Before running nonlinear analysis on a SAFE model, we recommend verifying the stability of the model under linear cases by checking the analysis run through Run > Last Analysis Run Log.
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- Convergence. Uplift analysis might not converge when stabilizing forces are insufficient to counteract uplift forces. You can check numerical issues and convergence issues via Run>last analysis run details. It also helps to rerun the model with the non converging cases as linear and review deformations to help narrow down the issues.
- Response Spectrum Results. Uplift analysis is anon-linear type of analysis, because of the nature of the method results from RSA are absolute and do not have sign or direction, hence they should not be used in an uplift analysis.
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*Related Incident:* 196284
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Review watch and learn videos 9 and 10 below:
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https://www.csiamerica.com/products/safe/watch-and-learn
Additional notes on the modeling of uplift include the following:
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