Structural FEA Software RFEM 5 | Automatic Generation of Combinations

Structural Analysis & Engineering Software

The FEA program RFEM allows for quick and easy modeling, structural and dynamic analysis, as well as design of models with member, plate, wall, folded plate, shell, and solid elements.

Thanks to the modular software concept, you can enhance the basic program RFEM with the corresponding modules and thus use it in a wide variety of areas.

Automatic Generation of Load Combinations

In RFEM, you can automatically create load and result combinations according to Eurocode and other international standards in compliance with the corresponding combination expressions. In a clearly arranged window, it is possible to copy, add, or renumber load cases, for example. Furthermore, you can manage the load cases and combinations in Tables 2.1 – 2.6.

1

Standards

The General Data dialog box includes a wide range of standards and the option to create combinations automatically.  The following standards are available:

  • European Union EN 1990: 2002
  • European Union EN 1990 + EN 1995: 2004 (timber)
  • European Union EN 1990 + EN 1991-2; Road bridges
  • European Union EN 1990 + EN 1991-3; Cranes
  • European Union EN 1990 + EN 1997
  • Germany DIN 1055-100: 2001-03
  • Germany DIN 1055-100 + DIN 1052: 2004-08 (timber)
  • Germany DIN 1055-100 + DIN 18008 (glass)
  • Germany DIN 1052 (simplified) (timber)
  • Germany DIN 18800: 1990
  • United States of America ASCE 7-10
  • United States of America ASCE 7-10 NDS (timber)
  • United States of America ACI 318-14
  • United States of America IBC 2015
  • Canada CAN/CSA S 16.1-94: 1994
  • Canada NBCC: 2005
  •  NBR 8681
  • India IS 800: 2007
  • Switzerland SIA 260: 2003
  • Switzerland SIA 260 + SIA 265: 2003 (timber)
  •  BS 5950-1: 2000
  • China GB 50009-2012
  •  CTE DB-SE

For the European standards (EC), the following National Annexes are available:

  • Deutschland DIN EN 1990/NA: 2009-05 (Germany)
  •  NBN EN 1990 - ANB: 2005 (Belgium)
  • Bulgaria 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)
  • Griechenland ELOT EN 1990: 2009 (Greece)
  •  UNI EN 1990/NA: 2007-07 (Italy)
  • Ireland IS EN 1990: 2002 + NA: 2010 (Ireland)
  •  LVS EN 1990: 2003/NA: 2010 (Latvia)
  • Lithuania LST EN 1990/NA: 2010-11 (Lithuania)
  •  LU EN 1990/NA: 2011-09 (Luxembourg)
  •  MS EN 1990: 2010 (Malaysia)
  •  NEN EN 1990/NA: 2006 (Netherlands)
  • Norway NS EN 1990/NA: 2008 (Norway)
  •  ÖNORM EN 1990: 2007-02 (Austria)
  •  NP EN 1990: 2009 (Portugal)
  •  PN EN 1990/NA: 2004 (Poland)
  • Romania SR EN 1990/NA: 2006-10 (Romania)
  •  SIST EN 1990: 2004/A1: 2005 (Slovenia)
  •  SS EN 1990: 2008 (Singapore)
  •  SS EN 1990/FSO 2010: 28 (Sweden)
  •  STN EN 1990/NA: 2009-08 (Slovakia)
  •  UNE EN 1990 2003 (Spain)
  •  CSN EN 1990/NA: 2004-03 (Czech Republic)
  •  BS EN 1990/NA: 2004-12 (United Kingdom)
  • Weißrussland CPM EN 1990/NA: 2011 (Belarus)
  • Cyprus CYS EN 1990: 2002 (Cyprus)
2

Load Cases / Action Types

In the "Edit Load Cases and Combinations" dialog box, you can create and edit load cases as well as generate action, load, and result combinations. It is possible to assign various action types to the individual load cases in accordance with the selected standard. If several loads have been assigned to one action type, they can act simultaneously or alternatively (for example, wind from the left or right).

3

Combination Expressions

For the combination of actions in the ultimate and the serviceability limit state, you can select various design situations according to the standard (for example, ULS (STR/GEO) - permanent/transient, SLS - quasi-permanent, and others). Furthermore, there is the option to integrate imperfections in the combination and to determine load cases that should not be combined with other load cases (for example, construction load for roof not combined with snow load).

4

Accidental Design Situation

The "Accidental" design situation automatically considers accidental actions such as earthquake, explosion loads, collisions, and others. When using German standards, you can select the "Accidental - Snow" design situation to consider the North German Plain automatically as well.

5

Reduction of Automatically Generated Combinations

There are three options to reduce the number of combinations. The first two procedures are only available for the generation of load combinations, not for result combinations.

The first option allows for automatic analysis of all load case results (internal forces, deformations, and so on) of selected elements. Then, the program will generate only those combinations that include the load cases producing a maximum or minimum. In addition, you can define a maximum number of relevant load cases, or neglect load cases with a very small contribution to the maximum and minimum values.

The second option allows for automatic evaluation of generated temporary or user-defined result combinations. Then, only the governing load combinations are created.

The third option to reduce the number of generated combinations is to classify only selected actions as leading actions.

6

Action Combinations

The actions are automatically superimposed in accordance with combination expressions and then displayed as "action combinations". It is possible to define which action combinations will eventually be used for the generation of load or result combinations. Based on the created action combinations, you can estimate how the combination expressions affect the number of combinations.

7

Load Combinations

The load cases included in load combinations are added together and then calculated in consideration of the corresponding factors (partial safety and combination factors, coefficients regarding consequence classes, and others). The load combinations can be created automatically in compliance with the combination expressions of the standard. It is possible to perform the calculation according to the linear static analysis, second-order analysis, or large deformation analysis, as well as for postcritical failure. Optionally, you can define whether the internal forces are relative to a deformed or non-deformed structure.

8

Result Combinations

The load cases included in result combinations are calculated first. Then, the results are superimposed by taking into account the corresponding factors. In the result combinations, you can superimpose the results of load cases and load combinations as well as other result combinations. Internal forces are added together by default. However, there is the option of a square addition, which is relevant for dynamic analysis.

9

Modifying Stiffness / Considering Initial Deformations

In the individual load cases or combinations, there is the option to modify the stiffnesses of materials; cross-sections; nodal, line and surface supports; and member and line hinges for all or selected members. Furthermore, it is possible to consider initial deformations from other load cases or load combinations.

Event Invitation

International Mass Timber Conference

Conference 03/27/2023 - 03/29/2023

Online Training | English

Eurocode 5 | Timber Structures According to DIN EN 1995-1-1

Online Training 09/23/2021 8:30 AM - 12:30 PM CEST

Online Training | English

Eurocode 3 | Steel Structures According to DIN EN 1993-1-1

Online Training 08/25/2021 8:30 AM - 12:30 PM CEST

Online Training | English

RFEM for Students | USA

Online Training 08/11/2021 1:00 PM - 4:00 PM EDT

Online Training | English

RFEM | Structural Dynamics and Seismic Design According to EC 8

Online Training 08/11/2021 8:30 AM - 12:30 PM CEST

Online Training | English

Eurocode 2 | Concrete structures according to DIN EN 1992-1-1

Online Training 07/29/2021 8:30 AM - 12:30 PM CEST

Online Training | English

RFEM | Basics

Online Training 07/13/2021 9:00 AM - 1:00 PM CEST

Online Training | English

RFEM | Basics | USA

Online Training 06/17/2021 9:00 AM - 1:00 PM EDT

Online Training | English

RFEM for Students | Part 3

Online Training 06/15/2021 2:00 PM - 4:30 PM CEST

Glass Design with Dlubal Software

Glass Design with Dlubal Software

Webinar 06/08/2021 2:00 PM - 2:45 PM CEST

Online Training | English

RFEM | Structural dynamics and seismic design according to EC 8

Online Training 06/02/2021 8:30 AM - 12:30 PM CEST

Online Training | English

Eurocode 5 | Timber structures according to DIN EN 1995-1-1

Online Training 05/20/2021 8:30 AM - 12:30 PM CEST

Online Training | English

RFEM for Students | Part 2

Online Training 05/17/2021 2:00 PM - 4:30 PM CEST

Blast Time History Analysis in RFEM

Blast Time History Analysis in RFEM

Webinar 05/13/2021 2:00 PM - 3:00 PM EDT

Online Training | English

Eurocode 2 | Concrete structures according to DIN EN 1992-1-1

Online Training 05/12/2021 8:30 AM - 12:30 PM CEST

Timber Structures | Part 2: Design

Timber Beam and Surface Structures | Part 2: Design

Webinar 05/11/2021 2:00 PM - 3:00 PM CEST

Online Training | English

Eurocode 3 | Steel structures according to DIN EN 1993-1-1

Online Training 05/06/2021 8:30 AM - 12:30 PM CEST

Online Training | English

RFEM | Basics

Online Training 04/23/2021 8:30 AM - 12:30 PM CEST

Online Training | English

RFEM for Students | USA

Online Training 04/21/2021 1:00 PM - 4:00 PM EDT

RFEM 5
RF-STEEL EC3

Add-on Module

Design of steel members according to Eurocode 3

Price of First License
1,650.00 EUR
RFEM 5
RF-STEEL

Add-on Module

Stress analysis of steel surfaces and members

Price of First License
1,150.00 EUR
RFEM 5
RF-CONCRETE

Add-on Module

Design of reinforced concrete members and surfaces (plates, walls, planar structures, shells)

Price of First License
900.00 EUR
RFEM 5
ec2-for-dlubal

Module Extension for RFEM

Extension of the modules for reinforced concrete design by the Eurocode 2 design

Price of First License
400.00 EUR
RFEM 5

Add-on Module

Analysis of Natural Vibrations

Price of First License
1,150.00 EUR
RFEM 5
RF-STABILITY

Add-on Module

Stability analysis according to the eigenvalue method

Price of First License
1,150.00 EUR
RFEM 5
CONCRETE Columns

Add-on Module

Reinforced concrete design according to the model column method (method based on nominal curvature)

Price of First License
700.00 EUR
RFEM 5
RF-TIMBER Pro

Add-on Module

Timber design according to Eurocode 5, SIA 265, and/or DIN 1052

Price of First License
1,250.00 EUR
RFEM 5
RF -DYNAM Pro - Equivalent Loads

Add-on Module

Seismic and static load analysis using multi-modal response spectrum analysis

Price of First License
850.00 EUR
RFEM 5
RF-MAT NL

Add-on Module

Consideration of nonlinear material laws

Price of First License
1,450.00 EUR
RFEM 5
RF-CONCRETE Add-on Module Deflect for RFEM | Tensile Structures - Calculation of Analytical Deformation

Add-on Module

Analytical deformation analysis of plate structures consisting of reinforced concrete

Price of First License
450.00 EUR
RFEM 5
RF-IMP

Add-on Module

Generation of equivalent geometric imperfections and pre-deformed initial structures for nonlinear calculations

Price of First License
850.00 EUR