Frame Analysis Software RSTAB 9 | Modeling
Useful Tools for Fast Generation of Structures
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- Manageability of functions in the menu and movability in space
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Useful auxiliary functions and tools for generating snow and wind loads, etc. facilitate the modeling process. Member and hinge nonlinearities (yielding, tearing, slippage, etc.) are possible, as well as couplings or member eccentricities.
Extensive cross‑section and material libraries facilitate modeling of plate and beam structures. These databases can be filtered and expanded with user-defined entries. You can also import and analyze special sections from RSECTION.
User-defined views from different angles facilitate the evaluation of results. By using "visibilities", you can divide the model into user-defined and generated partial views that fulfill certain criteria. It is thus possible, for example, to only activate the surfaces of a specific material or members with a particular cross-section for the display.
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 types, such as Standard, Without Thickness, Rigid, Membrane, and Load Distribution.
In addition, RFEM allows you to choose between different material models such as Isotropic | Linear Elastic or Orthotropic | Linear Elastic.
To efficiently manage recurring systems, the parameterizable input is a good choice. Models can be created using particular parameters and adjusted to a new situation by modifying the parameters.
You can specify nonlinearities such as yielding, friction, tearing, slippage, and so on, for member hinges and supports. There are special dialog boxes available for determining the spring stiffnesses of columns and walls based on the geometry specifications.
Members can be arranged eccentrically, supported by elastic foundations, or defined as rigid links. Member sets facilitate the 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. You can divide surfaces into surface components and members into surfaces.
Load wizards for generating wind loads according to EN 1991-1-4 and snow loads according to EN 1991-1-3 (as well as other international standards) are available for plate and frame structures. The load cases are generated depending on the roof shape.
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).
The model check quickly detects input errors such as overlapping members or identical nodes. You can automatically connect intersecting members during the input. Members can be extended or divided graphically. The measuring function allows you to determine the lengths and angles of members and surfaces (RFEM only).
There are various load types available for member and surface loads (force, moment, temperature, precamber, and so on). Member loads can be assigned to members, member sets, and member lists. In the case of imperfections, inclination and precamber can be determined according to ANSI/AISC 360, CSA S16, the Eurocode, and so on.
Do you have any questions about our products or which are best suited for your design projects? Contact us via phone, email, or chat or find suggested solutions and useful tips on our FAQ page available 24/7.
This technical article presents some basics for using the Torsional Warping add-on (7 DOF). It is fully integrated into the main program and allows you to consider the cross-section warping when calculating member elements. In combination with the Stability Analysis and Steel Design add-ons, it is possible to perform the lateral-torsional buckling design with internal forces according to the second-order analysis, taking into account imperfections.
- Can I define a different bar size in the RFEM 6 Concrete Design add-on other than the default bar sizes available in the drop-down?
- Can the RFEM 6 Concrete Design add-on automatically design member and surface reinforcement?
- Where can I find the calculation parameters to be set?
- How can a model be regenerated or where can I adjust the model tolerances?
- How can I deactivate the consideration of shear stiffness for a cross-section calculation?
- What is the reason for changing the colors for compression and tension in RFEM 6 and RSTAB 9 with respect to previous program versions? Since then, compression was red and tension was blue.
- When analyzing the combinations using the geometric linear method, it seems that the parallel calculation works.However, when I change the method to the second-order analysis, it seems that the solver calculates the combinations one by one.
- My model in RFEM 6 is unstable. How can I fix it?
- Do I have to rewrite my own tools created with RF‑COM, for example, to enter models in RFEM 6?
- Is the import from Microsoft Excel still available in RFEM 6 and RSTAB 9?