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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AnswerIf a real computer with the Windows operating system is actually used and no hardware changes and/or new installation of the operating system has been made, the license problem is usually caused by the following points:
- The mandatory service 'Sentinel LDK License Manager' may be damaged after a Windows update.
- The antivirus program blocks the file hasplms.exe.
- Other security software (e.g. Sandboxie) prevents proper communication of the license service.
AnswerYou may not be sufficiently authorized to install new programs. Try to right-click on the installation file from the menu, and select ‘Run As Administrator’. If this does not help make sure you have the rights to the folder. You can assign rights using Windows Explorer: Choose a folder and open the appropriate properties. On the Security tab, for example, you can define full access for a user group or a selected user using the Edit button.
Please select only members with a reinforced concrete cross-section in the input dialog box 1.6 for the design. If selecting members made of steel (e.g.), you will get the corresponding error message.Figure 01 - Message No. 2379 - Invalid Material DataIn case you select 'All Members', the members with a steel reinforcement area are automatically removed from the design.
Only the default setting of 1 load increment can be set when a complex nonlinear material model is defined. The reason for this is because the program cannot determine the correct material stiffness for each incremental loading amount. The exact maximum load needs to be applied to the structure in order to determine the state of the material's stress/strain diagram.Figure 01 - Material Model - Nonlinear material definedThis setting can be found and changed under "Calculation Parameters" as well as under the "Calculation Parameters" in the load cases and combinations dialog box.
AnswerIn fact, this error message appears only if a member end hinge that allows a rotation about the local x-axis has been assigned to a member at both ends. Thus, the member can rotate freely about its own axis and is therefore unstable.Assign a new release to one of the member ends where the degree of freedom φx is not hinged.
The polyline displayed in Figure 1 was created in the order of Nodes 1 → 2 → 3 → 4 → 5. This is also visible in column B 'Node No.' Table '1.2 Lines'. Thus, the line segments between nodes 3, 4 and nodes 4, 5 are overlapping so that the error message in Figure 2 is displayed.
The order of the nodes must be changed so that no line segments could overlap. In this example, we want to specify the order of Nodes 1 → 2 → 3 → 5 → 4, as shown in Figure 3.
You can also use the 'Explode Polyline' function to decompose the polyline (Figure 4). Then, two lines are created between nodes 5 and 4. Then, delete a line. You can also use the 'Regenerate Model' function in the 'Tools' menu.
Both approaches are demonstrated in the video.
If the result beam is defined correctly, there may be a coarse FE mesh in the door lintel area, which leads to rough inaccuracies in the results (in this case, shear forces, see Figure 1).
It is recommended to create about ten finite elements above the height of the door opening. For example, if the height above the door opening is 0.5 m, a target FE mesh width of 0.05 m is adequate in this area so that the desired results are achieved (see Figure 2: Shear forces).
The settings are made globally (Menu → Calculation → FE Mesh Settings) or by using a local FE mesh refinement.
One support was defined at a node that is not part of the set of members in the window ‘1.7 Nodal Supports’ of RF-/STEEL EC3. In this case, it is necessary to define support at a node existing in the set of members or delete this nodal support in the window '1.7 Nodal Supports' of RF-/STEEL EC3.
In Figure 1, for example, a set of member supports was defined for the set of members 1 on nodes 2 and 7. When the calculation starts, the message 'Node No. 7 with support does not exist in the set of members No.1. Please correct this in Table 1.7.' appears (Figure 2, Figure 3).
In window ‘1.7 Nodal Supports’ of the RF-/STEEL EC3, it is possible to get displayed only the selected set of members by clicking the 'Show Only Current Object' button and the node numbering can be displayed by clicking the 'Local Coordinate System' button (Figure 4). It is obvious that the node 7 is not contained in the set of members. Instead of at node 7, the support must be defined on a node contained in the member set (for example, node 6).
When modeling a contact solid, it must be noted, among other things, that the two contact surfaces must be arranged in parallel and designed identically.
In Figure 1, a contact solid with existing contact between the top and bottom surface should be created. The top contact surface is divided into two surfaces F2 and F3 and thus does not correspond to the bottom contact surface F1. Therefore, the error message shown in Figure 2 is displayed. It is necessary to define two contact volumes in this case. The contact solids can be created, for example, by the function "Create Solid with Contact." To do this, select the contact surfaces and open the corresponding function in the shortcut menu; alternatively, it is possible to create the contact solid manually. Watch the FAQ explanatory video to see both procedures.
To prevent the error message (Figure 1) from appearing and the calculation to be started, it is necessary to assign a material to the corresponding point elements as follows:
- Right-click the entire cross-section: 'Reduce Cross-Section into Elements', Figure 2
- Selection of the corresponding elements or all point elements with the status ‘Insert’ by using the Views navigator, because it is only possible to define a material for them (in contrast to point elements with the ‘Remove’ status)
- Assign the corresponding material and confirm with OK, Figure 3
- Deactivation of visibility
- Select all elements and right-click one of the selected elements: 'Create Cross-Section from Selected Elements', Figure 4
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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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