The following programs and add-ons are particularly suitable for structural timber projects.
Main Program
To model your structure and determine the internal forces, you need one of the main programs. Depending on the application area, RSTAB 9 or RFEM 6 can be used.
- RSTAB: Analysis of planar or spatial frame & truss structures
- RFEM: Finite element analysis of plate, wall, shell, and member structures
If your model has surface components, such as plates and walls, in addition to membe elements, you need RFEM. Unique to this program, the options are available to analyze laminated or cross-laminated timber elements, as well as curved objects.
Timber Design Add-on
With the [[#/en-US/products/rfem-fea-software/add-ons-for-rfem-6/design/timber-design/timber-design-strength-and-stability Timber Design add-on, you can you design the timber components of the model. The standard-specific designs cover both members (bending beams, columns) and surfaces (plates, walls). For columns, the stability analysis is performed according to the equivalent member method or the second-order analysis.
The designs in the ultimate limit state and the serviceability limit state as well as in the fire resistance are possible according to the following standards:
- EN 1995 – including National Annexes
- SIA 265
- NTC
- NDS
- CSA O86
- GB 50005
- AS 1720
In the fire resistance design, the cross-section's charring is taken into account for both the stiffness and the design.
Multilayer Surfaces Add-On
For RFEM, the Multilayer Surfaces add-on is available, which analyze laminate and sandwich structures with user-defined layer structures. This allows you to design cross-laminated timber plates, for example.
If certain layers have nonlinear material behavior, you can assign the appropriate properties to them. Furthermore, you can also analyze curved surfaces using this add-on.
Additional Add-ons
For special requirements of a timber structure, there are other add-ons and add-on programs that support you in solving the task.
If you need to perform seismic or vibration analysis, the dynamic analysis add-ons provide you with powerful tools for your structural analysis and design. The Modal Analysis add-on enables the calculation of natural frequencies, and in combination with the Response Spectrum Analysis add-on, you can also perform seismic analysis according to numerous standards.
If you are designing a building with a complicated shape, so that the determination of wind loads according to the relevant standards reaches its limits, the RWIND RWIND program will help you: Using a CFD analysis, you can determine the wind loads even for highly complex building shapes.
If the construction stages affect the final internal forces in a structure, or if the governing internal forces for the structural design result from certain construction stages, you should consider the modeling using the Construction Stages Analysis add-on. The Building Model add-on facilitates you the input of large multi-story timber structures.
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