Interesting customer projects realized with Dlubal structural analysis software.
RF-/STEEL NTC-DF Add-on Module for RFEM/RSTAB
Design of Steel Members According to Mexican Standard NTC-DF 2004
The RF-/STEEL NTC-DF add‑on module performs the ultimate and the serviceability limit state design of members and sets of members according to the standard:
- NTC‑RCDF (2004), Metal Structures Clause (Mexican standard)
- Cross-section designs of members and sets of members for tension, compression, bending, shear, torsion, and combined internal forces
- Stability analysis of buckling, torsional, and lateral-torsional buckling
- Automatic determination of critical buckling loads and critical buckling moments for general load applications and support conditions by means of a special FEA program (eigenvalue analysis) integrated in the module
- Alternative analytical calculation of the critical buckling moment for standard situations
- Optional application of discrete lateral supports to continuous members
- Automatic cross-section classification
- Serviceability limit state design (deflection)
- Cross-section optimization
- Wide range of cross-sections available, for example rolled I-sections, C-sections, T-sections, angles, rectangular and circular hollow sections, round steels, symmetrical and asymmetrical as well as parameterized I-sections, T-sections, and many others
- Clearly arranged input and result windows
- 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 window of member slenderness (optional) and governing internal forces
- Parts list with weight and solid specifications
- Seamless integration in RFEM/RSTAB
First, you have to select load cases, load combinations, and result combinations to be designed. It is also necessary to enter material, load and combination data in RFEM/RSTAB in compliance with the design concept specified by the standard NTC-RCDF (2004). The RFEM/RSTAB material library already contains materials relevant for the Mexican and American standard.
In the next input windows, you can adjust preset definitions of lateral intermediate supports, effective lengths, and other standard-specific design parameters. In the case of continuous members, it is possible to define individual support conditions and eccentricities for each intermediate node of single members. A special FEA tool determines critical loads and moments required for the stability analysis.
In connection with RFEM/RSTAB, it is possible to consider the effect of the general calculation according to the second-order analysis by default. Alternatively, you can create the second-order analysis effects by using enlargement factors.
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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Interesting customer projects realized with Dlubal structural analysis software.
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.
RF-/PLATE-BUCKLING Add-on Module for RFEM/RSTAB | Plate Buckling Analysis for Plates with or Without Stiffeners According to 1993-1-5
RFEM/RSTAB Add-on Module RF-IMP/RSIMP | Generation of Geometric Replacement Imperfections and Pre-deformed Replacement Structures
Extension of the RF-/STEEL Warping Erosion module | Lateral -torsional buckling analyzes of members according to the second -order theory with 7 degrees of freedom
RFEM/RSTAB add-on module RF-/TOWER effective lengths | Determination of effective lengths of lattice towers
RFEM/RSTAB add-on module RF-/JOINTS Steel-Column Base | Hinged and restrained column bases according to EC 3
RFEM/RSTAB add-on module RF-/STEEL BS | Design of steel members according to BS 5950 or BS EN 1993-1-1
RFEM add-on module RF-LOAD-HISTORY | Consideration of plastic deformations from previous load conditions
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.
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