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001991
Ing. Robert Martinec
2021-05-05
Different Negative Moments on Connection Corners
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The four equally loaded plates show different negative moments at the point of support, which raises the question of whether this is an error. In fact, the different smoothing of the results is due to the set interpolation on a slab-by-slab basis, which does not account for adjacent slabs. This phenomenon shows how the smoothing settings can affect the interpretation of the structural outputs and thus engineering conclusions. Analysis of internal forces and stresses with respect to smoothing is crucial for accurate engineering design.

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Plate Interaction with Different Moments

Number of Nodes 9
Number of Lines 12
Number of Surfaces 4
Number of Load Cases 2
Number of Load Combinations 8
Number of Result Combinations 4
Total Weight 11.150 t
Dimensions (Metric) 5.000 x 5.000 x 0.000 m
Dimensions (Imperial) 16.4 x 16.4 x 0 feet
Program Version 5.25.02

You can download this structural model to use it for training purposes or for your projects. However, we do not assume any guarantee or liability for the accuracy or completeness of the model.

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Product Features
Feature 002905 | RVE Material Model for Fabric Materials

The "Orthotropic | Fabric | Nonlinear Elastic (Surfaces)" material model allows you to define prestressed fabric membranes using the representative microstructure-solid element model – RVE.

By considering the fabric geometry in the microstructure model, the corresponding transversal strain effect can now be considered for all force conditions in the membrane.

Feature 002443 | Control of Crack Condition for Deformation and Crack Width Analysis

Various design parameters of the cross-sections can be adjusted in the serviceability limit state configuration. The applied cross-section condition for the deformation and crack width analysis can be controlled there.

For this, the following settings can be activated:

  • Crack state calculated from associated load
  • Crack state determined as an envelope from all SLS design situations
  • Cracked state of cross-section - independent of load
Feature 002415 | Improved Segmentation for Deformation Analysis

In the "Deflection and Design Support" tab under "Edit Member", the members can be clearly segmented using optimized input windows. Depending on the supports, the deformation limits for cantilever beams or single-span beams are used automatically.

By defining the design support in the corresponding direction at the member start, member end, and intermediate nodes, the program automatically recognizes the segments and segment lengths to which the allowable deformation is related. It also automatically detects whether it is a beam or a cantilever due to the defined design supports. The manual assignment, as in the previous versions (RFEM 5), is no longer necessary.

The "User-Defined Lengths" option allows you to modify the reference lengths in the table. The corresponding segment length is always used by default. If the reference length deviates from the segment length (for example, in the case of curved members), it can be adjusted.

Feature 002416 | Result Display via Clipping Plane

This feature also contributes to the clearly-arranged display of your results. Clipping planes are intersecting planes that you can place freely throughout the model. The zone in front of or behind the plane is consequently hidden in the display. This way, you can clearly and simply show the results in an intersection or a solid, for example.

Frequently Asked Questions (FAQ)
I would like to define a line support with ineffective tension and apply the tension force on this line using a nodal support instead. Why does the line support still receive a tension force?
I obtain different results when comparing the deformation analysis in the RF‑CONCRETE add-on modules and another calculation program. What could be the reason for this?
Are the models and presentations from Info Day 2017 freely available, and can you send them to me?
How can I model a support of a member on a bracket with screws?
Which analysis is used in RF‑STAGES or STAGES to calculate temporary loads and the generated combinations?
Are the models and presentations from Info Day 2019 freely available, and can you send them to me?
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