In the Knowledge Base, you’ll find technical articles and tips & tricks that may help you with your design using Dlubal Software.
Frequently Asked Questions (FAQ)
FAQ 002371 EN Modeling | Loading RFEM RSTAB
AnswerThe prerequisite for using both generators for wind and snow load are that you are working with the 3D model type because when working with a 2D model type, the program does not have the corresponding geomtrical parameters.The model type has to be set in the "Edit Model - General Data" dialog box. The dialog is opened by right-clicking "Model Data", "General Data" in the Project Navigator - Data. The modeling may have to be adapted.
FAQ 002361 EN Modeling | Loading RFEM RSTAB
AnswerTo take into account external concentrated loads that act eccentrically on a member, it is possible to model a connection via a rigid member. The rigid member is connected perpendicularly to the corresponding member, and the length of the rigid member corresponds to the value of the eccentricity.Alternatively, the corresponding torsional moment, which is a result of the eccentric load introduction, could be entered as external loading. This way, it would not be necessary to define a rigid member and the corresponding eccentricity would still have been taken into account.
FAQ 002126 EN Modeling | Loading 5.xx 8.xx
RFEM/RSTAB provides a load generator for snow and wind loads according to DIN, EN, and CTE, under "Tools" -> "Generate Loads".
For models that do not comply with the preset standard concept, you can create a load specification by using the regular loads (for example member loads from surface loads).
In RFEM, I have split a member in surfaces. How should I change the previously applied member load to affect the surface after splitting the member in surfaces?
FAQ 002111 EN Modeling | Loading RFEM 5.xx
If a member is separated into surfaces, member loads cannot be used anymore. In this case, the easiest way is to create a line on the load introduction point and put a line load on it. You can simply copy the member load parameter from input tables and paste it in the table of line load.
FAQ 002038 EN Modeling | Loading RFEM RSTAB 5.xx 8.xx
Due to calculation designs to be performed (cross-section, stability, serviceability limit state design etc.), it is not possible to determine favourable load situations of a structural component or an entire model in advance.
However, there is an algorithm available for RFEM and RSTAB, which develops all possible load constellations for entered load cases according to a specific standard criterion (superposition of loads in load combinations or superposition of results in result combinations). These constellations include each eventuality resulting from variably acting load cases. Design using this combination package guarantees consideration of the governing combination. You can activate the combinatorics in General Data under "Classification of Load Cases and Combinations".
I have generated a trapezoidal area load. When displaying the load separately, I can see only constant loads on members. What happened and can I change that?
FAQ 002031 EN Modeling | Loading RFEM RSTAB 5.xx 8.xx
The reason is that the "Correction of Generated Loads" is inactive and thus, only intermediate values are determined. To change that, select the "According to moment equilibrium of total loads and generated member loads" option in detail settings of the load generator (see picture).
For more information about load correction, see RFEM/RSTAB manual, Chapter 11.8.1.
FAQ 002008 EN Modeling | Loading RFEM 5.xx
AnswerAs of the version 5.03, there is a new load type - free variable load. Using this load type, you can apply variable load along the perimeter when specifying rotation axis. At the same time, you can separate the perimeter in several segments.
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