- Full integration in RFEM/RSTAB including import of all relevant internal forces
- Intelligent presetting of flexural buckling-specific design parameters
- Automatic determination of the distribution of internal forces and classification according to DIN 18800, Part 2
- Optional import of buckling lengths from the RF-STABILITY/RSBUCK add-on module. For this, a comfortable graphical selection of the relevant buckling mode is possible
- Optimizing Cross-Sections
- Optional calculation according to both design methods of DIN 18800, Part 2
- Automatic determination of the most unfavorable design location, also for tapered members
- Check of c/t-limit values according to DIN 18800, Part 1
- Design of any thin-walled RFEM/RSTAB or SHAPE-THIN section for compression and bending without interaction according to the elastic-plastic method
- Design of I-shaped rolled and welded sections, I-like sections, box sections, and pipes subjected to bending and compression with iteration according to the elastic-plastic method
- Clearly arranged, comprehensible design checks with all intermediate values in the short and long forms
- Parts list of members and sets of members
- Direct export of all results to MS Excel
- A manual with manually calculated examples
Features
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The three types of moment frames (Ordinary, Intermediate, Special) are available in the Steel Design add-on of RFEM 6. The seismic design result according to AISC 341-22 is categorized into two sections: member requirements and connection requirements.
The Steel Design add-on in RFEM 6 now offers the ability to perform seismic design according to AISC 341-16 and AISC 341-22. Five types of seismic force-resisting systems (SFRS) are currently available.
The three types of moment frames (Ordinary, Intermediate, Special) are available in the Steel Design add-on of RFEM 6. The seismic design result according to AISC 341-16 is categorized into two sections: member requirements and connection requirements.
Moment frame design according to AISC 341-16 is now possible in the Steel Design add-on of RFEM 6. The seismic design result is categorized into two sections: member requirements and connection requirements. This article covers the required strength of the connection. An example comparison of the results between RFEM and the AISC Seismic Design Manual [2] is presented.
In a separate dialog box, you can specify extensive detailed settings for the design:
Design Method According to DIN 18800
- Design Method 1 According to El. (321)
- Design Method 2 According to El. (322)
Analysis method
- Elastic-Plastic according to DIN 18800
- Elastic-elastic according to a publication by Kretschmar, J./Österrieder, P./beirow, B.
Limit loading of general sections
- General sections – these include all cross-sections that cannot be assigned to single or double symmetric I-sections, box sections, or pipe sections – can also be designed according to the equivalent member method against flexural buckling. In this case, however, the plastic cross-section properties are determined without interaction conditions. The allowable application limits for this consideration depend on the ratio of the existing internal force to the fully plastic internal force. Five text boxes provide the option for user-defined control.
Check of limit (c/t)
- In this dialog section, you can activate or deactivate the check of c/t ratios.
Treatment of Result Combinations
- When designing a result combination, a result set is obtained due to the result superposition on each member location, which makes it impossible to clearly determine the moment factors. In this section, you can thus freely specify a global moment factor for a result combination design. The predefined values are on the safe side, regardless of the design method.
- Full integration in RFEM/RSTAB including import of all relevant internal forces
- Intelligent presetting of flexural buckling-specific design parameters
- Automatic determination of the distribution of internal forces and classification according to DIN 18800, Part 2
- Optional import of buckling lengths from the RF-STABILITY/RSBUCK add-on module. For this, a comfortable graphical selection of the relevant buckling mode is possible
- Optimizing Cross-Sections
- Optional calculation according to both design methods of DIN 18800, Part 2
- Automatic determination of the most unfavorable design location, also for tapered members
- Check of c/t-limit values according to DIN 18800, Part 1
- Design of any thin-walled RFEM/RSTAB or SHAPE-THIN section for compression and bending without interaction according to the elastic-plastic method
- Design of I-shaped rolled and welded sections, I-like sections, box sections, and pipes subjected to bending and compression with iteration according to the elastic-plastic method
- Clearly arranged, comprehensible design checks with all intermediate values in the short and long forms
- Parts list of members and sets of members
- Direct export of all results to MS Excel
- A manual with manually calculated examples
In the "Edit Section" dialog box, you can display the buckling shapes of the Finite Strip Method (FSM) as a 3D graphic.
- Design of five types of seismic force-resisting systems (SFRS) includes Special Moment Frame (SMF), Intermediate Moment Frame (IMF), Ordinary Moment Frame (OMF), Ordinary Concentrically Braced Frame (OCBF), and Special Concentrically Braced Frame (SCBF)
- Ductility check of the width-to thickness ratios for webs and flanges
- Calculation of the required strength and stiffness for stability bracing of beams
- Calculation of the maximum spacing for stability bracing of beams
- Calculation of the required strength at hinge locations for stability bracing of beams
- Calculation of the column required strength with the option to neglect all bending moments, shear, and torsion for overstrength limit state
- Design check of column and brace slenderness ratios
How do I define a plastic hinge in RFEM 6?
How can I exchange data between RFEM 6 / RSTAB 9 and IDEA StatiCa?
How can I generate an area load on members via cells in RFEM 6 or RSTAB 9?
In the Steel Design add-on, I have set the boundary conditions in such a way that the I-beam flange is restrained against the horizontal displacement. I then calculated the critical load factors using the Structure Stability add-on, but with no effect on the critical load factor value. What is the reason for this?
Can I estimate which minimum cross-sections I should use before starting to design my model?
How do I define a pipe as a shear key in RF‑/JOINTS Steel – Column Base add-on module?
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