Failure of Nodal Supports

Tips & Tricks

If nodal supports should have an effect in certain directions only, you can define failure. Here is an example of a single‑span beam, whose right support can only absorb positive vertical loads. The load comprises vertical suction load and horizontal load.

However, there are two options for the failure:

  1. Failure if negative PZ'
  2. Failure all if negative PZ'
  3. The difference is illustrated in the graphic.

If there are additional horizontal forces after the vertical failure of the support with Option 1, the support with Option 2 fails completely. Therefore, it is necessary to select the proper nonlinearity according to the circumstances.


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