Member Transverse Stiffeners in RFEM 6 and RSTAB 9

Technical Article on the Topic Structural Analysis Using Dlubal Software

  • Knowledge Base

Technical Article

Member transverse stiffeners are available as an option when editing members in RFEM 6 and RSTAB 9. They can be taken into account when verifying the shear resistance of web plates in order to limit the buckling fields. In RFEM 6 and RSTAB 9, member transverse stiffeners are organized as “Type for Members” (Image 1).

To define member transverse stiffeners, open the dialog box “New Member Transverse Stiffener”. This dialog box includes the main properties of each stiffener type (Image 2). First, you have to define the stiffener type. The following types are currently available: flat stiffeners, end plates at the start and end of the member, channel sections, angle profiles (connection of both legs to the stiffened web), connected columns at the start and end of the member, and warping restraints. The position of the stiffeners can be defined with an absolute or a relative input, and you can easily switch between the two. Please note that the entered positions apply to all members to which the member transverse stiffeners are assigned. If the members have different lengths, the absolute and relative position specifications differ. Then, automatic conversion is not possible.

The "Multiple" check box allows you to add more stiffeners of the same type to a member (Image 3). You can specify the number of stiffeners and the offset in the Parameters section of the dialog box. In this section, information about the material and dimensions of the stiffener is required as well. If you have activated a design add-on (for example, Steel design or Aluminum design), the check box “Consider stiffener” is also available here. By activating it, you can include the stiffener in the associated add-on. Hence, only member transverse stiffeners for which this check box is activated will be considered in the design.

You can use member stiffeners to define the boundary conditions for warping when calculating members with 7 degrees of freedom. The warping is considered as a local member internal force; therefore, no further global support conditions have to be defined. In RFEM 6 and RSTAB 9, the resulting warp spring is automatically calculated for each transverse stiffener type and the given cross-section. Please note that the displayed resulting warp spring stiffness is strictly informative when using the member transverse stiffeners for design.

You can also define a full warping restraint or a user-defined warping restraint directly by using the "Warping restraint" stiffener type, as shown in Image 4.

Finally, the member transverse stiffeners can be assigned to one or more members using the "Edit Member" dialog box, by selecting them in the "Member Transverse Stiffener" dialog box, or via the input table (Image 5). It is also possible to assign the member transverse stiffeners to a member set. In this case, the relative position of the stiffener types then refers to the length of the entire member set. Please note that the stiffener can be assigned either to a member or to the superordinate member set.

Author

Irena Kirova, M.Sc.

Irena Kirova, M.Sc.

Marketing & Customer Support

Ms. Kirova is responsible for creating technical articles and provides technical support to the Dlubal customers.

Keywords

Member transverse stiffeners Members Warping restraint

Links

Write Comment...

Write Comment...

  • Views 357x
  • Updated 6 September 2022

Contact Us

Contact Dlubal

Do you have any further questions or need advice? Contact us via phone, email, chat or forum or search the FAQ page, available 24/7.

+49 (0) 9673 9203-0

[email protected]

Online Training | English

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

Online Training 8 December 2022 9:00 AM - 1:00 PM CET

Online Training | English

RFEM 6 | Students | Introduction to Reinforced Concrete Design

Online Training 12 December 2022 4:00 PM - 5:00 PM CET

Stress Analysis of Surfaces and Members in RFEM 6

Stress Analysis of Surfaces and Members in RFEM 6

Webinar 15 December 2022 2:00 PM - 3:00 PM CET

New Features in RFEM 6 and RSTAB 9

New Features in RFEM 6 und RSTAB 9

Webinar 21 December 2022 2:00 PM - 3:00 PM CET

Online Training | English

RFEM 6 | Basics

Online Training 19 January 2023 9:00 AM - 1:00 PM CET

Modeling and Design of CLT Panels in RFEM 6

Modeling and Design of CLT Panels in RFEM 6

Webinar 19 January 2023 2:00 PM - 3:00 PM CET

Online Training | English

Eurocode 2 | Concrete Structures According to DIN EN 1992-1-1

Online Training 26 January 2023 9:00 AM - 1:00 PM CET

Online Training | English

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

Online Training 2 March 2023 9:00 AM - 1:00 PM CET

Online Training | English

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

Online Training 16 March 2023 9:00 AM - 1:00 PM CET

Online Training | English

RFEM 6 | Dynamic Analysis and Seismic Design According to EC 8

Online Training 30 March 2023 9:00 AM - 1:00 PM CEST

Geotechnical Analysis with Construction Stages in RFEM 6

Geotechnical Analysis with Construction Stages in RFEM 6

Webinar 1 December 2022 2:00 PM - 3:00 PM CET

Online Training | English

RFEM 6 | Students | Introduction to Timber Design

Online Training 25 November 2022 4:00 PM - 5:00 PM CET

Online Training | English

RFEM 6 | Dynamic Analysis and Seismic Design According to EC 8

Online Training 23 November 2022 9:00 AM - 1:00 PM CET

Online Training | English

RFEM 6 | Students | Introduction to Reinforced Concrete Design

Online Training 21 November 2022 4:00 PM - 5:00 PM CET

Online Training | English

RFEM 6 | Students | Introduction to Reinforced Concrete Design

Webinar 21 November 2022 4:00 PM - 5:00 PM CET

Online Training | English

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

Online Training 17 November 2022 9:00 AM - 1:00 PM CET

Interfaces with RFEM 6 Briefly Presented: Archicad and SAF

Interfaces with RFEM 6 Briefly Presented: Archicad and SAF

Webinar 16 November 2022 2:00 PM - 3:00 PM CET

RFEM 6
Hall with Arched Roof

Main Program

The structural analysis program RFEM 6 is the basis of a modular software system. The main program RFEM 6 is used to define structures, materials, and loads of planar and spatial structural systems consisting of plates, walls, shells, and members. The program can also design combined structures as well as solid and contact elements.

Price of First License
4,450.00 EUR
RSTAB 9
Structural Frame and Truss Analysis Software

Main Program

The structural frame & truss analysis and design program RSTAB 9 contains a similar range of functions as the FEA software RFEM, paying special attention to frames and trusses. Therefore, it is very easy to use and for many years, it has been the best choice for the structural analysis of beam structures consisting of steel, concrete, timber, aluminum, and other materials.

Price of First License
2,850.00 EUR