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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.

  1. Activated Display Option: Topology on the form-finding form

    Display of Topology on Deformed Structure

    With the activated option "Topology on form-finding shape" in the Project Navigator - Display, the model display is optimized based on the form-finding geometry. For example, the loads are displayed in relation to the deformed system.

  2. "Show Preliminary Form-Finding" Function in the Shortcut Menu

    Automatic Preliminary Form-Finding of Membrane Surfaces

    Activating the "Display shape" option in the shortcut menu leads to an automatic preliminary form-finding according to the saved form-finding properties when you change the structure of membrane surfaces. This interactive graphics mode is based on the force density method.

  3. Export Option " Update only materials, thicknesses, and sections

    Updating the Revit Model

    The direct interface with Revit allows you to update the Revit model according to the changes you have made in RFEM or RSTAB. Depending on the modification, the Revit objects may have to be regenerated (deleting the object and subsequent regeneration). The regeneration is performed on the basis of the RFEM/RSTAB model.

    If you want to avoid this regeneration, activate the option "Update only materials, thicknesses, and sections." In this case, only the properties of the objects will be adjusted. Changes differing in material, surface thickness, and section are, however, not considered in this case.

  4. Defining 2 FE Mesh Layers for One Gas Solid

    Considering the Stiffness of Gas Solids in Nonlinear Time History Analysis

    The stiffness of gas given by the ideal gas law pV = nRT can be considered in the nonlinear dynamic analysis.

    The calculation of gas is available for accelerograms and time diagrams for both the explicit analysis and the nonlinear implicit Newmark analysis. To determine the gas behaviour correctly, at least two FE layers for gas solids should be defined.

  5. Defining a Load Eccentricity for a Uniform Member Load

    Eccentricity of Member Loads

    001391

    RFEM Calculation

    For member loads of the load type "Force", you can define eccentricities. You can apply the load eccentricities by means of an absolute or relative offset.

    It is recommended to use the large deformation analysis to consider all effects of eccentric loads.

  6. Graphical and Tabular Display of the Forces of a Line Release

    Display of Forces and Deformations of Hinges and Releases

    001378

    RFEM Results

    RFEM offers the following tables to display forces and deformations of hinges and releases:

    • 4.45 Line Hinges - Deformations
    • 4.46 Line Hinges - Forces
    • 4.47 Member Hinges - Deformations
    • 4.48 Member Hinges - Forces
    • 4.49 Nodal Releases - Deformations
    • 4.50 Nodal Releases - Forces
    • 4.51 Line Releases - Deformations
    • 4.52 Line Releases - Forces

    The tables can be displayed in the prinout report. Moreover, the results in line hinges and line releases can be displayed graphically. It can be controlled by the Project Navigator - Results.

  7. Transfer of Reinforcement from RFEM/RSTAB (Top) to Revit (Bottom)

    Bar Reinforcement Export to Revit

    The reinforcement concept from RF-/CONCRETE Members can be exported to Revit. Rectangular and circular cross-sections are possible at the moment. The reinforcement bars can be modified afterwards in Revit.
  8. Load Type "Imposed Line Deformation"

    Imposed Line Deformation

    Imposed line deformations can be defined for supported lines in RFEM. For example, foundation settlements can be simulated with this function.

    Moreover, it is possible to define imposed rotations for lines.

  9. Foil Cushion with Material Model Isotropic Plastic 2D/3D

    Nonlinear Material Law for Membranes

    RFEM provides the option to couple surfaces with the stiffness types "Membrane" and "Membrane-Orthotropic" with the material models "Isotropic-nonlinearly elastic 2D / 3D" and "Isotropic Plastic 2D / 3D" (add-on module RF-MAT NL required).

    This functionality allows you to simulate the nonlinear strain behavior of z. Eg ETFE films.

  10. Member Hinge Nonlinearity "Scaffolding Diagram"

    The member hinge nonlinearities "Scaffolding - N phiy phiz" and "Scaffolding Diagram" enable the mechanical simulation of a tube joint with an inner stub between two member elements.

    The equivalent model transfers the bending moment via the overpressed outer pipe and after positive locking additionally via the inner stub, depending on the compression state at the member end.

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