Design of Timber Members and Sets of Members According to ANSI/AWC NDS
RF-/TIMBER AWC | Features
- Design of members and continuous members for tension, compression, bending, shear, and combined internal forces
- Stability analysis for lateral-torsional buckling and buckling according to the equivalent member method or the second order analysis
- Serviceability limit state design by limitation of deflections
- Design of tapered and curved beams consisting of glulam timber
- Free configuration of charring time and charring rates, as well as free choice of charring sides for fire design
- Material and cross-section library based on the supplement to the standards ANSI/AWC NDS‑2018 and ANSI/AWC NDS-2015, including adjustment factors
- User-defined entry of rectangular and circular cross-sections
- Automatic cross-section optimization
- Optional import of buckling lengths from the RF-STABILITY/RSBUCK module
- Detailed result documentation including references to design equations of the used standard
- Various filtering and sorting options of results
- Consideration of temperature effects and moisture service conditions
- Visualization of design criterion on RFEM/RSTAB model
- Data export to MS Excel
- Metric and imperial units
RF-/TIMBER AWC | Input
After opening the add‑on module, it is necessary to select the members/sets of members, load cases, load or result combinations for the ultimate limit state, serviceability limit state, and fire resistance design (only ASD). Also, you can select the design method (ASD or LRFD). The materials from RFEM/RSTAB are preset and can be adjusted in RF-/TIMBER AWC. Material properties listed in the respective standard are included in the material library.
When checking the cross-sections, you can specify whether to apply the design values of the relevant standard, or user-defined values. Then, you can consider the load duration classes (LDC), temperature effects, and moisture service conditions.
The deformation analysis requires the reference lengths of the relevant members and sets of members. Furthermore, you can define a specific direction of deflection, precamber and the beam type.
For fire resistance design, you can define the charring sides of a member or set of members.
RF-/TIMBER AWC | Design
The cross-section resistance design analyzes tension and compression along the grain, bending, bending and tension/compression as well as the strength in shear due to shear force.
The design of structural components at risk of buckling or lateral buckling is performed according to the Equivalent Member Method and considers the systematic axial compression, bending with and without compression force as well as bending and tension. The deflection of inner spans and cantilevers is compared to the maximum allowable deflection.
Separate design cases allow for a flexible and stability analysis of members, sets of members, and loads.
Design-relevant parameters such as load duration in case of fire, member slendernesses, limit deflection can be adjusted as desired.
RF-/TIMBER AWC | Results
After the calculation, the module displays results in clearly arranged result tables. All intermediate values (for example, governing internal forces, adjustment factors, and so on) can be included in order to make the design more transparent. The results are sorted by load case, cross-section, set of members, and members. If the analysis fails, the affected cross-sections can be modified in an optimization process.
The design ratio is represented with different colors in the RFEM/RSTAB model. This way, you can quickly recognize critical or oversized areas of the cross-section. Furthermore, result diagrams displayed on the member or set of members ensure targeted evaluation.
In addition to the input and result data, including design details displayed in tables, you can add all graphics into the printout report. This way, comprehensible and clearly arranged documentation is guaranteed. You can select the report contents and extent specifically for the individual designs.
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