Splitting a beam in Prokon Frame Analysis is a common task to refine the model, introduce intermediate supports, or apply concentrated loads or point hinges at specific locations. Here’s a step-by-step guide to understanding the importance of splitting a beam.
Example, Modelling a Single Beam with Uniformly Distributed Load (UDL)
When modelling a Single Beam in Prokon frame, loaded with a UDL and fully supported at both ends.
The analysis may yield inaccurate deflection results.
Observation Behaviour:
- Deflection is reported as 0.
- Shear and moment values are calculated.
Cause:
- Deflection is only calculated at nodal points, and if the beam is not split, intermediate deflections are not captured.
Solution:
- To obtain accurate deflection results, the beam must be split into smaller segments.
Steps to Split a Beam
- Open the Beam Input Window
- In Prokon Frame, go to the Input tab and navigate to the Beam Input window
- Locate the Split Beam tool within the beam input window
- Access the Split Beam Dialogue:
- Open the Split Beam Dialogue
- Configure Splitting Parameters
- Specify the number of subdivisions for the beam: split the beam into 5 or more equal segments
- Select the appropriate mode:
- Single Beam Mode: Split a single selected beam.
- Beams Group Mode: Apply splitting to multiple beams simultaneously (if needed).
- Applying the Splitting
- Select the beam to be split.
- Confirm the settings in the Split Beam Dialogue.
- Click OK to split the beam into the specified number of segments.
- Re-Run the Analysis
- Perform the analysis again after splitting the beam.
- Observe that the deflection is now calculated at the newly introduced nodes.
Deflection is calculated at intermediate nodes, providing a realistic representation of the beam’s behaviour. Splitting beams in Prokon Frame Analysis is essential for achieving precise deflection and force results, especially for long spans or complex load conditions. By following these steps, engineers can ensure that their models accurately reflect real-world structural behavior.
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