The structural analysis software RFEM 6 is the basis of a modular software system. The main program RFEM 6 is used to define structures, materials, and loads of planar and spatial structural systems consisting of plates, walls, shells, and members. The program also allows you to create combined structures as well as to model solid and contact elements.
RSTAB 9 is a powerful analysis and design software for 3D beam, frame, or truss structure calculations, reflecting the current state of the art and helping structural engineers meet requirements in modern civil engineering.
Do you often spend too long calculating cross-sections? Dlubal Software and the RSECTION stand-alone program facilitate your work by determining section properties of various cross-sections and performing a subsequent stress analysis.
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Saving Graphic Template
Once you have assigned the concrete material and activated the design properties in the member input dialog box, the display of the reinforcement layout for the selected member is available.
In the Display Reinforcement Layout window, you can proceed as follows. 1. Use the options in the menu bar to customize the display according to your preferences. 2. This configuration can send "Directly to a printer" as a template.3. When saving the template, it is stored globally and is also available for future models.
Multi Print of Reinforcement Layout for Selected Members
Use this graphic template to print the reinforcement of any members with a similarly formatted reinforcement layout in a multi print.
In the RSECTION program, you can analyze general steel or aluminum cross-sections and determine the effective section properties. For this, you need the Effective Sections program extension of RSECTION. If you have licensed this add-on, you can activate the Effective Section option for the calculation in the Base Data of the cross-section.
Then, define the standard according to which the calculation should be performed. Currently, the following options are available:
The effective section properties depend on the internal forces of the cross-section. Therefore, create a load case and define one or more internal force constellations.
After the calculation, the effective section properties are displayed in the table. In the graphic, you can check the stresses on the effective section.
Once you have saved the cross-section, you can import it into RFEM or RSTAB to use it for further analyses.
The webinar Determination of Section Properties and Stress Analysis in RSECTION shows the modeling and calculation of a cold-formed section. You can find further information there.
Both RFEM and RSTAB are ideally suited for modeling and analysis of cable and tensile structures, including substructures. You can decide whether to consider the prestress of cables.
Main Programs RFEM and RSTAB
The main programs RFEM and RSTAB are used to define the model with its properties and actions. In addition to spatial frame and truss structures, you can also use RFEM to model plate, wall, and shell structures. Thus, RFEM proves to be the more versatile option.
Add-ons for Cable Structures
Various add-ons supplement the functionality of the main programs. In the design add-ons Steel Design and Aluminum Design, you can perform the ultimate and serviceability limit state design, as well as the stability analysis according to various standards.
The Form-Finding add-on for RFEM provides you with the option to perform form-finding for cable and membrane systems before the actual design.
In case of any questions about the Dlubal solution for cable and tensile structures, our sales team will be happy to assist you.
If line hinges are to be defined on several boundary lines of surfaces at the same time, the following procedure is recommended:
Update: It is not necessary to click the "+" sign. After selecting a surface and the corresponding lines, you can simply select the next surface and the corresponding lines, and so on.
Where the geometries become complicated, it is difficult to use analytical methods for the design. The weld elements in RFEM 6 are particularly helpful for such applications.
RFEM 6 allows for design checks for different types of welds.
In the Joint type list, you can select how the surfaces to be connected are related to each other.
Then, select a weld type.
Finally, it is necessary to define the weld parameters.
The welds do not affect the stiffness of the model. You use the stresses from the surface elements and evaluate them according to the regulations.
It can happen that all design checks are fulfilled for a particular member or set of members, but a "Not Covered Reinforcement" result is still output. See also Image 01 and Image 02.
The reason for this is that the distribution of the "Provided Reinforcement" on the upper and lower positions is generated from the rebar arrangement within the cross-section.
The rebars above the center of gravity are assigned to the "upper position" and the rebars below the center of gravity are assigned to the "lower position". This means that the distribution of the "Provided Reinforcement" does not consider the actual distribution of the zero line within the cross-section, and checks which rebar is actually in the tension zone.
However, the actual distribution of the zero line within the cross-section is checked during the design. Thus, the rebars that have been geometrically assigned to the "lower reinforcement" (the provided reinforcement distribution) can be mathematically assigned to the tension reinforcement. This can be seen in Image 03. The rebars marked in red have been assigned geometrically to the lower reinforcement. However, the stress distribution within the cross-section shows that they are also subjected to tension and apply to the design checks accordingly. In the design, all members (marked in red and green in Image 03) are applied. Therefore, all the design checks are fulfilled at this location, although the distribution of the "Not Covered Reinforcement" suggests otherwise.
Yes, this is possible in RFEM 6.First, check whether there is a printer with the DIN A0 format available in the Windows control panel. If so, this printer is available in the printer settings in RFEM 6.
You can find an example with a printout report in the DIN A0 format under Downloads.
The punching results can also be found in the Results navigator.The results are divided into the design checks "On Nodes" and the reinforcement "On Nodes".The punching loads as well as the distribution of the shear forces at the critical perimeter (smoothed and unsmoothed) are the intermediate results of the design checks and are arranged accordingly in this part of the navigator.
No, this is not possible in the current state of development of RFEM 6.
See also the FAQ for RFEM 5 and RF‑CONCRETE Surfaces by clicking the link below.The design concept is currently structured similarly and is based on the reinforcement on the top and bottom sides.
Yes, you can.
To do this, open the settings for the "Concrete Design" add-on. You will find the setting here for switching from "mesh nodes" to "grid points".