5035x
001604
2019-11-07

Designing a Welded Connection of an I-Section

Two methods are available for the design of a weld according to EN 1993-1-8 [1]. The engineer can use the direction-related or the simplified method for the design.

Basically, the direction-related method is more cost effective, whereas the simplified method has identical results parallel to the axis of the weld in case of only shear stresses in the fillet weld area.

In the present example of an HEA cross-section, the design with the simplified method according to EN 1993-1-8, Clause 4.5.3.3 will be carried out quickly and easily with the SHAPE-THIN stand-alone program.

The acting internal forces can be entered in Table 3.1:
N = -1,190 kN
Vy = 180 kN
Vz = 370 kN
My = 225 kNm
Mz = 26 kNm

The design value of the shear strength for the weld is calculated with the formula


to

The value in SHAPE-THIN must be adjusted in the material properties, because it is different from the design yield strength for the cross-section design (see Figure 02).

On the side of the loading, the equivalent stress is calculated as a resultant force:

This must be set in the calculation parameters in SHAPE-THIN, because the default setting corresponds to the equivalent stress according to Mises (see Figure 03).

The design result in SHAPE-THIN is directly shown graphically. The ratio of the welds on the flange and web can be determined quickly by means of the color gradient.


Links
References
  1. EN 1993-1-8: Bemessung und Konstruktion von Stahlbauten – Teil 1-8: Bemessung von Anschlüssen. Beuth Verlag GmbH, Berlin, 2010
  2. Wagenknecht, G..: Stahlbau-Praxis nach Eurocode 3 - Band 2: Verbindungen und Konstruktionen, 4. Auflage. Berlin: Beuth, 2014
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