Nonlinear buckling may be evaluated in SAP2000 using Nonlinear static analysis. This procedure takes an iterative approach while implementing P-Delta and Large-Displacement effect. Structural response is shown by plotting selected joint displacements against load application. A softening behavior may be observed in this plot, indicating the onset of buckling, and the condition of instability which follows.

Modeling tips

Difference between Linear and Nonlinear buckling

 

The CSI Analysis Reference Manual is an excellent resource for information on buckling. We recommended the following chapters:

See Also