Interesting customer projects realized with Dlubal structural analysis software.
RF-/TIMBER Pro Add-on Module for RFEM/RSTAB
Design of Timber Members and Sets of Members
RF-/TIMBER Pro designs timber members and sets of members on the basis of the design procedures according to:
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EN 1995‑1‑1 (including National Annexes; see below) -
SIA 265:2012 + SIA 265‑C1:2012 -
DIN 1052:2008‑12
In addition to stress designs, RF‑/TIMBER Pro performs the stability analysis of members according to the equivalent member method or second‑order analysis as well as designs of the serviceability limit state and fire resistance. Furthermore, the module provides the option of automatic cross‑section optimization.
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Features
- Full integration in RFEM/RSTAB with import of all relevant information and internal forces
- For design according to EN 1995-1-1, the following National Annexes are available:
DIN EN 1995-1-1/NA:2013-08 (Germany)
ÖNORM B 1995-1-1:2015-06 (Austria)
NBN EN 1995-1-1/ANB:2012-07 (Belgium)
BDS EN 1995-1-1/NA:2012-02 (Bulgaria)
DK EN 1995-1-1/NA:2011-12 (Denmark)
SFS EN 1995-1-1/NA:2007-11 (Finland)
NF EN 1995-1-1/NA:2010-05 (France)
I.S. EN 1995-1-1/NA:2010-03 (Ireland)
UNI EN 1995-1-1/NA:2010-09 (Italy)
LVS EN 1995-1-1/NA:2012-05 (Latvia)
LST EN 1995-1-1/NA:2011-10 (Lithuania)
LU EN 1995-1-1/NA:2011-09 (Luxembourg)
NEN EN 1995-1-1/NB:2007-11 (Netherlands)
NS EN 1995-1-1/NA:2010-05 (Norway)
PN EN 1995-1-1/NA:2010-09 (Poland)
NP EN 1995-1-1 (Portugal)
SR EN 1995-1-1/NB:2008-03 (Romania)
SS EN 1995-1-1 (Sweden)
STN EN 1995-1-1/NA:2008-12 (Slovakia)
SIST EN 1995-1-1/A101:2006-3 (Slovenia)
UNE EN 1995-1-1/AN:2016-04 (Spain)
CSN EN 1995-1-1/NA:2007-09 (Czech Republic)
BS EN 1995-1-1/NA:2009-10 (United Kingdom)
CYS EN 1995-1-1/NA:2011-02 (Cyprus)
- Extensive material library in compliance with the EN, SIA, and DIN standards
- Design of circular, rectangular, and user-defined composite cross-sections (also hybrids)
- Specific classification of a structure in service classes (SECL) and actions in load duration classes (LDC)
- Design of members and sets of members
- Stability analysis according to the Equivalent Member Method or the second-order analysis
- Determination of governing internal forces
- Icon informing about successful or failed design
- Visualization of the design criterion on RFEM/RSTAB model
- Automatic cross-section optimization
- Parts lists and quantity surveying
- Data export to MS Excel
- Free setting of fire resistance classes and charring rates as well as free selection of charring sides
- Fire resistance designs in the selected standard according to:
- EN 1995-1-2
- SIA 265:2012 + SIA 265-C1:2012
- DIN 4102-22:2004
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- Import of buckling lengths from the RF-STABILITY/RSBUCK add-on module
- Design of tapered members according to the previously defined cut-to-grain angle
- Ridge design and analysis of transversal tension stresses for defined ridges
- Design of curved members and sets of members
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Input
After opening the module, it is necessary to select members or sets of members, load cases, load or result combinations for the ultimate and serviceability limit state designs and for fire resistance design. The materials from RFEM/RSTAB are preset and can be adjusted in RF-/TIMBER Pro. Material properties listed in the respective standard are included in the material library.
After the cross-section check, the module determines the load duration classes (LDC) and the service classes (SECL). It is possible to assign them to the selected load cases and members.
Combined cross-sections may consist of various materials. The RF-/TIMBER Pro add-on module performs designs considering the shifted neutral axis (in the case of semi-rigid cross-sections). 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 beam type.
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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 with and without torsion. Designs proceed at the level of design stress values.
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 compressive force as well as bending and tension. Deflection of inner spans and cantilevers is determined in characteristic and quasi-permanent design situations.
Separate design cases allow for a flexible and stability analysis of members, sets of members, and loads. In the case of tapered members, the cut-to-grain angle is considered in the bending tension and bending compression area. If there is a ridge defined, the module performs the ridge design additionally.
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Results
After the calculation, the module displays results in clearly arranged result tables. Each intermediate value is listed, making the designs transparent. 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 to perform 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. Result diagrams of members and sets of members enable targeted evaluation.
In addition to input and result data including design details shown in tables, you can add any graphic into the printout report. In this way, a comprehensible and clearly arranged documentation is guaranteed.
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Customer Projects
Book About FEA and RFEM
In this book for engineers and students, you will learn the basics of the finite element method in a practical way by means of manageable examples that have been calculated with RFEM.
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New
Simplified vibration analysis for EC 5
With the RF-/TIMBER Pro add-on module, you can perform the vibration analysis known from DIN 1052 for the design according to EN 1995-1-1. In this analysis, the deflection under permanent and quasi-permanent action at the ideal one‑span beam may not exceed the limit value (6 mm, according to DIN 1052). If you consider the relationship between natural frequency and deflection for a hinged single-span beam loaded with a constant distributed load, the 6 mm result in a minimum natural frequency of about 7.2 Hz.
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 compressive force as well as bending and tension. Deflection of inner spans and cantilevers is compared to the maximal 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.
- Can I use RFEM to calculate a log house three-dimensionally?
- Can I design laminated veneer lumber with RFEM/RSTAB?
- I would like to carry out the flexural buckling design for timber components with imperfections and internal forces according to the second-order analysis. Is it sufficient to activate this in Details of the RF‑/TIMBER Pro add-on module or is it necessary to make additional settings?
- When performing the fire resistance design with TIMBER Pro, I get Error 10001. How can I fix the error?
- I have selected all members available for design in RF‑/TIMBER Pro. Why are the tapered members not designed?
- Can I consider a reduction of the stiffness according to the German regulation NCI NA.5.9 in TIMBER Pro?
- After the design with RF‑/TIMBER Pro, I optimized a cross-section. Why is the utilization of the optimized cross-section exceeded now?
- Where can I adjust the effective length lef according to Table 6.1 of Eurocode 5 in the TIMBER Pro add-on module?
- How can I perform a stability analysis for a tapered member?
- I have defined a notch on a support. Why is it not taken into account for the reduction factor kv?
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