Generation of Snow Loads

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:

  • European Union | Flag EN 1991-1-3 (incl. National Annexes)
  • EN-US | Flag ASCE 7
  • Canada | Flag NBC
  • Switzerland | Flag SIA 261
  • Spain Flag CTE DB-SE-AE
  • People's Republic of China | Flag GB 50009
  • India | Flag IS 875

Generation of Wind Loads

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:

  • European Union | Flag EN 1991-1-4 (including National Annexes)
  • EN-US | Flag ASCE 7
  • Spain Flag CTE DB-SE-AE
  • People's Republic of China | Flag GB 50009

Generating Member/Line Loads from Area Loads

Use all types of loads without any difficulty. You can automatically convert the area loads into member loads or line loads (RFEM).
In the case of member loads from area loads, you have to define a plane via corner nodes or select cells in the graphic. Then the rest works by itself.

Generating Member Loads from Free Line Loads

Also for pure member models, such as girder grillages, there is a useful feature for you. Here you can define free line loads (for example, from conveyor belts) and transfer them proportionally to members.

Standards

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:

  • European Union | Flag EN 1990
  • European Union | Flag EN 1990 | Timber
  • European Union | Flag EN 1990 | Road Bridges
  • European Union | Flag EN 1990 | Cranes
  • European Union | Flag EN 1990 | Geotechnical Engineering
  • European Union | Flag EN 1990 | Base + Timber
  • European Union | Flag EN 15512
  • EN-US | Flag ASCE 7
  • EN-US | Flag ASCE 7 | Timber
  • EN-US | Flag ACI 318
  • EN-US | Flag IBC
  • Canada | Flag CAN/CSA
  • Canada | Flag NBC
  • Canada | Flag NBC | Timber
  • Brazil Flag NBR 8681
  • India | Flag IS 800
  • Switzerland | Flag SIA 260
  • Switzerland | Flag SIA 260 | Timber
  • EN-GB | Flag BS 5950
  • People's Republic of China | Flag GB 50009
  • People's Republic of China | Flag GB 50068
  • People's Republic of China | Flag GB 50011
  • Spain Flag CTE DB-SE
  • South Africa Flag SANS 10160-1
  • Mexico Flag NTC
  • Mexico Flag NTC | Timber
  • Australia | Flag AS/NZS 1170.0
  • Russia | Flag SP 20.13330:2016
  • Turkey TSC | Steel

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

  • DE | Flag DIN | 2012-08 (Germany)
  • European Union | Flag CEN | 2010-04 (European Union)
  • Bulgaria | Flag BDS | 2013-03 (Bulgaria)
  • EN-GB | Flag BS | 2009-06 (United Kingdom)
  • CS | Flag CSN | 2015-05 (Czech Republic)
  • Cyprus Flag CYS | 2010-06 (Cyprus)
  • Denmark Flag DK | 2013-09 (Denmark)
  • Greece Flag ELOT | 2009-01 (Greece)
  • Estonia Flag EVS-EN 1990:2002+NA:2002 (Estonia)
  • Ireland Flag IS | 2010-04 (Ireland)
  • Lithuania Flag LST | 2012-01 (Lithuania)
  • Luxemburg Flag LU | 2020-03 (Luxembourg)
  • Latvia Flag LVS | 2015-01 (Latvia)
  • Malaysia Flag MS | 2010-02 (Malaysia)
  • Belgium Flag NBN | 2015-05 (Belgium)
  • Flag of the Netherlands NEN | 2011-12 (Netherlands)
  • France Flag NF | 2011-12 (France)
  • Portugal Flag NP | 2009-12 (Portugal)
  • Norway Flag NS | 2016-05 (Norway)
  • Austria | Flag ÖNORM | 2013-03 (Austria)
  • Poland Flag PN | 2010-09 (Poland)
  • Finland Flag SFS | 2010-09 (Finland)
  • Slovenia Flag SIST | 2010-08 (Slovenia)
  • Romania Flag SR | 2006-10 (Romania)
  • Singapore Flag SS | 2008-06 (Singapore)
  • Sweden Flag SS | 2019-01 (Sweden)
  • Slovakia Flag STN | 2010-01 (Slovakia)
  • Belarus Flag TKP | 2011-11 (Belarus)
  • Spain Flag UNE | 2010-07 (Spain)
  • Italy Flag UNI | 2010-10 (Italy)

Load Cases and Combinations

To ensure that your structures can cope with all loads, take a look at the "Load Cases and Combinations" dialog box. Here you can create and manage load cases. Furthermore, you can also generate action and load combinations as well as design situations here. You can assign the action categories of the selected standard to the individual load cases. If you have assigned several loads to an action category, they can act simultaneously or alternatively (for example, either wind from the left or wind from the right).

Combination Expressions

For the combination of actions, you have come to the right place. If you use them 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). Optionally, you can also integrate imperfections in the combination and determine load cases that should not be combined with other load cases (for example, construction load for roof not combined with snow load).

Accidental Design Situation

Do your structures also have to withstand unusual conditions? Then select the "accidental" design situation. Here, accidental actions such as earthquake, explosion loads, collisions, and many others, are considered automatically. Furthermore, when using German standards, you can select the "Accidental - Snow" design situation to consider the "North German Plain" automatically as well.

Action Combinations

Do you want to combine actions? Then use this feature. Here, the actions are automatically superimposed in accordance with combination expressions and then displayed as "action combinations". You can 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.

Load Combinations

RFEM 6 offers you a wide range of helpful and efficient functions for working with load combinations. You can add the load cases included in load combinations together and then calculate them in consideration of the corresponding factors (partial safety and combination factors, coefficients regarding consequence classes, and so on). Generate the load combinations automatically in compliance with the combination expressions of the standard. You can perform the calculation according to the linear static analysis, second-order analysis, or large deformation analysis, as well as for post-critical analysis. Optionally, you can define whether the internal forces should be related to the deformed or non-deformed structure.

Result Combinations

Rely on RFEM 6 even in the case of result combinations. First, you can have the contained load cases calculated in the result combinations. Then, the results are superimposed by taking into account the corresponding factors. In the result combinations, you can superimpose the results of load cases, load combinations, and other result combinations. Internal forces are added together by default. However, you have the option of a square addition, which is relevant for dynamic analysis.

Modifying Stiffnesses / Considering Initial Deformations

Do not lose track of stiffnesses and initial deformations. In the individual load cases or combinations, you have 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. You can also consider initial deformations from other load cases or load combinations.