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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In principle, our software runs on a Microsoft Surface Tablet. Make sure that the tablet is equipped with the 64-bit version of Windows 10. The latest versions of RSTAB and RFEM are only available for 64-bit Windows.
However, one problem is that these tablets are all equipped only with an Intel graphics chip. The OpenGL implementation in its graphics driver is not very good. This may lead to crashes. A problem of the current graphics driver is that the nodes are not displayed in RSTAB and RFEM.
AnswerIn most cases, only the material's name is transferred. If the name differs from the Dlubal Material Database name, the base parameters (modulus of elasticity, shear modulus, etc.) or the additional properties (yield strengths, tensile strengths, limit strains, etc.) are not defined. In such cases, it is not even possible to determine the internal forces of the structure.Some interfaces (for example Revit) are able to transfer the basic properties. However, the design modules present problems because they require additional material properties. However, these are only available as information in the databases specific to Dlubal.We can resolve this topic by linking the name of the imported material with the unique name of the Dlubal material library. This linking can be done in the conversion tables. To open the tables, click "File" - "Import" in the "Details" tab. The handling is relatively simple. On the left, enter the material name from the export file or the CAD application. On the right, the name according to the Dlubal Material Database. It can also be called directly.If you have several entries with a similar notation, you can use so-called "regular expressions". Further help can be found in the conversion file itself. The path is shown in the detail settings.The user is requested to create own tables. Dlubal can not provide any tables due to the multitude of programs and notations.
AnswerIn the menu bar of the program under the entry "Table -> Settings "various adjustments to the table can be made. This also allows the font and size to be adjusted as required (see Figure 1).
AnswerFE-BEUL offers in the details the choice between a rigid and deformable support stiffness for determining the reduction factor for shear bumps (see Figure 1).
AnswerThe downwardly curved, synclastic roof geometry is numerically stable for downward loads. Loads in the direction of the arc ultimately increase the tensile load in the membrane and thus stabilize the structure.Loads against the arch shape of the roof reduce the tensile load in the membrane. If the tensile stress of the membrane cable approaches zero in this case, numerical difficulties result due to the sole, membrane tension resistance of the element used. In this case, the solution process reacts with a poor convergence, instability messages, or messages about a positive definite Jacobian matrix.
AnswerA parts list of the cross sections can be generated with the dimensioning modules (eg RF- / STEEL EC3) and output to Excel (see figure 1).Furthermore the bar table can be exported to Excel. This table can then be evaluated in Excel, for example using a PivotTable (see Figure 2).In addition, information such as the length of bars or material mass can be determined using the Center of Gravity and Info feature. To do this, first select the bars with the relevant cross-section and then select the "Center of gravity and information" command from the context menu (see Figure 3).Alternatively, the output of a parts list can be programmed with the RF / RS-COM interface, as described in the entry COM Interface in VBA | Creating a parts list shown.
Do I have to print the corresponding tables in the log? I really just want to take pictures.
AnswerIf you want to print graphics in a log, the corresponding subitem must be active in the selection of the printout log in the "Global Selection" tab, see Figure 1. As a result, the tables are also displayed.
If only images are to be printed in the log, it is necessary to deactivate the tables in the tabs, see Figure 2.
The node support forces can be exported in Table 4.1 "Nodes - Support Forces" (RFEM) or 4.4 "Nodes - Support Forces" (RSTAB) by using the [Export / Import of Table] button. Under "Results for LC / CO / RC", you can decide if the currently set load case or combination, all or only specific load cases, load and result combinations should be exported.
To dock the table or the navigator on any screen page, "capture" the object by the title bar and then drag & drop onto the respective placement button while holding down the left mouse button (see the figure).
As an alternative, you can double-click the title bar of the table or the navigator.
This problem occurs if the imported cross-section description does not exist in RFEM / RSTAB. For such cases, it is possible to create a kind of 'translation table' in the form of a conversion file. You can open it in the "Details" tab of the "Import" dialog box (see Figure).
During an import, the program then converts all entered cross-sections so that they are recognized by RFEM / RSTAB.
Equally, a conversion table is available for materials.
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