RFEM - Structural FEA Software for Professionals
Useful Tools for Fast Generation of Structures
Further information
Software of Reference
"We are completely satisfied with RFEM and the Dlubal Software team too. Keep going!
Maderas Besteiro is in contact with many engineers and the structural wood research team at the University of Santiago de Compostela and they always speak of RFEM as the reference software."
Adolfo Montero
25 February 2015
Easy Modeling of Structures
"“It is really fun to work with Dlubal. The structure generation and modification can proceed smoothly:
- Manageability of functions in the menu and movability in space
- Data transparency: checks, options to modify and transfer data
I am pleased that I have switched to Dlubal! "
Dipl.-Ing. Hartmut Unterberg
27 March 2014
Useful auxiliary functions and tools for generation of structures including loads facilitate the modeling process. Member nonlinearities (creeping, tearing, slippage, friction, and others) are also possible as well as coupling or member and surface eccentricities.
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Cross-Section and Material Libraries Including Favorites
Extensive cross‑section and material libraries facilitate modeling of plate and beam structures. These libraries can be filtered and extended by user‑defined entries. It is possible to import and analyze special cross‑sections from SHAPE‑THIN and SHAPE‑MASSIVE.
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Combined and Hybrid Cross-Sections
It is possible to define combined timber cross-sections such as U-, T-, I- and box‑shaped beams. Single elements are connected by rigid or semi‑rigid connections. Furthermore, there are hybrid cross-sections available. In this case, a submenu provides an option to assign different materials to the individual cross‑section parts.
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Working with Layers
There are various tools such as the object snap, user‑defined input grids, and guidelines, which facilitate the graphical input of structural data. DXF files can be imported as line models or used as a layer in the background in order to use specific snap points.
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Useful Generating Tools
Generating tools to enter parametric models such as frames, halls, trusses, spiral stairways, arcs, or roofs. In addition, many generators allow for the creation of load cases and loading resulting from weight, snow, and wind.
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Optional Parametric Input
In order to work with recurring structural systems efficiently, RFEM provides the parameterized input, which can be combined with a parameterizable guideline method. Models can be created using particular parameters and adjusted to a new situation by modifying the parameters.
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Simple Selection According to Specific Categories
Various buttons allow you to directly change the perspective and work plane. By zooming, rotating and shifting the structure you can quickly adjust the appropriate view. Partial views represent specific structural parts clearly. Inactive objects can be displayed transparently in the background. By selecting structural elements according to special criteria, it is possible to group objects in a simple way.
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Easy Model Input
Structures are entered as 1D, 2D or 3D models. Member types, such as beams, trusses, or tension members, facilitate the definition of member properties. In order to model surfaces, RFEM provides various surface types, such as Standard, Orthotropic, Glass, Laminate, Rigid, Membrane, and others.
In addition, you can select various material models: Isotropic Linear Elastic, Isotropic Plastic 1D/2D/3D, Isotropic Nonlinear Elastic 1D/2D/3D, Orthotropic Elastic 2D/3D, Orthotropic Plastic 2D/3D (Tsai‑Wu 2D/3D), Isotropic Thermal‑Elastic, Isotropic Masonry 2D, and Isotropic Damage 2D/3D.
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Member and Support Nonlinearities
It is possible to specifiy nonlinearities of member end releases (yielding, tearing, slippage, etc.) and supports (including friction). For this, there are special dialog boxes available for determining the spring stiffness of columns and walls based on the geometry input.
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Variable Member and Surface Properties
Members can be arranged eccentrically, supported by elastic foundations, or defined as rigid connections. Sets of members facilitate load application on several members.
In RFEM, you can also define eccentricities of surfaces. Here, it is possible to transform nodal and linear loads into surface loads. It is also possible to divide surfaces in surface components and members in surfaces.
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Wind and Snow Load Generation According to ASCE/SEI 7-10
There are load generators available for beam structures, creating snow loads according to ASCE/SEI 7-10. The load cases are generated depending on the roof structure. Another generator creates coating loads (ice). You can save recurring load combinations as templates.
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Automatic Renumbering of Objects
The numbering of structural objects such as nodes and members can be adjusted subsequently. It is possible to renumber the objects automatically in accordance with the selected priorities (directions of axes).
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Simple Model Check
Members can be extended or divided graphically. The model check quickly detects entry errors such as identical nodes or double members and deletes them. When entering structural data, you can automatically connect intersecting members. The measure function allows you to determine lengths and angles of members and surfaces (only RFEM).
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Various Load Types
There are various load types available for member and surface loads (force, moment, temperature, precamber, and others). Member loads can be assigned to members, sets of members, and member lists. In the case of imperfections, inclination and precamber can be determined according to Eurocode or the American standard ANSI/AISC 360.
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Optional Regeneration of Model
It is possible to edit a model in the active rendering. The “Regenerate Model” function is useful when correcting slight deviations of node coordinates. Furthermore, it is possible to design round or angled surface corners (in order to reduce singularities in RFEM, for example).
Contact us
Do you have any questions about our products or need advice on selecting the products needed for your projects?
Contact us via our free e-mail, chat, or forum support or find various suggested solutions and useful tips on our FAQ page.
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Frequently Asked Questions (FAQ)
- For a tapered member, I get the error message "Invalid (incompatible) arrangement ...". What can I do?
- I have defined a wind profile for RWIND Simulation up to a height of 100 m. Is the wind profile dependent on the size of the wind tunnel?
- As part of my bachelor thesis, I would like to integrate the RSTAB printout report into LaTeX. There, you can completely integrate a PDF document as shown in the viewer. This also works with any PDF document, but not with the printout report created by RSTAB. What could be the reason?
- Does the program use different values of modulus of elasticity for different temperatures? How to activate it?
- How can I set the deformation coefficient kdef in the program?
- I would like to design an aluminum or lightweight structure. Is it possible to use RFEM or RSTAB for this?
- I would like to move some elements. When moving, my members are deleted, what is the reason?
- I am using COM interface and Grasshopper for the calculation of complicated structures. For this task I need to create NURBS lines. Could you explain how NURBS should be set? For example what kind of data should be provided for Knots?
- How do I activate the modeling of pipelines?
- How is the load distributed to the members in the angular axis method if members are excluded from the load application?
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