FEA Software RFEM | Automatic Generation of Combinations

Structural Analysis & Engineering Software

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

Due to the modular software concept, you can connect the basic program RFEM with the corresponding add‑ons in order to meet your individual requirements.

Automatic Generation of Load Combinations

RFEM provides automatic generation of load and result combinations according to Eurocode and other international standards in compliance with the corresponding combination expressions. In a clearly arranged window, you can copy, add, or renumber load cases, for example. Load cases and combinations are specified in Tables 2.1 to 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 but not for result combinations.

    The first option allows for automatic analysis of all load case results (internal forces, deformations, etc.) of selected elements. Then, the program will generate only those combinations which 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 so-called "action combinations". It is possible to define which action combinations will be eventually 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 stiffness of materials, cross-sections, nodal, line and surface supports, as well as member end releases and line hinges for all or the selected members. Furthermore, it is possible to consider initial deformations from other load cases or load combinations.

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Event Invitation

2022 NASCC: The Steel Conference

Conference 23 March 2022 - 25 March 2022

Event Invitation

International Mass Timber Conference

Conference 12 April 2022 - 14 April 2022

Event Invitation

Structures Congress 2022

Conference 21 April 2022 - 22 April 2022

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Effective BIM Workflows Between RSTAB & RFEM and IDEA StatiCa

Webinar 5 August 2021 11:00 AM - 12:00 PM CEST

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Glass Design with Dlubal Software

Webinar 8 June 2021 2:00 PM - 2:45 PM CEST

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Blast Time History Analysis in RFEM

Webinar 13 May 2021 2:00 PM - 3:00 PM EDT

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Timber Beam and Surface Structures | Part 2: Design

Webinar 11 May 2021 2:00 PM - 3:00 PM CEST

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Plate and Shell Buckling Utilizing Dlubal Software

Webinar 30 March 2021 2:00 PM - 2:45 PM CEST

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CSA S16:19 Steel Design in RFEM

Webinar 10 March 2021 2:00 PM - 3:00 PM EDT

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The Most Common User Errors With RFEM and RSTAB

Webinar 4 February 2021 2:00 PM - 3:00 PM BST

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ADM 2020 Member Design in RFEM

Webinar 19 January 2021 2:00 PM - 3:00 PM EDT

Dlubal Info Day

Dlubal Info Day Online | 15 December 2020

Webinar 15 December 2020 9:00 AM - 4:00 PM BST

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Stability Design in Steel Construction with RFEM and RSTAB

Webinar 1 December 2020 2:00 PM - 2:45 PM BST

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FEA Troubleshooting and Optimization in RFEM

Webinar 11 November 2020 2:00 PM - 3:00 PM EDT

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Soil-Structure Interaction in RFEM

Webinar 27 October 2020 2:00 PM - 2:45 PM BST

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Webinar 30 September 2020 2:00 PM - 3:00 PM EDT

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Documenting Results in the RFEM Printout Report

Webinar 25 August 2020 2:00 PM - 2:45 PM CEST

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Webinar 20 August 2020 2:00 PM - 3:00 PM EDT

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How to Be More Productive Using RFEM

Webinar 7 July 2020 3:00 PM - 4:00 PM CEST

RFEM 5
RF-STEEL EC3

Add-on Module

Design of steel members according to Eurocode 3

Price of First License
1,480.00 USD
RFEM 5
RF-STEEL

Add-on Module

Stress analysis of steel surfaces and members

Price of First License
1,030.00 USD
RFEM 5
RF-CONCRETE

Add-on Module

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

Price of First License
810.00 USD
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
360.00 USD
RFEM 5

Add-on Module

Dynamic analysis of natural frequencies and mode shapes of member, surface, and solid models

Price of First License
1,030.00 USD
RFEM 5
RF-STABILITY

Add-on Module

Stability analysis according to the eigenvalue method

Price of First License
1,030.00 USD
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
630.00 USD
RFEM 5
RF-/TIMBER Pro

Add-on Module

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

Price of First License
1,120.00 USD
RFEM 5
RF -DYNAM Pro - Equivalent Loads

Add-on Module

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

Price of First License
760.00 USD
RFEM 5
RF-MAT NL

Add-on Module

Consideration of nonlinear material laws

Price of First License
1,300.00 USD
RFEM 5
RFEM add-on module RF-CONCRETE Deflect | Analytical deformation analysis of tensile structures

Add-on Module

Analytical deformation analysis of plate structures consisting of reinforced concrete

Price of First License
400.00 USD
RFEM 5
RF-IMP

Add-on Module

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

Price of First License
760.00 USD