Why does the Status tree Report a Design > Sway Warning?
Not version-specific
Tekla Structural Designer
Environment
Eurocode
Question
Why do I get a warning triangle reported for sway in the Project Workspace > Status > Design tree ?Image
Answer
In this article you will gain an understanding as to why you obtain a Project Workspace Status > Design > Sway warning in your model.If you hover over the Sway text it advises you to check the Sway review tables for further details.
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The Tabular Data tables can be found to the far right of the Review ribbon.
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- Select the Sway view type
- Choose the Materials to display
- Click the Alpha_crit Direction 1 or 2 column heading to order ascending or descending.
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The Sway warning is provided because the lowest Alpha_crit value reported in the table is less than the allowable value for the analysis type performed under Design ribbon > Design Options - Analysis.
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To resolve you could;
- Increase the lowest Alpha_crit value to above the lowest value for the chosen analysis type by increasing stiffness or
- Change the analysis type to a Second-order analysis method to include second order effects.
The lowest Alpha_crit value in the table must always be greater than the chosen analysis type for the Status tree > Design > Sway warning to not appear.
You can locate the problem element in the model by using the Home ribbon > Find command.
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In the example above, the lowest Alpha_crit value was reported as 4.936. Changing to one of the Second-order analysis methods (where 4.936 is greater than the lower limit for the analysis method) removes the warning as the second-order effects are included in the analysis/design.
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