Knowledge Base


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  • More than 45,000 users in 95 countries
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Wind Simulation & Wind Load Generation

With the stand-alone program RWIND Simulation, wind flows around simple or complex structures can be simulated by means of a digital wind tunnel.

The generated wind loads acting on these objects can be imported to RFEM or RSTAB.


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  1. Figure 01 - Variable Moment Distribution

    Application of Eccentricities in RF-CONCRETE Columns

    When calculating the internal forces for the buckling analysis with the method based on nominal curvature in RF-CONCRETE Columns, the required eccentricities have to be determined.
  2. Determination of the Degrees of Restraint of the Column Ends Taking Into Acount the Stiffness of the Connecting Beam

    Determination of Effective Lengths in RF-/CONCRETE Columns

    With RF-/CONCRETE Columns, it is possible to determine effective lengths for columns automatically. This article describes which entries are necessary and how the calculation of the effective lengths is carried out.
  3. Design of Big Openings in Beams and Downstand Beams

    Since the ultimate limit state of beams in the area of openings is affected, particular attention should be payed to this. In general, small openings can be sufficiently covered by adapting the beam structure to the openings. For big openings, it is necessary to consider and model the area separately.
  4. Downstand Beams, Ribs, T-Beams: Shear Joints

    In the construction process, it is often necessary to fabricate the concrete elements in sections. A classic example of this production in sections is the use of prefabricated downstand beams, in which the slab is completed in the on‑site concrete construction. By creating a new concrete area, interfaces may arise between the already hardened concrete and the fresh concrete. The transfer of the longitudinal shear forces arising between the partial cross‑sections must be considered in the design.

  5. Determination of Minimum Reinforcement for Centric Restraint on Thick Structural Components According to EN 1992-1-1

    In general, avoiding cracking in concrete structures is neither possible nor necessary. However, cracking must be limited in a way that the proper use, appearance and durability of the structure are not affected. Therefore, limiting the crack width does not mean preventing crack formation, but restricting the crack width to harmless values.

  6. Using Average Regions

    In order to use internal forces from average regions also for design of concrete surfaces, you have to activate them in the module. For this, click the [Details] button in the “Tools” tab and select the option “Apply the averaged internal forces in the defined average region for the ULS calculation and for the analytic method of SLS calculation”.

  7. Definition of Masonry

    At first glance, the material list for masonry seems to be empty. The reason for this is that bricks and mortar can be used in many combinations, which would lead to a very long and unclear list. Therefore, it is necessary to first create a new material for masonry in order to consider these possible combinations in the calculation.

  8. Adjusting Graphic Margins

    Sometimes, a model in the graphic window is displayed without filling the entire window or with too large margins after clicking the [Show Whole Model] button. In order to set the size of the graphic margins, click “Options” → “Display Margins and Stretch Factors”. The value specifies the percentage of the margin relative to the graphic window size.

  9. Improved and Extended Graphic Display of Reinforcement

    The new options for graphic display of reinforcement which were implemented in RF‑CONCRETE Members and CONCRETE are now also available in RF‑/CONCRETE Columns.

  10. Sections on Non-Straight Lines

    If a section is not on a straight line but on a curved or angled line, this line has to be defined as a polyline or a curved line accordingly. You can define the section along a line by using the “Create Section Numerically” function.

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