In addition to our technical support (e.g. via chat), you’ll find resources on our website that may help you with your design using Dlubal Software.
Frequently Asked Questions (FAQ)
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If you want to calculate stresses in SHAPE‑THIN, it is necessary to create at least one load case. You can create a new load case by using:
- Menu "Insert" → "Loads" → "New Load Case"
- Shortcut menu of the "Load Cases" entry in the navigator
- Entry in Table "2.1 Load Cases"
Furthermore, it is necessary to define internal forces. You can enter the internal forces by using:
- Menu "Insert" → "Loads" → "3.1 Internal Forces" → "Dialog Box"
- Entry in Table "3.1 Internal Forces"
- Import of internal forces from RFEM or RSTAB in Table "3.1 Internal Forces"
After the calculation, you can display the stresses graphically and in tables (Figure 01). This is also shown in the video.
AnswerResultants in the horizontal direction are generally obtained if the respective component is not released and is based on a non-doubly symmetrical floor plan.
AnswerYou can use the COM interface to save the graphics to the clipboard and print them automatically from there.
The positive and negative direction refers to the axis system of the line release. The forces, for example vz, are related to the object on the original line.
In the following, the definition will be briefly explained using the example of a release between wall and ceiling. If the wall is the released object, the definition for a lifting load failure would be as follows:
- Between the floor slab and the wall, the nonlinearity "Fixed if negative vz" should be selected.
- Between the wall and the ceiling above, the nonlinearity "Fixed if positive vz" should be selected.
If the failure is defined incorrectly, you can check it with the determined deformation diagram.
AnswerMany webinars and online videos explain the automatic load combination, for example, for Eurocode. An example of this can be found directly on YouTube here.However, due to time reasons, these webinars and videos often do not include any accidental combination, such as those necessary for a fire situation or earthquake.Such a combination can be generated just as easily and flexibly as the combination for the ultimate limit state (ULS) or the serviceability limit state (SLS).The generation of it is shown in the attached video.In summary, the following steps are necessary (the structure and load cases are already defined):
- Activating the automatic generation of combination in General Data (Figure 01)
- In the Combination Expressions tab, select the accidental combination with psi1 or psi2 as leading (Figure 02).
- Ideally, create the combinations with an enveloping result combination.
- Select the created result combination for design in the add-on module, for example RF-/TIMBER Pro, under the "Fire Resistance" tab.
In the details of all add-on modules, you can control the display of result tables. In this case, it is helpful to only display the results by load case or by material.
In the RF‑STEEL Surfaces add-on module, it is also possible to perform the calculation of enveloping values only.
Furthermore, it may be helpful to display the results in grid points. For the RF‑LAMINATE add-on module, it is also possible to completely hide the results of the grid points. A detailed description of this can be found here .
The settings for the RF‑STEEL Surfaces add-on module are shown in Figure 01.
Please check the Windows fonts on your PC and check if the "Symbol Standard" font is installed. This is required to display the symbols correctly.
AnswerRFEM uses OpenGL for the graphical display. If available, RFEM uses the hardware acceleration of the graphics card. If this does not support hardware acceleration, RFEM uses the software implementation of Windows OpenGL.In the case no hardware acceleration can be used, the graphical display is considerably slower. The extent to which this has a negative effect on the usability of RFEM depends on the size of the processed RFEM models.For many (not all) hypervisors, it is not possible to use the hardware-accelerated OpenGL. RFEM would basically run in the virtual machine. However, the graphic display would be slower.We recommend to test on a typical RFEM model whether the speed of RFEM in the virtual machine is acceptable.Please note that our Support can only help you to a limited extent when using virtual machines.
AnswerThe Geo-Zone Tool is a pure web application. As a result, the associated web service can be accessed via system port 443.
The "Special Selection" function allows you to select the objects with specific properties. To open the Special Selection dialog box, use the menu Edit → Select → Special or the corresponding toolbar button.
In the "Special Selection" dialog box, select the "Members" category and activate the "With length" check box. The length range can then be entered in the "from" and "to" text boxes. Use the "Select Member and Import Properties" button to import the member length (Figure 01).
The video shows how to select the members that correspond to the member length of a particular member. Furthermore, it shows how to select the members that rest in a certain length range.
Did you find your question?
If not, contact us via our free e-mail, chat, or forum support, or send us your question via the online form.
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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