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RF-/TIMBER NBR Add-on Module for RFEM/RSTAB
Design of Timber Members and Sets of Members According to Brazilian Standard NBR 7190:1997
The RF‑/TIMBER NBR add‑on module performs the ultimate and serviceability limit state design according to the Brazilian timber construction standard NBR 7190:1997.
RF‑/TIMBER NBR includes a large cross-section library as well as an extensive material library with standard‑specific strength values. In addition to stress analysis, it is also possible to perform stability analysis for members in RF‑/TIMBER NBR according to the equivalent member method or the second order analysis. Furthermore, it is possible to perform serviceability limit state design.
- Full integration in RFEM/RSTAB including import of all relevant information and internal forces
- 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
- Brazilian material library and cross-section library
- User-defined entry of rectangular and circular cross-sections
- Cross-section optimization with optional transfer to RFEM/RSTAB
- Optional import of effective lengths from the RSBUCK or RF‑STABILITY add‑on module
- Detailed result documentation including references to design equations of the used standard
- Various filter and sorting options of results including result lists by member, cross-sections, x-location, or by load case, load and result combination
- Consideration of moisture service conditions
- Visualization of the design criterion on the RFEM/RSTAB model
- Data export to MS Excel
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 and serviceability limit state design. The materials from RFEM/RSTAB are preset and can be adjusted in RF‑/TIMBER NBR. Material properties listed in the respective standard are included in the material library.
When checking the cross-sections, you can specify whether to consider a cross-section selected in RFEM/RSTAB, or a modified cross-section. Then, you can define the load duration classes, the moisture service conditions, and timber treatment.
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.
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-torsional 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. 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 the stability analysis type, member slendernesses, and limit deflections can be freely adjusted.
After the calculation, the module displays results in clearly arranged result tables. All intermediate values (such as governing internal forces, modification factors, and others) are included, providing a transparent design. The results are listed by load case, cross-section, member, and set of members.
If the analysis fails, the relevant cross-sections can be modified in an optimization process. It is also possible to transfer the optimized cross-sections to RFEM/RSTAB for a new calculation.
Design ratio is represented with different colors in the RFEM/RSTAB model. In 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. In this way, a comprehensible and clearly arranged documentation is guaranteed. You can select the report contents and the extent of the results specifically for the individual designs.
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