- More than 25,000 users in 71 countries
- One software package for all application areas
- Short learning time and intuitive handling
- Service provided by experienced engineers
- Excellent price/performance ratio
- Flexible modular concept, extensible according to your needs
- Scalable license system with single and network licenses
- Proven software used in many well-known projects
Useful Program Features
Dlubal Software programs and add-on modules include a wide range of powerful features.
Since our software is subject to continuous development, we are constantly adding new features. In doing so, we also take account of our customers' wishes.
Why Dlubal Software?
Calculation of stiffened buckling panels according to EN 1993-1-5, 4.5In SHAPE-THIN 8, the effective cross-section of stiffened buckling panels can be calculated according to EN 1993-1-5, Cl. 4.5. The critical buckling stress is calculated according to EN 1993-1-5, Annex A.1 for buckling panels with at least 3 longitudinal stiffeners or according to EN 1993-1-5, Annex A.2 for buckling panels with one or two stiffeners in the compression zone. The design for torsional buckling safety is also performed.
Material Library with Steels According to the Australian Standard AS/NZS 4600:2005The material database in RFEM, RSTAB and SHAPE-THIN contains steels according to the Australian standard AS/NZS 4600:2005.
RF-/STEEL | Features
- General stress analysis
- Automatic import of internal forces from RFEM/RSTAB
- Complete graphical and numerical results of stresses and stress ratios integrated in RFEM/RSTAB
- Various options to adjust graphical results for evaluation
- Flexible design in multiple design cases
- Clearly arranged result tables for quick overview available immediately after design
- High efficiency due to the minimum of data required for input
- Flexibility due to detailed settings of parameters and extent of calculation
Features of RF-/STEEL Members
- Cross-section optimization
- Transfer of optimized cross-sections to RFEM/RSTAB
- Design of any thin-walled cross-section from SHAPE-THIN
- Representation of stress diagram on a cross-section
- Determination of normal, shear, and equivalent stresses
- Stress results of individual internal forces types
- Detailed representation of stresses in all stress points
- Determination of the maximum Δσ for each stress point (for fatigue design, for example)
- Colored display of stresses and stress ratios facilitating quick overview of crucial or oversized zones
- Parts list and quantity surveying
Features of RF-STEEL Surfaces (available in RFEM only)
- Determination of principal and basic stresses, membrane and shear stresses as well as equivalent stresses and equivalent membrane stresses
- Stress analysis for structural parts of almost any shape
- Equivalent stresses calculated according to different approaches:
- Shape modification hypothesis (von Mises)
- Maximum shear stress criterion (Tresca)
- Maximum principal stress criterion (Rankine)
- Principal strain criterion (Bach)
- Optional optimization of surface thicknesses and data transfer to RFEM
- Serviceability limit state design by checking surface displacements
- Detailed results of individual stress components and ratios in tables and graphics
- Filter function for surfaces, lines, and nodes in tables
- Transversal shear stresses according to Mindlin, Kirchhoff, or user-defined specifications
- Parts list of designed surfaces
RF-/STEEL | Input
In order to facilitate the data input, there are surfaces, members, sets of members, materials, surface thicknesses, and cross-sections preset. It is possible to select the elements graphically using the [Select] function. The program provides access to the global material and cross-section libraries.
Load cases, load combinations, and result combinations can be combined in various design cases.
Combination of surface and member elements and separate designs allow you to model and analyze only the critical areas such as frame joints by surface elements. The other parts of the model can be designed by member analyses.
RF-/STEEL | Results
After the calculation, the module displays the maximum stresses and stress ratios sorted by cross-section, member or surface, set of members, and x-location. In addition to the result values in tables, the corresponding cross-section graphic including stress points, stress diagrams, and values is displayed as well. The stress ratio can refer to any kind of stress type. The current location is highlighted in the RFEM/RSTAB model.
In addition to the result evaluation in the module, it is possible to represent the stresses and stress ratios graphically in the RFEM/RSTAB work window. It is possible to individually adjust the colors and values.
Result diagrams of a member or set of members facilitate targeted evaluation. Furthermore, you can open the respective dialog box of each design location to check the design-relevant cross-section properties and stress components of all stress points. It is possible to print the corresponding graphic including all design details.
RF-/STEEL EC3 | Features
- Import of materials, cross-sections, and internal forces from RFEM/RSTAB
- Steel design of thin‑walled cross‑sections according to EN 1993‑1‑1:2005 and EN 1993‑1‑5:2006
- Automatic classification of cross-sections according to EN 1993-1-1:2005 + AC:2009, Cl. 5.5.2, and EN 1993-1-5:2006, Cl. 4.4 (cross-section class 4), with optional determination of effective widths according to Annex E for stresses under fy
- Integration of parameters for the following National Annexes:
- BS EN 1993-1-1/NA:2008-12 (United Kingdom)
- ÖNORM 1993-1-1:2007-02 (Austria)
- NBN EN 1993-1-1/ANB:2010-12 (Belgium)
- BLG EN 1993-1-1/NA:2008 (Bulgaria)
- CYS EN 1993-1-1/NA:2009-03 (Cyprus)
- CSN EN 1993-1-1/NA.ed:2007-05 (Czech Republic)
- DS/EN 1993-1-1 DK NA:2015 (Denmark)
- SFS EN 1993-1-1:2005 (Finland)
- NF EN 1993-1-1/NA:2007-05 (France)
- DIN EN 1993-1-1/NA:2015‑08 (Germany)
- ELOT EN 1993-1-1 (Greece)
- UNI EN 1993-1-1/NA:2008 (Italy)
- LST EN 1993-1-1/NA:2009-04 (Lithuania)
- LU EN 1993‑1‑1:2005/AN‑LU:2011 (Luxembourg)
- MS EN 1993-1-1:2010 (Malaysia)
- NEN EN 1993-1-1/NA:2011-12 (Netherlands)
- NS EN 1993-1-1/NA:2008-02 (Norway)
- PN EN 1993-1-1:2006-06 (Poland)
- NP EN 1993-1-1/NA:2010-03 (Portugal)
- SR EN 1993-1-1:2006/NA:2008-04 (Romania)
- SS EN 1993-1-1/NA:2010 (Singapore)
- STN EN 1993-1-1/NA:2007-12 (Slovakia)
- SIST-EN 1993-1-1/NA:2006-03 (Slovenia)
- UNE EN 1993-1-1:2013-02 (Spain)
- SS EN 1993-1-1/NA:2011-04 (Sweden)
In addition to the National Annexes (NA) listed above, you can also define a specific NA, applying user-defined limit values and parameters.
- Automatic calculation of all required factors for the design value of the flexural buckling resistance Nb,Rd
- Automatic determination of the ideal elastic critical moment Mcr for each member or set of members on every x-location according to the Eigenvalue Method or by comparing moment diagrams. You only have to define the lateral intermediate supports.
- Design of tapered members, unsymmetric sections or sets of members according to the General Method as described in EN 1993-1-1, Cl. 6.3.4
- In the case of the General Method according to Cl. 6.3.4, optional application of 'European lateral-torsional buckling curve' according to Naumes, Strohmann, Ungermann, Sedlacek (Stahlbau 77 (2008), p. 748‑761)
- Rotational restraints can be taken into account (trapezoidal sheeting and purlins)
- Optional consideration of shear panels (trapezoidal sheeting and bracing)
- Module extension RF-/STEEL Warping Torsion (the licence is required) for stability analysis according to the second‑order theory as stress analysis, including consideration of 7th degree of freedom (warping)
- Module extension RF-/STEEL Plasticity (the licence is required) for plastic analysis of cross‑sections according to Partial Internal Forces Method (PIFM) and Simplex Method for general cross‑sections (in connection with the RF‑/STEEL Warping Torsion module extension, it is possible to perform the plastic design according to the second‑order analysis)
- ULS design: Selection of fundamental or accidental design situations for each load case, load combination, or result combination
- SLS design: Selection of characteristic, frequent, or quasi-permanent design situations for each load case, load combination, or result combination
- Tension analysis with definable net cross-section areas for member start and end
- Weld designs of welded cross-sections
- Optional calculation of warp spring for nodal support on sets of members
- Graphic of design ratios on cross-section and in RFEM/RSTAB model
- Determination of governing internal forces
- Filter options for graphical results in RFEM/RSTAB
- Representation of design ratios and cross‑section classes in the rendered view
- Color scales in result windows
- View mode for view adjustment in the work window
- Automatic cross-section optimization
- Transfer of optimized cross-sections to RFEM/RSTAB
- Parts list and quantity surveying
- Direct data export to MS Excel
- Verifiable printout report
- Possibility to include the temperature curve in the report
RF-/STEEL EC3 | Design
When performing design of tension, compression, bending, and shear loading, the module compares design values of the maximum load capacity with the design values of actions.
If the components are subjected to both bending and compression, the program performs an interaction. RF-/STEEL EC3 provides options for determining interaction formulas by factors of the first method (Annex A) or the second method (Annex B).
The flexural buckling design, requires neither the slenderness nor the elastic critical buckling load of the governing buckling case. The module automatically determines all required factors for the design value of the bending load and the ideal elastic critical moment for each member on every x-location of the cross-section. If required, you only need to specify lateral intermediate supports of the individual members/sets of members, definable in one of the input windows.
If members are selected for the fire resistance design in RF-/STEEL EC3, there is another input window available where you can enter additional parameters such as types of coating or covers. Global settings covers required time of fire resistance, temperature curve, and other coefficients. The printout report lists all intermediate results and the final result of the fire resistance design. Furthermore, it is possible to print the temperature curve in the report.
RF-/STEEL EC3 | Results
The results sorted by load case, cross-section, member, set of members, or x-location are displayed in clearly arranged result windows. By selecting the corresponding table row, detailed information about the performed design is displayed.
The results include a comprehensible list of all material and cross-section properties, design internal forces, and design factors. Furthermore, it is possible to display distribution of internal forces of each x-location in a separate graphic window.
Parts lists by member/by set of members for the individual cross-section types complete the detailed and structures result presentation. To print the input and result data, you can use the global RFEM/RSTAB printout report.
For further processing of various data, it is possible to export all tables to MS Excel.
Do you have any questions or need advice?
Contact us or find various suggested solutions and useful tips on our FAQ page.
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