Compared to the RF‑/DYNAM Pro - Natural Vibrations add-on module (RFEM 5 / RSTAB 8), the following new features have been added to the Modal Analysis add-on for RFEM 6 / RSTAB 9:
- Preset combination coefficients for various standards (EC 8, ASCE, and so on)
- Optional neglect of masses (for example, mass of foundations)
- Methods for determining the number of mode shapes (user-defined, automatic - to reach effective modal mass factors, automatic - to reach the maximum natural frequency)
- Output of modal masses, effective modal masses, modal mass factors, and participation factors
- Masses in mesh points displayed in tables and graphics
- Various scaling options for mode shapes in the Result navigator
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- General
- Optimization & Cost / CO2 Emission Estimation for RFEM 6
- Optimization & Cost / CO2 Emission Estimation for RSTAB 9
- Artificial intelligence technology (AI): Particle swarm optimization (PSO)
- Structure optimization according to the minimum weight or deformation
- Use of any number of optimization parameters
- Specification of variable ranges
- Optimization of cross-sections and materials
- Parameter definition types
- Optimization | Ascending or Optimization | Descending
- Application of parametric models and blocks
- Code-based JavaScript parametrization of blocks
- Optimization taking into account the design results
- Tabular display of the best model mutations
- Real-time display of the model mutations in the optimization process
- Model cost estimation by specifying unit prices
- Determination of the global warming potential GWP when realizing the model by estimating the CO2 equivalent
- Specification of weight-, volume-, and area-based units (price and CO2e)
- Automatic consideration of masses from self-weight
- Direct import of masses from load cases or load combinations
- Optional definition of additional masses (nodal, linear, or surface masses, as well as inertia masses) directly in the load cases
- Optional neglect of masses (for example, mass of foundations)
- Combination of masses in different load cases and load combinations
- Preset combination coefficients for various standards (EC 8, SIA 261, ASCE 7,...)
- Optional import of initial states (for example, to consider prestress and imperfection)
- Structure Modification
- Consideration of failed supports or members/surfaces/solids
- Definition of several modal analyses (for example, to analyze different masses or stiffness modifications)
- Selection of mass matrix type (diagonal matrix, consistent matrix, unit matrix), including user-defined specification of translational and rotational degrees of freedom
- Methods for determining the number of mode shapes (user-defined, automatic - to reach effective modal mass factors, automatic - to reach the maximum natural frequency - only available in RSTAB)
- Determination of mode shapes and masses in nodes or FE mesh points
- Results of eigenvalue, angular frequency, natural frequency, and period
- Output of modal masses, effective modal masses, modal mass factors, and participation factors
- Masses in mesh points displayed in tables and graphics
- Visualization and animation of mode shapes
- Various scaling options for mode shapes
- Documentation of numerical and graphical results in printout report
Wind loads are also not a problem in your design. You can automatically generate wind loads as member loads or area loads (RFEM) on the following structural components:
- Vertical walls
- Flat roofs
- Monopitch roofs
- Duopitch/troughed roofs
- Vertical walls with duopitch roof
- Vertical walls with flat/monopitch roof
The following standards are available to you:
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EN 1991-1-4 (including National Annexes)
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ASCE 7
-
CTE DB-SE-AE
-
GB 50009
With Dlubal, you can safely and easily design structures all over the world. Select from a large number of standards in the Base Data. You can also decide whether to create the combinations automatically.
The following standards are available:
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EN 1990
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EN 1990 | Timber
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EN 1990 | Road Bridges
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EN 1990 | Cranes
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EN 1990 | Geotechnical Engineering
-
EN 1990 | Base + Timber
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EN 15512
-
ASCE 7
-
ASCE 7 | Timber
-
ACI 318
-
IBC
-
CAN/CSA
-
NBC
-
NBC | Timber
-
NBR 8681
-
IS 800
-
SIA 260
-
SIA 260 | Timber
-
BS 5950
-
GB 50009
-
GB 50068
-
GB 50011
-
CTE DB-SE
-
SANS 10160-1
-
NTC
-
NTC | Timber
-
AS/NZS 1170.0
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SP 20.13330:2016
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TSC | Steel
For the European standards (EC), the following National Annexes are available:
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DIN | 2012-08 (Germany)
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CEN | 2010-04 (European Union)
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BDS | 2013-03 (Bulgaria)
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BS | 2009-06 (United Kingdom)
-
CSN | 2015-05 (Czech Republic)
-
CYS | 2010-06 (Cyprus)
-
DK | 2013-09 (Denmark)
-
ELOT | 2009-01 (Greece)
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EVS-EN 1990:2002+NA:2002 (Estonia)
-
IS | 2010-04 (Ireland)
-
LST | 2012-01 (Lithuania)
-
LU | 2020-03 (Luxembourg)
-
LVS | 2015-01 (Latvia)
-
MS | 2010-02 (Malaysia)
-
NBN | 2015-05 (Belgium)
-
NEN | 2011-12 (Netherlands)
-
NF | 2011-12 (France)
-
NP | 2009-12 (Portugal)
-
NS | 2016-05 (Norway)
-
ÖNORM | 2013-03 (Austria)
-
PN | 2010-09 (Poland)
-
SFS | 2010-09 (Finland)
-
SIST | 2010-08 (Slovenia)
-
SR | 2006-10 (Romania)
-
SS | 2008-06 (Singapore)
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SS | 2019-01 (Sweden)
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STN | 2010-01 (Slovakia)
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TKP | 2011-11 (Belarus)
-
UNE | 2010-07 (Spain)
-
UNI | 2010-10 (Italy)
Do your structures also have to withstand snowfall? Use the Snow Load Wizard to generate snow loads as member loads or surface loads.
The following standards are available:
-
EN 1991-1-3 (incl. National Annexes)
-
ASCE 7
-
NBC
-
SIA 261
-
CTE DB-SE-AE
-
GB 50009
-
IS 875
The Base Data dialog box includes a wide range of standards and the option to create combinations automatically. The following standards are available:
-
EN 1990:2002
-
EN 1990 + EN 1995:2004 (Timber)
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EN 1990 + EN 1991-2; Road bridges
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EN 1990 + EN 1991-3; Cranes
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EN 1990 + EN 1997
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to DIN 1055-100:2001-03
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DIN 1055-100 + DIN 1052:2004-08 (timber)
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DIN 1055-100 + DIN 18008 (Glass)
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DIN 1052 (simplified) (timber)
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DIN 18800:1990
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ASCE 7‑10
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ASCE 7-10 NDS (Wood)
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ACI 318-14
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IBC 2015
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CAN/CSA S 16.1-94:1994
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NBCC: 2005
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NBR 8681
-
IS 800:2007
-
SIA 260:2003
-
SIA 260 + SIA 265:2003 (timber)
-
BS 5950-1:2000
-
GB 50009-2012
-
CTE DB-SE
For the European standards (EC), the following National Annexes are available:
-
DIN EN 1990/NA:2009-05 (Germany)
-
NBN EN 1990 - ANB: 2005 (Belgium)
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BDS EN 1990:2003/NA:2008 (Bulgaria)
-
DK EN 1990/NA:2007-07 (Denmark)
-
SFS EN 1990/NA:2005 (Finland)
-
NF EN 1990/NA:2005/12 (France)
-
ELOT EN 1990:2009 (Greece)
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UNI EN 1990/NA:2007-07 (Italy)
-
IS EN 1990:2002 + NA:2010 (Ireland)
-
LVS EN 1990:2003/NA:2010 (Latvia)
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LST EN 1990/NA:2010-11 (Lithuania)
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LU EN 1990/NA:2011-09 (Luxembourg)
-
MS EN 1990:2010 (Malaysia)
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NEN EN 1990/NA:2006 (Netherlands)
- NS EN 1990/NA:2008 (Norway)
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ÖNORM EN 1990:2007-02 (Austria)
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NP EN 1990:2009 (Portugal)
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PN EN 1990/NA:2004 (Poland)
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SR EN 1990/NA:2006-10 (Romania)
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SIST EN 1990: 2004/A1:2005 (Slovenia)
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SS EN 1990:2008 (Singapore)
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SS EN 1990/BFS 2010:28 (Sweden)
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STN EN 1990/NA:2009-08 (Slovakia)
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UNE EN 1990 2003 (Spain)
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CSN EN 1990/NA:2004-03 (Czech Republic)
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BS EN 1990/NA:2004-12 (the United Kingdom)
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TKP EN 1990/NA:2011 (Belarus)
-
CYS EN 1990:2002 (Cyprus)
- Response spectra in accordance with different standards
- The following standards are implemented:
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EN 1998-1:2010 + A1:2013 (European Union)
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DIN 4149:1981-04 (Germany)
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DIN 4149:2005-04 (Germany)
-
IBC 2000 (USA)
-
IBC 2009-ASCE/SEI 7-05 (USA)
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IBC 2012/15 - ASCE/SEI 7-10 (USA)
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IBC 2018 - ASCE/SEI 7-16 (USA)
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ÖNORM B 4015:2007-02 (Austria)
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NTC 2018 (Italy)
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NCSE-02 (Spain)
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SIA 261/1:2003 (Switzerland)
-
SIA 261/1:2014 (Switzerland)
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SIA 261/1: 2020 (Switzerland)
-
O.G. 23089 + OG 23390 (Turkey)
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SANS 10160-4 2010 (South Africa)
-
SBC 301:2007 (Saudi Arabia)
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GB 50011 - 2001 (China)
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GB 50011 - 2010 (China)
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NBC 2015 (Canada)
-
DTR BC 2-48 (Algeria)
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DTR RPA99 (Algeria)
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CFE Sismo 08 (Mexico)
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CIRSOC 103 (Argentina)
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NSR - 10 (Colombia)
-
IS 1893:2002 (India)
-
AS1170.4 (Australia)
-
NCh 433 1996 (Chile)
-
- The following National Annexes according to EN 1998‑1 are available:
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DIN EN 1998-1/NA:2011-01 (Germany)
-
ÖNORM EN 1991-1-1:2011-09 (Austria)
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NBN - ENV 1998-1-1: 2002 NAD-E/N/F (Belgium)
-
ČSN EN 1998-1/NA:2007 (Czech Republic)
-
NF EN 1998-1-1/NA:2014-09 (France)
-
UNI-EN 1991-1-1/NA:2007 (Italy)
-
NP EN 1998-1/NA:2009 (Portugal)
-
SR EN 1998-1/NA:2004 (Romania)
-
STN EN 1998-1/NA:2008 (Slovakia)
-
SIST EN 1998-1:2005/A101:2006 (Slovenia)
-
CYS EN 1998-1/NA:2004 (Cyprus)
-
NA to BS EN 1998-1:2004:2008 (United Kingdom)
- NS-EN 1998-1:2004 + A1:2013/NA:2014 (Norway)
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- User-defined response spectra
- Direction-relative response spectrum approach
- Relevant mode shapes for the response spectrum can be selected manually or automatically (5% rule from EC 8 can be applied)
- Generated equivalent static loads are exported to load cases, separately for each modal contribution and separately for each direction
- Result combinations by modal superposition (SRSS and CQC rule) and direction superposition (SRSS or 100% / 30% rule)
- Signed results based on the dominant eigenmode can be displayed
First, it is necessary to decide whether to perform design according to ASD or LRFD. Then, you can enter the load cases, load combinations, and result combinations to be designed. Load combinations according to ASCE 7 can be generated either manually or automatically in RFEM/RSTAB.
In the next steps, you can adjust presettings of lateral intermediate supports, effective lengths, and other standard-specific design parameters, such as the modification factor Cb for lateral-torsional buckling or the shear lag factor. In the case of continuous members, it is possible to define individual support conditions and eccentricities of each intermediate node of single members. A special FEA tool determines critical loads and moments required for the stability analysis.
In connection with RFEM/RSTAB, it is possible to apply the Direct Analysis Method taking into account the influence of the general calculation according to the second-order analysis. In this way, you avoid using special enlargement factors.
First, it is necessary to decide whether to perform design according to ASD or LRFD. Then, you can enter the load cases, load combinations, and result combinations to be designed. Load combinations according to ASCE 7 can be generated either manually or automatically in RFEM/RSTAB.
Further specifications include presetting of lateral intermediate supports, effective lengths, and other standard-specific design parameters. When using continuous members, it is possible to define individual support conditions and eccentricities at each intermediate node of the single members. A special FEA tool then internally determines the effective radii of gyration required for the stability analysis for these situations.
There are load generators available for beam structures, creating snow loads according to ASCE/SEI 7-10. The load cases are generated depending on the roof shape. Another generator creates coating loads (ice). You can save recurring load combinations as templates.
- Response spectra of numerous standards (ASCE 7-16, NBC 2015, etc.)
- User-defined response spectra or those generated from accelerograms
- Direction-relative response spectrum approach
- Manual or automatic selection of the relevant mode shapes of response spectra (5% rule of EC 8 applicable)
- Result combinations by modal superimposition (SRSS or CQC rule) and by direction superimposition (SRSS or 100% / 30% rule)
Snow loads can be generated as member loads on flat/monopitch roofs and duopitch roofs.
Additional snow loads such as drifted snow loads, snow overhangs, and snow guards can be taken into account as well.
The following standards are available:
-
EN 1991-1-3 (incl. National Annexes)
-
DIN 1055-5
-
CTE DB-SE-AE
-
ASCE/SEI 7-16
Wind loads can be automatically generated as member loads on the following structural components (optional with internal pressure for open buildings):
- Vertical walls
- Flat roofs
- Monopitch roofs
- Duopitch/troughed roofs
- Vertical walls with roof
The following standards are available:
-
EN 1991-1-3 (incl. National Annexes)
-
DIN 1055-4
-
CTE DB-SE-AE
-
ASCE/SEI 7-16
The snow load generator can generate snow loads as member loads or surface loads.
Additional snow loads such as drifted snow loads, snow overhangs, and snow guards can be taken into account as well.
The following standards are available:
-
EN 1991-1-3 (incl. National Annexes)
-
DIN 1055-5
-
CTE DB-SE-AE
-
ASCE/SEI 7-16
Wind loads can be automatically generated as member loads or area loads on the following structural components (optional with internal pressure for open buildings):
- Vertical walls
- Flat roofs
- Monopitch roofs
- Duopitch/troughed roofs
- Vertical walls with roof
The following standards are available:
-
EN 1991-1-3 (incl. National Annexes)
-
DIN 1055-4
-
CTE DB-SE-AE
-
ASCE/SEI 7-16