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)
Customer Support 24/7
AnswerWhen modeling a glass pane, in particular, an insulating glass pane, special attention must be paid in RFEM that the boundary lines consist of only four lines.A division of the lines should be, if possible, avoided because then the calculation can no longer be performed. A corresponding warning message will be displayed before the calculation.If special intermediate nodes are required on the line, make sure that they do not divide the original line during the creation.If the line gets nevertheless divided, the structure can be restored by using the 'Delete Node and Connect Adjacent Members' command.In exceptional cases, the use of the layered mesh can be deactivated in the composition details. This option has been specifically implemented for double-curved panes.
In RF-GLAS, there are two different types of calculations. On the one hand, the so-called '2D' calculation. In this case, the glass structure is represented as a surface element. When considering the shear bond, an equivalent cross-section is determined using the laminate theory In contrast to this, there is the '3D' calculation. In this case, the layer structure is represented as a solid element in the calculation and thus the effectiveness of the stiffnesses between foil and glass is exactly determined when the shear bond is taken into account.
The RF-GLAS manual, Chapter 2, also provides further information on method of analysis.
AnswerYes, it is possible to create a new standard for which all values can be modified.This user-defined standard is saved so that it can be used again at any time.
AnswerIf there is an insulated glass unit selected for design in RF‑GLASS, the method of the large deformation analysis is set by default. Based on the existing gas volume in the space between glass panes, this method of analysis is also required and cannot be changed.
AnswerLoads from the whole structure are automatically considered for the design in RF‑GLASS if you select the global calculation type and the corresponding load case.In the case of the 'local' calculation type, the structural system is considered separately and thus the loads directly acting on the surface are only taken into account.Therefore, it is necessary to manually enter the loads from the supporting system in the case of this calculation type.
AnswerLike the other add-on modules, you can open the RF‑GLASS add‑on module from the Project navigator or the menu bar under Add-on Modules.In the module, you can then enter the data for the design.
Yes, you can define the required composition of the glass pane in Window '1.2 Layers'. In order to define the insulating glass, it is necessary to assign at least one glass layer to the composition. Then, you receive an additional option for the gas layer.
After entering the gas layer, additional tabs appear where you can enter further specific data for the design.
AnswerYes, it is possible to select the 'Laminated Safety Glass' check box in Window 1.2 Layers.As a result, the design value of the load-bearing capacity of the selected material is increased by 10 %.
By selecting the 'Thermally Toughened' check box, it is possible to consider the toughening for the ultimate limit state design (see the figure). If you select this option, Formula (2) (8.3.6/DIN18008‑1:2010‑12) will be used; otherwise Formula (3) applies.
When selecting the material, it is preselected by default, but can be be adjusted by user-defined settings.
AnswerIn the settings for the standard (DIN 18008), the construction coefficient kc can be user-defined.In Chapter 8.3.6 (DIN18008‑1:2010‑12), this factor is given as 1.0, if no other parts of the standard are to be followed.Especially in the case of linearly supported glass, Chapter 7.2 (DIN18008‑2: 2010‑12). gives the factor of 1.8 for normal glass and 1.0 for toughened glass.
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.
“Thank you very much for the useful information.
I would like to pay a compliment to your support team. I am always impressed how quickly and professionally the questions are answered. In the industry of structural analysis, I use several software including service contract, but your support is by far the best.”