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Using reaction forces and UDLs in AutoDefaults and AutoConnection

Added August 31, 2016 by Tekla User Assistance tekla.documentation@trimble.com

Software version: 
2016i

Using reaction forces and UDLs in AutoDefaults and AutoConnection

Using reaction forces and UDLs in AutoDefaults and AutoConnection

You can set reaction forces for AutoConnectiontool that creates connections with predefined properties in certain framing conditions

and AutoDefaultspredefined properties that AutoConnection uses when creating connections

in the user-defined attributes of a part, and for AutoDefaults also on the Design tab in the connection dialog box.

Reaction forces

When you use reaction forces in a rule and AutoDefaults is activated, Tekla Structures first searches for reaction forces in the corresponding connection’s properties. If the properties do not contain reaction forces, Tekla Structures searches the user-defined attributes of the secondary part(1) part that exists in a building object and that is connected to the main part

(1) Secondary part can be an assembly secondary part or a cast unit secondary part.

(2) input part that the user selects after selecting the component main part when creating a component

(2) A component can have none, one or more component secondary parts.

of the connection. If Tekla Structures does not find forces there, you cannot use reaction force rules.

Shear force calculation

If you have not given any reaction force values, shear force is calculated using the UDL (uniformly distributed load) shear force routine. The UDL calculation is mainly intended for use with imperial units. It uses the yield stress value, profile dimensions, and UDL percentage to calculate the maximum shear force allowed.

  • Yield stress is defined in the material catalogcatalog that displays material grades and information on them

    By default, the material catalog contains standard, environment-specific materials. The user can add, modify, and delete material grades.

    .
  • Profile dimensions come from the profile catalogcatalog that displays profiles and information on the profiles

    In addition to the available profiles in the respective Tekla Structures environment, the user can add fixed or parametric user-defined profiles to the profile catalog. It is also possible to import profiles to the profile catalog.

    .
  • UDL percentage is taken either from the connection dialog box or from an advanced option.

Tekla Structures compares the result with the shear force rule in AutoDefaults.

To use UDLs for AutoConnection and AutoDefaults:

To Do this
Use UDL for AutoConnection
  1. On the Design tab in the connection dialog box, set the UDL option to Yes.
  2. Enter the UDL percentage in the UDL% box.

    If you do not enter any value, Tekla Structures uses a default percentage set with the XS_AUTODEFAULT_UDL_PERCENT advanced option.

Use UDL for AutoDefaults
  1. On the Design tab in the connection dialog box, set the Use UDL option to Yes.
  2. Enter the UDL percentage in the UDL % box.

    If you do not enter any value, Tekla Structures uses a default percentage set using the XS_AUTODEFAULT_UDL_PERCENT advanced option.

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