New Lateral Force Resisting System Wall Type - Shear Only Wall

Added June 12, 2020 by Tekla User Assistance tekla.documentation@trimble.com

Software version: 
Tekla Structural Designer 2020

New Lateral Force Resisting System Wall Type - Shear Only Wall

New Lateral Force Resisting System Wall Type - Shear Only Wall

Tekla Structural Designer 2020 introduces a new type of Wall for modeling for example a lateral system of infill masonry panels.

Typically engineers wish to model these as having only in-plane lateral stiffness of a defined value, and zero vertical and out of plane stiffness. The new wall object automatically models this idealized behaviour with a sophisticated underlying analysis model involving axial spring elements and constraints. The new wall type can be used in models with both rigid and semi-rigid diaphragms.

  • Shear Only Walls are added via a new button command on the Model Ribbon in the Walls and Panels group. A single wall object of the full building height can be placed within a bay and will automatically be divided into panels for each level.

    • Requirements for these walls are that they must be; within a single bay (i.e. do not overlap one or more columns); strictly rectangular; vertical and surrounded by columns and beams (other than at the bottom edge).

  • For existing walls the Wall Type can also be reviewed and edited via the Properties Window as shown in the picture below.

  • The material and thickness of the wall can be set, but note that these control only the wall self weight, not its stiffness. The latter is specified directly by the engineer.

  • Shear Only wall results are available both graphically and numerically and give the total value of shear in each panel of the wall and the reaction and the wall base. These can be reviewed:

    • In the Results View via 1D Results > Shear Wall forces (in 1D Results group) for the panel forces and the base reactions via Reactions (Fy controlled by the [2D] reactions toggle button).

    • in Analyze > Tabular Data > Shear Only Walls and in Reports via the associated Report item.

  • The new shear only wall object is included in the Integrator and CXL file.
    • For TSD Revit, a new TSDI_Type object tag “SHEAR_ONLY” is included in the CXL file and written to the Revit model for all exported Shear Only wall objects as shown in the picture below.

      • Note that the Revit Name for the wall Material Grade must be manually selected on import into Revit (this selection can then be saved in the Mapping file).

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