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- One software package for all application areas
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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.
With the RFEM & RSTAB add-on modules RF-STABILITY or RSBUCK, it is possible to perform eigenvalue analyzes for member structures in order to determine the effective length factors. The effective length coefficients can then be used for the stability design.
Digitization in construction is progressing with increasing dynamics. Structural engineers, a smaller group in the construction industry, are not always regarded as engineers who immediately jump on all new trains. Often for good reason. Not infrequently, this is the reason why topics such as the application of the BIM method are not yet the standard here. However, the past few years have shown that a rethink is beginning and new digital trends are openly absorbed and applied.
Both the determination of natural vibrations and the response spectrum analysis are always performed on a linear system. If nonlinearities exist in the system, they are linearized and thus not taken into account. Straight tension members are very often used in practice. How this can be approximated correctly in a dynamic analysis will be shown in this article.
Pay particular attention to connection points of members and surfaces when you deal with mixed systems because not all internal forces can always be transferred without difficulty at the coupling location.
The beam is resting on the column and the beam ends at the outer edge of the column. These requirements can be easily fulfilled in an architectural model with solids. In member analysis, simplified line models are used in which center lines meet in a common node. In this article, the influence of member eccentricities on the determination of internal forces is shown on three simple models.
In the existing standard, there were no regulations for the distribution of snow loads for elevated solar thermal and photovoltaic systems on roofs. It was only advised to distribute the loads. Only with the National Annex DIN EN 1991-1-3/NA: 2019-04, concrete rules have been taken for this.
When you perform the subsequent modeling of a beam under an existing floor, the first question arises which forces should be transferred between the downstand beam and the floor and whether a composite effect is the goal. In this case, the floor should rest on the downstand beam without any composite.
The design of cold-rolled steel products is defined in EN 1993-1-3. Typical cross-section shapes are channel, C, Z, top-hat, or sigma sections. These are cold-rolled steel products made of thin-walled sheet metal that has been cold-formed by roll-forming or bending methods. When designing the ultimate limit states, it is also necessary to ensure that local transverse forces do not lead to compression, crippling of the web or local buckling in the web of the sections. These effects can be caused by local transverse forces by the flange into the web as well as by support forces at the supported points. Section 6.1.7 of EN 1993-1-3 specifies in detail how to determine the resistance of the web Rw,Rd under local transverse forces.
In RFEM and RSTAB, you can use many interfaces to simplify the modeling of your structure. From background layers to the import of IFC objects that can be converted into members or surfaces, up to the import of the entire structural system from Revit or Tekla. Regardless of the performance of the selected interface, the further utilization also depends on the accuracy of the imported data.
Utilize the RF-/STEEL Cold-Formed Sections module extension to perform ultimate limit state designs of cold-formed sections according to EN 1993-1-3 and EN 1993-1-5. In addition to the cold-formed cross-sections from the cross-section database, you can also design general cross-sections from SHAPE-THIN.
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