Buckling length calculation

1•2•Build can calculate buckling lengths. It uses the same principle as Diamonds. But while Diamonds has 3 scenario’s to calculate the buckling length, 1•2•Build only contains one of the three: semi-displaceable nodes.

For each bar, 1•2•Build therefore calculates the structure twice: once for buckling about the strong axis by applying a load perpendicular to the strong axis and once for buckling about the weak axis by applying a load perpendicular to the weak axis. In the second case – buckling about the weak axis – 1•2•Build naturally takes into account that the structure you have defined cannot move in a direction perpendicular to the XY plane at the ends of the bars.

To change the buckling lengths:

• For steel or timber cross-sections:
  • Click on the icon to show the results for the stability.
  • Double click a bar to open the detailed results of the stability. In the dialogue that appears, you can change the buckling length.
• For concrete cross-sections:
  • Click on one of the 3 icons representing a reinforcement result , , .
  • Double click on a bar in the model window. In the dialogue that appears, you can change the buckling length.

To display the buckling lengths for the various bars in the model window, activate the menu command “Show – General parameters” or click on . In the dialogue, indicate that you want to see the buckling lengths.