
%

% Create a shape to replicate. The parameter z=2 will ensure
% this material takes priority over the concrete of the rectangular flange
bar = xs.library.Circle(0.4, z=2, mesh_scale=1, divisions=int32(10));

ri  = {-(b/2-cover), -d/2-t/1.5};
rj  = {  b/2-cover , -d/2-t/1.5};
top_bars = bar.linspace(ri, rj, int32(4));

section.add_patches(top_bars);

section = section.translate(section.centroid);

%
% Visualization
%
artist = veux.create_artist(section.model);
artist.draw_outlines();
artist.draw_surfaces(); %field=section.torsion_warping()
artist.save("tee.glb");
% veux.serve(artist);
surfaceMeshShow(readSurfaceMesh("tee.glb"));