Your options in timber design are diverse. You can consider cut-to-grain angles, transverse tension stresses, and volume-dependent radii of curvature for tapered and curved members. To design the area of the grain cut, the strength is adjusted accordingly in the case of bending tension or bending pressure. In order to also allow you to perform a stability analysis with the equivalent member method, the height to determine the effective and lateral-torsional buckling lengths is set at a distance of 0.65 × h to the actual design point.
Timber Design | Design of Tapered and Curved Members
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Using the Timber Design add-on, timber column design is possible according to the 2018 NDS standard ASD method. Accurately calculating timber member compressive capacity and adjustment factors is important for safety considerations and design. The following article will verify the maximum critical buckling strength calculated by the Timber Design add-on using step-by-step analytical equations as per the NDS 2018 standard including the compressive adjustment factors, adjusted compressive design value, and final design ratio.
The Geotechnical Analysis add-on provides RFEM with additional specific soil material models that are able to suitably represent complex soil material behavior. This technical article is an introduction to show how the stress-dependent stiffness of soil material models can be determined.
This article shows how to create cross-sections using DXF files.
When calculating regular structures, data input is often not complicated but time-consuming. Input automation can save valuable time. The task described in the present article is to consider the stories of a house as single construction stages. Data is entered using a C# program so that the user does not have to enter the elements of the individual floors manually.
![RSTAB 9 results - warping moment Momega [kNm]](/en/webimage/047737/3730153/MTsec.png?mw=350&hash=40c7b896b7ecb6c898b763109dcec0b2a330f9f4)
![RSTAB 9 results - secondary torsional moment MTsec [kNm]](/en/webimage/047736/3730151/MTsec.png?mw=350&hash=40c7b896b7ecb6c898b763109dcec0b2a330f9f4)
![RSTAB 9 results - primary torsional moment MTpri [kNm]](/en/webimage/047735/3730144/MTpri.png?mw=350&hash=2363903e71565c33f1897548cd3f9920f0bc53ba)
![RSTAB 9 results - torional moment MT [kNm]](/en/webimage/047734/3730141/MT.png?mw=350&hash=74333d59da248f9107e5ddaca75765b9666580c3)
- Arbitrary definition of the charring time
- Option to calculate with or without adhesion of the layer for surface structures (cross-laminated timber)
- Free user-defined specification of the fire parameters
- Consideration of Different Effective Lengths in Fire Resistance Design
- Optional design "Compression perpendicular to grain"
- Graphical result display integrated in RFEM/RSTAB, such as a design ratio
- Complete integration of the results into the RFEM/RSTAB printout report
Your options in timber design are diverse. You can consider cut-to-grain angles, transverse tension stresses, and volume-dependent radii of curvature for tapered and curved members. To design the area of the grain cut, the strength is adjusted accordingly in the case of bending tension or bending pressure. In order to also allow you to perform a stability analysis with the equivalent member method, the height to determine the effective and lateral-torsional buckling lengths is set at a distance of 0.65 × h to the actual design point.
Here you have a free choice. You can perform the support pressure design at any point for the loading in the y- and z-directions of a cross-section. You are free to differentiate between inner and outer supports. A factor kc,90 for the pressure perpendicular to the grain can be user-defined (for example, 1.75 for glued-laminated timber). If allowed, the support length is increased automatically according to the standard specifications. This allows you to achieve a more efficient design with minimum effort.
There is often no fire resistance design for the lateral supports of a structure. Would you like to handle this differently in your project? In order to consider this in the calculation, you can define other equivalent member lengths for the fire situation.
How can I generate an area load on members via cells in RFEM 6 or RSTAB 9?
How can I define temporary supports for a form-finding process in RFEM& 6?
Which programs do I need for laminate and sandwich structures, or cross-laminated timber (CLT)?
Which Dlubal Software programs can I use to calculate and design timber structures?
Where can I find the support chat for quick assistance on the Dlubal website?
How can I create a model template in RFEM 6?
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