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2021-03-08

KB 000868 | General Method for Stability Analyses According to EN 1993-1-1 and Buckling in...

In EN 1993-1-1, the General Method was introduced as a design format for stability designs, which can be used for planar systems with any boundary conditions and variable structural height. The design checks can be performed for loading in the main load-bearing plane and simultaneous compression. The stability cases of lateral-torsional buckling and flexural buckling are analyzed from the main supporting plane, that is, about the structural component's weak axis. Therefore, the question often arises how to design in this context flexural buckling in the main load-bearing plane.

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Display Options for 3D Graphics
In addition to the result tables, you can create three-dimensional graphics in RF‑/FRAME‑JOINT Pro and RF‑/JOINTS. This is a realistic representation of a connection to scale.
Influence of Duration of Action on Design Value of Strength
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.
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RF-/JOINTS Timber – Timber to Timber allows you to design main-connected beam joints. This article explains the determination of forces in screws of a beam connected to a torsionally rigid main beam.
Visualization of the shear flow result diagram and acting forces on a timber panel wall
In this article, the design of a timber panel wall with the beam panel thickness type is performed.
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Result Output in Table Form

At first, the governing joint designs are arranged in groups and displayed with the basic geometry of the joint in the first result window. In the other result windows, you can see all fundamental design details.

Dimensions, material properties, and welds important for the connection construction are displayed immediately and can be printed directly. Similarly, export to DXF-file is enabled. The connections can be visualized in the RF-/JOINTS Timber - Timber to Timber module as well as in RFEM/RSTAB.

All graphics can be included in the RFEM/RSTAB printout report or printed directly. Due to the scaled output, an optimal visual check is possible as early as in the design phase.

Window 1.1 General Data

First, select the joint type and the design standard.

The connected members are imported from the RFEM/RSTAB model. The add-on module automatically checks if all geometry conditions are fulfilled.

In addition, the loads are imported automatically from RFEM/RSTAB. In the Geometry window, you can specify the screw parameters (diameter, length, angle, and so on).

RF-/JOINTS Timber - Timber to Timber Add-on Module for RFEM/RSTAB | Design of Direct Timber Connections According to Eurocode 5
  • Design of hinged connections
  • Biaxial inclination of the connected member (for example, a jack rafter joint)
  • Connection of any number of members on one node for the type "Main member only"
  • Screw diameter 6 mm – 12 mm
  • Automatic check of the minimum distance between screws
  • Optional free definition of screw distances
  • Transfer of eccentricity from RFEM/RSTAB
  • Crosswise or parallel screw alignment
  • Definition of up to 16 screws in a row
  • Graphical visualization of joints in the add-on module and in RFEM/RSTAB
  • Performing all required designs

 

Feature 002901 | Plywood Materials According to ANSI/APA PRG 510 Plywood Standard (USA/CAN) in RFEM Material Library

In the material library of RFEM, you can find plywood materials according to the US and Canadian standards ANSI/APA PRG 510 Plywood (USA/CAN).

Frequently Asked Questions (FAQ)
Why it is not possible to design a biaxial bending with the RF‑/JOINTS add-on module?

Do I need to add a line hinge/line release for the CLT wall-to-floor connection in the Building Model add-on?
How can I add counteracting dead loads (0.9*D) in NBC load combinations?
How can I perform member design by case for different settings in the design configuration?
How can I exclude the dead load in NBC load combinations when performing a deflection check?
What is the conservatism factor for CLT in Timber Design?
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