Question

The ASCE 7-22 Standard [1], Sect. 12.9.1.6 specifies when P-delta effects should be considered when running a modal response spectrum analysis for seismic design. In the NBC 2020 [2], Sent. 4.1.8.3.8.c gives only a short requirement that sway effects due to the interaction of gravity loads with the deformed structure should be considered. Therefore, there may be situations where second-order effects, also known as P-delta, must be considered when carrying out a seismic analysis.

Using the Timber Design add-on, timber column design is possible according to the 2018 NDS standard ASD method. Accurately calculating timber member compressive capacity and adjustment factors is important for safety considerations and design. The following article will verify the maximum critical buckling strength calculated by the Timber Design add-on using step-by-step analytical equations as per the NDS 2018 standard including the compressive adjustment factors, adjusted compressive design value, and final design ratio.

The three types of moment frames (Ordinary, Intermediate, Special) are available in the Steel Design add-on of RFEM 6. The seismic design result according to AISC 341-22 is categorized into two sections: member requirements and connection requirements.

The results of solid stresses can be displayed as colored 3D points in the finite elements.

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:

• EN 1991-1-4 (including National Annexes)
• 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:

• EN 1990
• EN 1990 | Timber
• EN 1990 | Road Bridges
• EN 1990 | Cranes
• EN 1990 | Geotechnical Engineering
• EN 1990 | Base + Timber
• 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
• SP 20.13330:2016
• TSC | Steel

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

• DIN | 2012-08 (Germany)
• CEN | 2010-04 (European Union)
• BDS | 2013-03 (Bulgaria)
• BS | 2009-06 (United Kingdom)
• CSN | 2015-05 (Czech Republic)
• CYS | 2010-06 (Cyprus)
• DK | 2013-09 (Denmark)
• ELOT | 2009-01 (Greece)
• 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)
• SS | 2019-01 (Sweden)
• STN | 2010-01 (Slovakia)
• TKP | 2011-11 (Belarus)
• UNE | 2010-07 (Spain)
• UNI | 2010-10 (Italy)