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February 5, 2013

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In this video, you will learn how to fix instabilities in 2-dimensional models in RISA-3D.  There are three common examples in this video including two types of trusses and a frame. Watch the video: Visit our YouTube Channel

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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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June 13, 2011

How Do I Avoid Instability Warnings in a RISA-3D Model?

Have you ever received an instability warning when running a three dimensional RISA-3D model? This is because RISA-3D cannot build the stiffness matrix with the configuration you have modeled.

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May 10, 2011

Are You Receiving Instability Warnings for Your Truss Model in RISA-3D?

When running a truss model in RISA-3D, it’s quite common to receive an instability warning, but these can be easily resolved by following a few simple rules.

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March 9, 2011

How Do I Investigate My RISA-3D Model Using the Deflected Shape?

When your RISA-3D model is not behaving as you anticipated, one of the best tools you have is viewing the deflected shape.

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