Standards

In addition to the basic combination rules of EN 1990, there are other combination conditions for actions on road bridges specified in EN 1991‑2 that must be taken into account. RFEM and RSTAB provide automatic combinatorics that can be activated in the General Data when selecting the standard EN 1990 + EN 1991‑2. The partial safety factors and combination coefficients depending on the action category are preset when selecting the respective National Annex.

The fundamental requirements of a structural system are (according to the basis of structural design) sufficient ultimate limit state, serviceability, and resistance. Structures must be designed in such a way that no damage occurs due to events such as the impact of a vehicle.

In addition to determining loads, some particularities concerning the load combinatorics in timber design have to be considered. Contrary to steel structures, where the largest loading results from all unfavorable actions, in timber construction, the strength values depend on the load duration and timber humidity. Special characteristics have to be considered as well for the serviceability limit state design. The following article discusses the effects on the design of wooden elements and how this is possible with RSTAB and RFEM.

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)
• EN 1990 + EN 1991-2; Road bridges
• EN 1990 + EN 1991-3; Cranes
• EN 1990 + EN 1997
• to DIN 1055-100:2001-03
• DIN 1055-100 + DIN 1052:2004-08 (timber)
• DIN 1055-100 + DIN 18008 (Glass)
• DIN 1052 (simplified) (timber)
• DIN 18800:1990
• ASCE 7‑10
• ASCE 7-10 NDS (Wood)
• ACI 318-14
• IBC 2015
• CAN/CSA S 16.1-94:1994
• NBCC: 2005
• 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)
• 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)
• UNI EN 1990/NA:2007-07 (Italy)
• IS EN 1990:2002 + NA:2010 (Ireland)
• LVS EN 1990:2003/NA:2010 (Latvia)
• 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)
• NS EN 1990/NA:2008 (Norway)
• ÖNORM EN 1990:2007-02 (Austria)
• NP EN 1990:2009 (Portugal)
• PN EN 1990/NA:2004 (Poland)
• SR EN 1990/NA:2006-10 (Romania)
• SIST EN 1990: 2004/A1:2005 (Slovenia)
• SS EN 1990:2008 (Singapore)
• SS EN 1990/BFS 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 (the United Kingdom)
• TKP EN 1990/NA:2011 (Belarus)
• CYS EN 1990:2002 (Cyprus)

Use the "Independent mesh preferred" option in the FE mesh settings to create an independent FE mesh for the integrated objects. This allows you to generate a significantly more detailed and precise FE mesh for individual objects that are integrated into one another.

In the "Edit Section" dialog box, you can display the buckling shapes of the Finite Strip Method (FSM) as a 3D graphic.