RF-/STEEL NBR Add-on Module for RFEM/RSTAB
Design of Steel Members According to Brazilian Standard ABNT NBR 8800:2008
The RF-/STEEL NBR add‑on module performs the ultimate and the serviceability limit state design of steel members and sets of members according to:
- ABNT NBR 8800:2008 (Brazilian standard)
- Design of tension, compression, bending, shear, combined internal forces, and torsion
- Stability analysis for flexural buckling, torsional buckling, and lateral-torsional buckling
- Optional application of discrete lateral supports to beams
- Deformation analysis (serviceability)
- Cross-section optimization
- Wide range of cross-sections available, for example rolled I-sections, C-sections, rectangular hollow sections, angles and T-sections. Welded sections: I‑shaped (symmetrical and asymmetrical about major axis), channel sections (symmetrical about major axis), rectangular hollow sections, angles, round pipes and round bars
- Clearly arranged result tables
- Detailed result documentation including references to design equations of the used standard
- Various filter and sorting options of results including result lists by member, cross-section, x-location, or by load cases, load and result combinations
- Result table of member slenderness and governing internal forces
- Parts list with weight and solid specifications
- Seamless integration in RFEM/RSTAB
It is necessary to enter material, load and combination data in RFEM/RSTAB in compliance with the design concept specified by Brazilian standard ABNT NBR 8800:2008. The RFEM/RSTAB material library already contains relevant materials.
The RF-/STEEL NBR add-on module requires members and sets of members as well as load cases, load combinations, and result combinations to be designed.
In the subsequent input windows, you can adjust preset definitions of lateral intermediate supports and effective lengths.
The first result window shows the maximum design ratios including the corresponding design of each designed load case, load combination, or result combination.
The other result windows list all detailed results sorted by specific subject in extendable tree menus. All intermediate results along a member can be displayed at any location. In this way, you can easily retrace how the module has performed the individual designs.
Complete module data is part of the RFEM/RSTAB printout report. You can select the report contents and extent specifically for the individual designs.
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In RF-/STEEL EC3, the Window 1.4 Lateral Intermediate Supports offers you the option to define lateral intermediate supports at individual members. These supports are created from connected purlins and horizontal beams, for example, and increase the resistance against lateral-torsional buckling. Lateral intermediate supports can be entered either with a relative or an absolute distance.
SHAPE-THIN determines the effective cross-sections according to EN 1993-1-3 and EN 1993-1-5 for cold-formed sections. You can optionally check the geometric conditions for the applicability of the standard specified in EN 1993‑1‑3, Section 5.2.
The effects of local plate buckling are considered according to the method of reduced widths and the possible buckling of stiffeners (instability) is considered for stiffened sections according to EN 1993-1-3, Section 5.5.
As an option, you can perform an iterative calculation to optimize the effective cross-section.
You can display the effective cross-sections graphically.
Read more about designing cold-formed sections with SHAPE-THIN and RF-/STEEL Cold-Formed Sections in this technical article: Design of a Thin-Walled, Cold-Formed C-Section According to EN 1993-1-3.
- I design a cross-section created in the SHAPE‑THIN program by using the design add-on module, but the program shows the error message "ER006 Invalid type of c/t-part for cross-section of type General." What can I do?
- In RF‑/STEEL EC3, I get an error message saying that the node with a support does not exist in the set of members. What is the reason?
- How do I display some results of all load cases in the printout report, but other results of the selected load cases only?
- Is it also possible to subsequently deactivate the symbols for the FE mesh refinement in an existing graphic in a printout report?
- What is the difference between SHAPE‑THIN 9 and SHAPE‑THIN 8?
- SHAPE‑THIN calculates a very small shear area. Why?
- When calculating a connection using the FRAME‑JOINT Pro add-on module, a message appears saying that the value is out of the valid range (existing value: 108, minimum value 100, maximum value 100). What does this message mean?
- I have a trapezoidal roof structure supported by beams. However, the moments on the beams are smaller than they should be. What could be the reason for this?
- How can I export the effective lengths from the RF‑STABILITY add-on module to Excel?
- In the RF‑/STEEL EC3 add-on module, I have selected two bracings with the same size as the shear panel type in the "Parameters" window for a beam to be designed. Thus, the beam should be supported laterally in the middle. Why is the eigenvector arbitrary anyhow?
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