Truss#
- Model.element("Truss", tag, nodes, section, density=0)
Create a truss element with tag tag between the nodes in nodes with cross-sectional area section.
- Parameters:
tag – The element tag.
nodes – A tuple of two node tags.
section – The cross-sectional area of the truss element.
density – The mass density of the element.
element truss $eleTag $iNode $jNode $A $matTag
< -rho $rho > < -cMass $cFlag > < -doRayleigh $rFlag >
the other is to specify a Section identifier:
element trussSection $eleTag $iNode $jNode $secTag
< -rho $rho > < -cMass $cFlag > < -doRayleigh $rFlag >
When constructed with a UniaxialMaterial, the truss element considers strain-rate effects, and is thus suitable for use as a damping element.
The valid queries to a truss element when creating an ElementRecorder object are
"axialForce","forces""localForce","deformations","material $args""section $args"
Examples#
Create a truss element with tag 1 added between nodes 1 and 2 with area 5.5 that uses material 1. In the first two variants, a Truss section is defined.
import xara
model = xara.Model(ndm=2, ndf=3)
model.node(1, (0.0, 0.0))
model.node(2, (1.0, 0.0))
model.uniaxialMaterial("Elastic", 1, 29e3)
model.section("Truss", 1, area=5.5, material=1)
model.element("Truss", 1, (1, 2), section=1)
uniaxialMaterial Elastic 1 29e3
section Truss 1 -material 1 -area 5.5
element Truss 1 1 2 -section 1;
element Truss 1 1 2 5.5 1;
Code Developed by: fmk