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.
Nodal Support Failure
If nodal supports should have an effect in certain directions only, you can define failure. Here is an example of a single‑span beam, of which the right support can only absorb positive vertical loads. The load comprise vertical suction load and horizontal load. However, there are 2 failure options:
1) Failure if negative PZ'
2) Failure all if negative PZ'
The difference is illustrated in the graphic.
1) Failure if negative PZ'
2) Failure all if negative PZ'
The difference is illustrated in the graphic.
Author
Mr. Sühnel is responsible for the quality assurance of RSTAB; he also participates in product development and provides technical support for our customers.
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