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Instability
My model is unstable. What could be the reason?
Instability
My model is unstable. What could be the reason?
Question
What are the stiffness reduction factors k33 and k88 in the Multilayer Surfaces Add-on?
Effective Lengths for Steel Stability Design
How do I define effective lengths when designing steel members in RFEM 6?
Unsymmetrical Cross-Section (UPE)
I am having trouble with the design of a steel structure. For a singly symmetric cross-section (UPE), the program cannot perform the stability analysis. It reports that the Equivalent Member Method 6.3.3 is not applicable for an unsymmetrical cross-section. Is it possible to design such cross-sections in the program?
Adapted Method (Enable Double Bending)
I cannot analyze a UPN cross-section subjected to double bending in the program. Is it possible to do this in the program?
Member Design Supports for Deflection Checks
How do I define a member as a cantilever and not as supported at both ends for serviceability or deflection design?
Stress Ratio
The limit stress is activated, but my stress ratio is “non-designable” in the Stress-Strain Analysis add-on. What could be the reason?
Design of Member Sets
I have activated Steel Design in my model and defined design types for the members. Why can I not design the superordinate member set?
Overstrength Factors
How do I include the overstrength factor(s) Ωo in the ASCE 7 load combinations?
Unstable Model - Troubleshooting
My model in RFEM 6 / RSTAB 9 is unstable. How can I fix it?
Redundancy Factors
How do I include the redundancy factor(s) ρ in the ASCE 7 load combinations?
Exclude Lateral Torsional Buckling Check
My beam has a continuous lateral support and therefore lateral torsional buckling (LTB) is not a concern. How do I define the effective length?
Instability when Using Building Model with "Rigid Diaphragm"
I have a 3D model and try to split it up into "walls" and "surfaces" with the Building Model and to calculate them separately. However, my structural system becomes unstable then. What can be the reason?
AISI Table B4.1-1 Applicability Limits
Does RFEM check the applicability limits of AISI Table B4.1‑1?
Standardized Sections for AISI Design
Which standardized sections are valid for AISI cold-formed steel design in RFEM 6?
- 005113
- Timber Design for RFEM 6
- Timber Design for RSTAB 9
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- Aluminum Design for RFEM 6
- Aluminum Design for RSTAB 9
- Steel Design for RFEM 6
- Steel Design for RSTAB 9
- Stress-Strain Analysis for RFEM 6
- Stress-Strain Analysis for RSTAB 9
- Steel Joints for RFEM 6
- Timber Structures
- Concrete Structures
- Steel Structures
- Structural Analysis & Design
- Eurocode 2
- Eurocode 3
- Eurocode 5
- Eurocode 9
Materials of National Annexes
Where can I find the materials for the corresponding National Annexes in RFEM 6 and RSTAB 9?
Custom Sections for AISI Design
Can I design user-defined (parametric) sections according to AISI S100 or CSA S136?
Implausible Results – Torsional Warping
My results of the calculation with Torsional Warping are implausible. What could be the reason?
Analyse de déformation
Is it possible to display the deformation analysis of a surface (limit 0.5‰)?
Creating User-Defined Fabric
How do I create a user-defined fabric?
Equivalent Round Section Dimension
How is the dimension for an equivalent round section calculated in the Timber Design add-on?
Membrane Structures
Is it possible also to design membrane structures in RFEM?
Stability Analysis with Incrementally Increasing Loading
Can I incrementally increase the load in RFEM 6 or RSTAB 9?
Orthotropy Direction for Layers
Why cannot I define a rotation when defining layers?
CSA S16 Class 4 Sections
Can I design members with Class 4 sections according to CSA S16 in the Steel Design add-on?
Setting of I-Beam Flange Support for Design in Structure Stability Add-on
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?
Cable and Tensile Structures
I would like to analyze cable and tensile structures. Is it possible to use RFEM or RSTAB for this?
Programs for Timber Structures
Which Dlubal Software programs can I use to calculate and design timber structures?
- 005437
- RFEM 6
- RSTAB 9
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- Steel Design for RFEM 6
- Steel Design for RSTAB 9
- Steel Joints for RFEM 6
- Torsional Warping (7 DOF) for RFEM 6
- Torsional Warping (7 DOF) for RSTAB 9
- Steel Structures
- Structural Analysis & Design
- Stress Analysis
- Stability Analysis
- Warping Torsion Analysis
- Steel Connections
- Cold-Formed Sections
- Eurocode 3
- ANSI/AISC 360
- CSA S16
- IS 800
- GB 50017
- SP 63.13330
- BS 5950-1
- AS 4100
- SIA 263