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  • Answer

    Yes, the data is freely available. Use the following download option to load the presentations and finished models of the consultants.
  • Answer

    The RWIND Simulation program is protected against unauthorized use. The application works without restrictions on the single-user computer on which the software key-based license is activated. To release the assigned license (e.g. for use on a different single-user computer), the license can be deactivated again offline via email on the license-holding single-user computer. To do this, proceed as follows:

    1. Run the RWIND Simulation 'As Administrator'. To do this, right-click the RWIND Simulation icon and select 'Run as Administrator'.

      Figure 01 - Program Start

    2. Select the 'RWIND Simulation - License and Authorization' function in the 'Help' menu.

      Figure 02 - License and Authorization Settings

      This opens the 'RWIND Simulation 1.xx Authorization Status' dialog box.

    3. Check in the 'RWIND Simulation 1.xx Authorization Status' dialog box whether an active software key authorization is available. This is the case if the 'Software Key' option is selected in the 'Authorization Method' section and an active authorization is indicated by a green dot in the 'Authorization Status' section.

      Figure 03 - Authorization Status

      If the check is negative, and a red dot is displayed, no RWIND Simulation license based on a software key is activated on the single-user computer. Consequently, no license can be deactivated.

      If the above requirements are met, click the 'Deactivation via E-Mail' button. The 'Deactivation of RWIND Simulation' dialog box appears.

    4. The 'Deactivation of RWIND Simulation' dialog box explains the deactivation process.

      Select the 'Deactivate RWIND Simulation Now' function.

      Figure 04 - Email Deactivation

      This opens the 'RWIND Simulation 1.xx' dialog box.

    5. In the 'RWIND Simulation 1.xx' dialog box, select 'Yes' for the license deactivation.

      Figure 05 - Confirmation Prompt

      After successful deactivation, you will receive a confirmation message. You can use the program only in demo mode now.

      The dialog box 'Deactivation of RWIND Simulation' opens again.

    6. Deactivation code is now displayed in the ‘Deactivation of RWIND Simulation’ dialog box. Copy this text block to the Windows clipboard with the 'Copy to Clipboard' function and then paste the code into a blank e-mail with [Ctrl]+[V] or the Windows paste function. Send this email to support@dlubal.com to complete the license deactivation.

      Figure 06 - Sending Deactivation Code

      With this code, we document a proper deactivation in our system.
    You can now reactivate the released license on another single-user computer.

  • Answer

    For the punching shear design on a column, RF-PUNCH Pro requires a node at which the axial force of the column can be tapped for the design.

    If you have displayed the column as a solid (for example, with a rectangular cross-section) and directly connect this solid to the floor, you cannot use this situation for the design in RF-PUNCH Pro. The member internal force is missing because only one solid is used.

    However, you can provide the end of the solid with a short coupling member (for example, a rigid member). Then, the rigid member can be connected to the floor at an end node, and the axial force in the coupling member can be used for the punching shear design.

    Please note that the dimensions of the coupling member or rigid member need not be defined in the RFEM model. Therefore, the RF-PUNCH Pro applies standard dimensions for the column cross-section.
  • Answer

    The shear correction factor is taken into account in the RF-LAMINATE program using the following equation.


    $k_{z}=\frac{{\displaystyle\sum_i}G_{xz,i}A_i}{\left(\int_{-h/2}^{h/2}E_x(z)z^2\operatorname dz\right)^2}\int_{-h/2}^{h/2}\frac{\left(\int_z^{h/2}E_x(z)zd\overline z\right)^2}{G_{xz}(z)}\operatorname dz$

    with $ \ int _ {- h/2} ^ {h/2} E_x (z) z ^ 2 \ operatorname dz = EI _ {, net} $

    The calculation of the shear stiffness itself can be found on page 15 of the English version to the manual of RF-LAMINATE as follows:

    For the 10 cm thick plate in Figure 1, the calculation of the shear correction factor is shown. The equations used here are only valid for the simplified symmetrical plate structures!

    Layerz_minz_maxE_x (z) (N/mm²)G_xz (z) (N/mm²)
    1-50-3011000690
    2-30-1030050
    3-101011000690
    4103030050
    5305011000690

    $\sum_iG_{xz,i}A_i=3\times0,02\times690+2\times0,02\times50=43,4N$

    $EI_{,net}=\sum_{i=1}^nE_{i;x}\frac{\mbox{$z$}_{i,max}^3-\mbox{$z$}_{i,min}^3}3$

    $=11000\left(\frac{-30^3}3+\frac{50^3}3\right)+300\left(\frac{-10^3}3+\frac{30^3}3\right)$

    $+11000\left(\frac{10^3}3+\frac{10^3}3\right)+300\left(\frac{30^3}3-\frac{10^3}3\right)+11000\left(\frac{50^3}3-\frac{30^3}3\right)$

    $=731,2\times10^6Nmm$

    $\int_{-h/2}^{h/2}\frac{\left(\int_z^{h/2}E_x(z)zd\overline z\right)^2}{G_{xz}(z)}\operatorname dz=\sum_{i=1}^n\frac1{G_{i;xz}}\left(χ_i^2(z_{i;max}-z_{i,min})\;χ_iE_{i,x}\frac{z_{i,max}^3-z_{i,min}^3}3+E_{i,x}^2\frac{z_{i,max}^5-z_{i,min}^5}{20}\right)$

    $χ_i=E_{i;x}\frac{z_{i;max}^2}2+\sum_{k=i+1}^nE_{k;x}\frac{z_{k,max}^2-z_{k,min}^2}2$


    χ113.75 106
    χ2
    8.935 106
    χ3
    9.47 106
    χ4
    8.935 106
    χ5
    13.75 106


    $\sum_{i=1}^n\frac1{G_{i;yz}}\left(χ_i^2(z_{i,max}-z_{i,min})-χ_iE_{i,y}\frac{z_{i,max}^3-z_{i,min}^3}3+{E^2}_{i,y}\frac{z_{i,max}^5-z_{i,min}^5}{20}\right)=$


    8.4642 1011
    3.147 1013
    2.5 1012
    3.147 1013
    8.4642 1011

    Total 6.7133 x 1013

    $k_z=\frac{43,4}{{(731,2e^6)}^2}6,713284\;e^{13}=5,449\;e^{-3}$

    $D_{44}=\frac{{\displaystyle\sum_i}G_{xz,i}A_i}{k_z}=\frac{43,4}{5,449\;e^{-3}}=7964,7N/mm$

    This corresponds to the value output in RF-LAMINATE (Figure 2).
  • Answer

    The RWIND Simulation program is protected against unauthorized use. The application works without restrictions on the single-user computer on which the software key-based license is activated. To release the assigned license (e.g. for use on another single-user computer), the license can be deactivated online again on the license-holding single-user computer. To do this, proceed as follows:

    1. Run the RWIND Simulation 'As Administrator'. To do this, right-click the RWIND Simulation icon and select 'Run as Administrator'.

      Figure 01 - Program Start

    2. Select the 'RWIND Simulation - License and Authorization' function in the 'Help' menu

      Figure 02 - License and Authorization Settings

      This opens the 'RWIND Simulation 1.xx Authorization Status' dialog box.

    3. Check in the 'RWIND Simulation 1.xx Authorization Status' dialog box whether an active software key authorization is available. This is the case if the 'Software Key' option is selected in the 'Authorization Method' section, and an active authorization is indicated by a green dot in the 'Authorization Status' section.

      Figure 03 - Authorization Status

      If the check turns out to be negative and a red dot is displayed, no RWIND Simulation license based on a software key is activated on the single-user computer. Consequently, no license can also be deactivated.

      If the above requirements are met, click the 'Deactivate Online' button. The 'Online Deactivation' dialog box appears.

    4. The 'Online Deactivation' dialog box shows the license specification to be deactivated.

      Select the 'Deactivate Now' function.

      Figure 04 - Online Deactivation

      This opens the 'RWIND Simulation 1.xx' dialog box.

    5. In the 'RWIND Simulation 1.xx' dialog box, select 'Yes' for the license deactivation confirmation dialog box to permanently deactivate the license.

      Figure 05 - Confirmation Prompt

      After successful deactivation, you will receive a confirmation message. You can use the program only in demo mode now.
    You can now reactivate the released license on another single-user computer.

  • Answer

    Yes, you can consider the static rest position in a time history analysis. For this you can use the 'Stationary State' function (not available in the linear modal analysis).


    With this function, it is possible to read a condition from a load case or a load combination that exists over the entire time history. These include the deformations, the stiffness modifications, and the states of nonlinearities.

    This function is activated in the RF-/DYNAM Pro add-on module, in the 'Calculation Parameters' tab of the Dynamic Load Cases.


    The time history diagram is well suited for results evaluation. In the attached example, load case 1 with the dead load was defined as a stationary state. In the time diagram, it can be seen that the deformations oscillate about the value that is reached by the static rest position.

  • Answer

    The RWIND Simulation program is protected against unauthorized use. The program can be authorized offline (computer is not connected to the Internet) by activating an email. To do this, proceed as follows:

    1. Run the RWIND Simulation 'As Administrator'. To do this, right-click the RWIND Simulation icon and select 'Run as Administrator'.

      Figure 01 - Program Start

    2. Confirm the authorization check with the 'Activate Now' function.

      Figure 02 - Authorization Check

      This opens the 'RWIND Simulation 1.xx Demo Authorization Status' dialog box.

    3. In the 'RWIND Simulation 1.xx Demo Authorization Status' dialog box, select the 'Software Key' option in the Authorization Method area and click the 'Activation via E-Mail' function in the lower part.

      Figure 03 - Email Activation

      This opens the 'Activation by E-Mail' dialog box.

    4. In the 'Activation by E-Mail' dialog box, enter your license information (license number and/or name and address of the institution that purchased the program license) based on your contract documents.

      Further, enter a user-defined description of the workstation to be activated under 'Description of Workspace' and the RWIND Simulation level with an expiry date of the activation to be carried out under 'Required Authorization'.

      Then confirm your entries by clicking the 'Generate Request Code' function.

      Figure 04 - Generating Request Codes

      This opens the 'RWIND Simulation 1.xx Demo' dialog box.

    5. Check the entries made in the 'RWIND Simulation 1.xx Demo' dialog box. If they comply, confirm the dialog box with 'OK'.

      Figure 05 - Checking Entries

      This opens the 'Activation by E-Mail' dialog box.

    6. The 'Activation via E-Mail' dialog box consists of three parts. In the 'Step 2' tab, the required request code is displayed on the left. Copy this text block to the Windows clipboard with the 'Copy Request Code' function and then paste the code into a blank e-mail with [Ctrl]+[V] or the Windows paste function. Send this email to support@dlubal.com for further processing.

      Figure 06 - Sending Request Code

    7. You will receive an activation code from us. In the dialog box, go to the 'Step 3' tab and enter this code in the 'Activation Code' field.

      Then, start the activation process by clicking the 'Activate Now' function.

      Figure 07 - Program Activation

      After successful authorization, you will receive a confirmation message and it is possible to use the program without any restrictions.
    This offline email activation occupies the license you have purchased for the defined activation period in our system. During this period, it is not possible to activate the RWIND Simulation program with the same license on any other computer. The assignment of the license in our system ends with a proper deactivation or after the defined activation period has expired.

    Afterward, the activation process can be carried out again on the same or a different computer. Please note that e-mail request codes can only be used once for activation. To reactivate, a new request code must always be sent to us.

    To avoid unnecessary license assignments in our system due to unexpected computer problems on your part (defect, loss, hardware replacement, change of employees, etc.), we recommend that you keep the activation period as short as possible.

  • Answer

    It is possible to display or calculate the stresses in RFEM as well as in the add-on module by means of the following smoothing options:

    • Constant on elements
    • Not continuous
    • Continuous within surfaces
    • Continuous total
    • Continuously by groups or Continuous by groups

    To compare the results, the same display type and calculation type must be selected in RFEM and RF-STEEL Surfaces.

    In RFEM, it is possible to do this in the Project Navigator Show → Results → Surfaces → Distribution of Internal Forces/Stresses (Figure 02). In RF-STEEL Surfaces, this can be displayed or changed in the Details → 'Options' tab (Figure 03).

  • Answer

    The easiest way to find a member is to select Project Navigator - Data. Here, right-click the members and select "Find Members." Now you can enter the member number and the member is marked with an arrow in the graphic.
  • Answer

    To consider average regions when designing in RF-LAMINATE, they must always be activated in the detail settings of the add-on module. See Figure 01 with the detailed settings in RF-LAMINATE for this.

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First Steps

First steps

We provide hints and tips to help you get started with the main programs RFEM and RSTAB.

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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