Definition of Multilayer Surfaces, such as Laminate Surfaces or Cross-Laminated Timber (CLT)
Multilayer Surfaces | Features
- Flexible definition of different layer compositions
- High efficiency due to the minimum amount of input data
- Flexibility due to detailed setting options for basis and extent of calculations
- Generation of a local overall stiffness matrix of the surface in RFEM, based on the selected material model and the layers contained
- Graphical display of the orientation of individual layers
Multilayer Surfaces | Procedure
Please note that all data specified in the Multilayer Surfaces add-on regarding materials, load combinations, and result combinations must comply with the design concept of the standard. The material library already contains the relevant materials. RFEM allows you to automatically generate the load and result combinations in accordance with the standard. If you want, you can also create these combinations manually.
You can vary the structure of layers forming the basis for the stiffness calculation. Furthermore, you can adjust the parameters defined by the selected material model according to your individual needs. This way, completely free selection is provided to you when generating the stiffnesses.
The selected material also determines the limit stresses of each layer. You can also adjust these values according to your needs. In this case, the composition of layers is assigned to any surface as a thickness type.
Multilayer Surfaces | Results
The stiffnesses contain all design check formulas, including standard references, so you can precisely follow the design checks.
In this case, all input and result data are part of the RFEM printout report. You can select the report contents and extent specifically for the individual design checks. In the end, you have thus exactly what you wanted.
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Among others, the following cross-laminated timber manufacturers are available in the layer structure library:
- Binderholz (USA)
- KLH (USA, CAN)
- Kalesnikoff (USA, CAN)
- Nordic Structures (USA, CAN)
- Mercer Mass Timber
- SmartLam
- Sterling Structural
- Superstructures listed in Lignatec Edition 32 "Cross-Laminated Timber of Swiss Production"
By importing a structure from the layer structure library, all relevant parameters are adopted automatically. The library is continually updated.
A library for cross-laminated timber panels is implemented in RFEM, from which you can import the manufacturer's layer structures (for example, Binderholz, KLH, Piveteaubois, Södra, Züblin Timber, Schilliger, Stora Enso). In addition to the layer thicknesses and materials, there is also the information about stiffness reductions and the narrow side bonding.
Go to Explanatory VideoThe stress and strain results by surface can be output in the surface result table according to the thickness layer.