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Column (Geometry)

Last modified by Iwona Budny Bjergø on 2022/01/18 12:24

 Column propertyDescription
Modules where available1584955895879-906.png 1584955928375-844.png 1584955941463-434.png
FunctionPoint support in 1584955902697-603.png
 Column in 1584955933208-998.png 1584955956686-720.png
PositionAlways vertical
Cross-sectionArbitrary profile
End connectionArbitrary
MaterialSteel, concrete, timber and general
Load directionArbitrary in 1584955976938-836.png 1584956018782-857.png
Load typeAll point and line load in 1584955983349-282.png 1584956020832-364.png
Available analysis resultsReaction forces in 1584956037035-981.png
 Displacement, internal forces, stresses, stability and vibration shape in 1584956046673-618.png 1584956072486-837.png
Available designSteel design in 1584956052900-501.png 1584956083414-988.png
 RC design in 1584956058908-296.png 1584956093260-679.png (Column punching is available in 1584956109794-738.png)
 Timber design in 1584956063024-875.png 1584956101003-547.png
AlternativeSteel column can be modeled/designed as the set of shells (Shell model)
Default Short CommandCL

Table: Column properties

Definition steps

  1. If needed (and available in the current FEM-Design module), set a proper position for the working plane.
  2. Start 1584956129924-536.png Column command from 1584956136104-178.png tabmenu and choose 1584956142407-651.png Define.
  3. Set the properties of the new column at 1584956180648-952.png Default settings:

    • Identifier (General)
      The program automatically generates it, but you can define custom value. Identifier (ID and Position) number can be displayed in model view (Display settings).
    • Allow uplift (General)
      Available in 1584956219931-810.png  only. “Uplift” behavior can be modeled by activating this option. It works in case of tensional reaction force.
      light.pngIn 3D modules, “uplift” can be modeled with non-linear Point support settings.
    • Section
      Choose a column profile from the Section library or define a new cross-section by parameters. The applied section name can be displayed in model view (Display settings).

    • End conditions
      In 1584956509537-572.png, the support conditions (General) of the top and bottom ends can be set to fully rigid or fully hinged. Because Columns are point supports further point support is not needed to define at Column end.
      In 3D modules, the end connections can be set under the End conditions tab. Only the released motion (arrow) and rotation (two-headed arrow) components are displayed in the model view (Display settings). End connections can be fully customised for bar ends by setting the rigidity of the displacement components.
      The component directions are valid in the beam’s local co-ordinate system.
      Inactive component means a fixed motion/rotation, while a checked component behaves according to the user-specified rigidity value.
      With the „Rigid” and the „Hinged” buttons pre-defined end condition values can be applyed to the bar ends.
      Eccentricity of analytical model (End conditions)
      In 3D modules, eccentricity of the analytical model can be set in the End conditions tab similarly to Beams. The default position (center of gravity) of the column axis (local x’ axis) can be set in the aspect of analysis/design calculation.

    • Physical model
      Eccentricity of the physical model can be set in the Physical model tab, in a similar way as the Eccentricity of analytical model for Beams. It has no effect on the calculation.

    • Material
      Any type of materials can be set for column Analysis, but design can be run for concrete, steel and timber columns only. The applied material name can be displayed in model view (Display settings).

  4. Define the direction of the cross-section y’ axis.
  5. Choose a method for insertion point definition (geometry).
  6. Place the column in the model view based on the chosen geometry method.

Optional steps:

  1. Modify the bar properties with the 1584956616330-462.png Properties tool of the Column tool palette.
  2. Set the display settings of columns at Settings > All > Display > Beam, Column and Truss similarly to Beams.
  3. The columns are stored on “Columns” Object layers. At layer settings, the default color and pen width can be set for all columns. The color and pen width settings by selected column elements can be modified by Edit > Properties > Change appearance.
  4. In 1584956627906-208.png Plate module, the 1584956635463-921.png  Info tool displays the support stiffness (motion and rotation) values of the column ends valid in the column local co-ordinate system.
    Figure: Support stiffness of Columns in Plate module
  5. To simulate camber of the elements check the box next to Camber simulation by prestressing in the Default setting/General tab.
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