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FAQ 003525 | Can I use RFEM to calculate a log house three-dimensionally?
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Can I use RFEM to calculate a log house three-dimensionally?Answer
For many users, the very realistic display of a building in construction programs arouses the wish to carry out the structural analysis of the building with the same complex spatial model.
Again and again, the design of log cabins is approached to us. Unfortunately, this attractive construction method is relatively complex for three-dimensional analysis. In dimensioning, there are some critical questions that cannot be answered.
- Which sorting class is the timber subject to? In a log house, unsorted damp wood is often used.
- How is the contact between the timber types controlled? Diamond notch, connection with moving timbers, and so on?
- Have mullions been installed? Which type of timber and how are they supported horizontally?
- Which dimensions does the timber have? In a log structure, a grown trunk can often be integrated. These trunks do not have uniform dimensions as the nature cannot be put into a grid.
- How is it possible to consider the contact between two timber layers?
Furthermore, log houses are common for the houses with the maximum of 2 full floors because of their high placement of more than 15 cm per story. Thus, the occurring forces are within a manageable framework and can be determined sufficiently precisely with the methods of the structural analysis for members in 2D structures. In RFEM/RSTAB, there is an option to define round members in a tapered way for this purpose. Thus, the definition of 2D equivalent systems can be done much faster in RFEM/RSTAB.
There is some information in the given literature source.
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Dlubal FAQ Spatial Log Tapered Frequently Asked Question FAQ about Dlubal Question and Answer about Dlubal
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Considering the Joint Slip in Parametric Timber Cross-Sections
In timber design, beams are often built up of several timber elements. The individual elements can be connected by glue, nails, bolts, or dowels. A glued connection is to be assumed as rigid. In the case of dowel‑type fasteners, the joint is compliant (slip joint) and the cross‑section properties of the connected elements cannot be fully applied.
RF-COM/RS-COM | Scope of Functions
- Reading and writing access to structural data, load case data, load and result combinations, and calculation results
- External control of calculation
- Possibility to open and edit available models or to create new models
- Access to all results such as deformations, internal forces, and support reactions
- Ability to intercept possible errors using error messages
- Access to control elements as well as results of the following programs:
- RF-/STEEL
- RF-/STEEL EC3
- RF-/ALUMINUM
- RF-/CONCRETE
- RF-STABILITY
- RX-TIMBER Glued-Laminated Beam
- RF-/TIMBER Pro
- RF-/DYNAM Pro
- SUPER-RC
- Can I use RFEM to calculate a log house three-dimensionally?
- How can I create a curved or curved section?
- How are the signs to be interpreted for the release results of the line release and line hinges?
- After the design with RF-/TIMBER Pro, I had a cross-section optimized. Why is the utilization of the optimized cross -section now exceeded?
- Is it possible to design the support pressure or the sleeper pressure in RX-TIMBER?
- Why are the stresses of the 90 ° orientation not displayed in RF-LAMINATE for a layer with the orthotropic direction 90 ° for σb, 90?
- How can I get the member end forces to design the connections?
- I design timber components. The deformations of load combinations deviate from the manual calculation exactly by the factor of the material partial safety factor. Why?
- How can I run the RX‑TIMBER Frame plugin? I did not find it in the Add-on Modules menu nor in Project Navigator - Data.
- I have a question about the results of the serviceability limit state design: How is the increment of the dead load by the factor 1.8 and the imposed load by 1.48 explained in the result combinations for the SLS design?
