4.9 Buckling analysis manual calculations Single column, pinned top and bottom. Calculate buckling analysis by hand. The supplied Calcsheet contains an equation to calculate the critical buckling load.
A manual Calculation can be done to calculate the buckling capacity of the single column.
Buckling Analysis with 1 Segment vs. Buckling analysis with 10 segments.
Buckling factor is too high compared to manual calculation – only one segment in the column; the column is numerically too stiff.
4.10 Second-order unsuccessful Bottom chords of trusses are unbraced, buckling analysis will show this.
For a buckling analysis, values between 0 and 1 indicate that an element (or elements) in the structure will buckle. Buckling factors should be greater than 1.
4.11 Area support lifting Area support doesn’t allow tension in springs. Uplift load case has no restraint against complete uplift.
4.12 Drop objects tool to modify geometry In the example, one of the purlins are only connected at one end. The other end is higher than the rafter.
Use the Drop Objects to connect the higher end to the rafter.
Sumo Workshop Training Manual
Page 3
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