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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. Ceiling with downstand beam

    Subsequent modeling of a downstand beam under an existing ceiling

    When subsequently modeling a beam under an existing floor, the first question arises is which forces are to be transferred between the downstand beam and the floor and whether a bond effect is the goal. In this case, the floor should rest on the downstand beam without any bond.

  2. System and Load

    Design of local load introduction according to EN 1993-1-3

    The design of cold-rolled steel products is governed by EN 1993-1-3. Typical shapes of cold-formed cross-sections are U, C, Z, Hut, or Sigma sections. They are produced from thin-walled sheet metal by roll-forming or edging methods. When designing the ultimate limit states, it is also necessary to ensure that local load application does not lead to compression, crippling of the web or local buckling in the web of the cross-sections. These effects can be caused by local load application through the flange into the web as well as by support forces at the supported points. Section 6.1.7 of EN 1993-1-3 specifies in detail how to determine the resistance of the web Rw, Rd under local load application.

  3. Model check with nodal union

    Function "Unite Nodes": Logic and Use Case

    In RFEM and RSTAB, there are many interfaces available that can simplify the modeling of the structure. From a DXF foil set in the background to the import of IFC objects that can be converted into members or surfaces, to the import of the entire structural system from Revit or Tekla. Regardless of the performance of the selected interface, the further usability also depends on the accuracy of the imported data.

  4. Effective Section Properties

    Design of a Thin-Walled, Cold-Formed C-Section According to EN 1993-1-3

    Utilize the RF-/STEEL Cold-Formed Sections module extension to perform ultimate limit state designs of cold-formed sections according to EN 1993-1-3 and EN 1993-1-5. In addition to the cold-formed cross-sections from the cross-section database, you can also design general cross-sections from SHAPE-THIN.

  5. Tilting a single-span beam

    Lateral-torsional buckling in timber construction: Theory

    Slender bending beams with a large h/b ratio and loaded parallel to the minor axis tend to have stability problems. This is due to the deflection of the compression chord.

  6. Maximum distortion at the top

    Nonlinear calculation of a floor slab made of steel fiber reinforced concrete in the ultimate limit state with RFEM

    Steel fiber reinforced concrete is nowadays mainly used for industrial floors or hall floors, for foundation plates with low loads, basement walls and basement floors. Since the publication of the first guideline by the German Committee for Reinforced Concrete (DAfStb) about steel fiber reinforced concrete in 2010, the structural engineer can use standards for the design of the composite material steel fiber reinforced concrete, which makes the use of fiber reinforced concrete increasingly popular in construction. This article describes the nonlinear calculation of a foundation plate made of steel fiber reinforced concrete in the ultimate limit state in the FEM program RFEM.

  7. System

    Stability analysis of a column under normal force and bending

    In the following, a pendulum column with a centrally acting axial force and a line load acting on the strong axis will be determined by means of the RF-/STEEL EC3 add-on module according to EN 1993-1-1.

  8. Velocity Field on Vertical Cross-Section

    Wind Loads on a Tall Building

    The following study compares the wind pressure on a tall building obtained by RWIND Simulation with the results published by Dagnew et al. at the 11th Americas Conference on Wind Engineering in June 2009. In this paper, the Commonwealth Advisory Aeronautical Council (CAARC) building is used as a model and results of several different numerical methods are compared with experimental data obtained from wind-tunnels.

  9. Details about the layer structure

    Calculation and use of laminated glass

    In the field of glass construction, there are various glasses and layer structures that are used for different purposes. In the classic case, these are: Float glass, tempered glass, and toughened safety glass.

  10. Input of factor for reduction fct, eff, As, min

    Assumptions for the effective tensile strength in connection with the determination of the minimum reinforcement according to DIN EN 1992-1-1 7.3.2

    When determining the minimum reinforcement for the serviceability limit state according to 7.3.2, the applied effective tensile strength fct, eff has a significant influence on the determined amount of reinforcement. The following section provides an overview for determining the effective tensile strength fct, eff and the input options in RF-CONCRETE.

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