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November 7, 2012

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In this video, you’ll learn how to investigate your model for P-Delta Divergence errors.

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February 23, 2012

How Do I Resolve a P-Delta Instability?

Investigating P-Delta instabilities in RISA-3D (or RISA-2D) can be difficult. The first step is usually to solve the model without the P-Delta effect included to see if there are any obvious deflection problems that could cause issues with a P-Delta analysis.

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January 4, 2011

How to Use P-Delta Analysis in RISA-3D

P-Delta analysis induces shears into the model due to the second order effects of axial forces and lateral deflections, and can be automatically checked in RISA-3D with a few simple steps.

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December 29, 2010

What is P-Delta Analysis?

When a model is loaded, it deflects. The deflections in the members of the model may induce secondary moments due to the fact that the ends of the member may no longer be vertical in the deflected position.

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