919x
001088
2015-08-17

Influence of Shear Connections on Stability Analysis and Consideration

In stability analysis, all these connection layouts are not considered as lateral and torsional restraints, but as torsional springs.

RF‑/STEEL EC3 offers the following options to take this into account:
~ When using the Equivalent Member Method, you can either adjust the lateral-torsional buckling length Lw in Window 1.5 or 1.6 (see [3] and [4]), or enter the elastic critical moment for lateral-torsional buckling directly (see [1], [2], and [3]). To do this, change the determination of the elastic critical moment for LTB in the "Details" dialog box, "Stability" tab.
~ When using the General Method, you can enter the torsional spring φX' directly in Window 1.7. For notes on the torsional spring calculation, see [1] and [3].

Literature:
[1] Kuhlmann, Feldmann, Lindner, Stroetmann: Eurocode 3 - DIN EN 1993-1-1 mit NA - Kommentar und Beispiele, Beuth Verlag, Ernst & Sohn, 1. edition 2014, pp. III - 147 ff.
[2] Kuhlmann (Ed.): Stahlbau-Kalender 2009, Ernst & Sohn, p. 335 ff.
[3] Mensinger, Möller: Einfluss von Querkraftanschlüssen auf das Biegedrillknicken von Einfeldträgern - Teil 2, Stahlbau 83 (2014), magazine 3, p. 174 ff.
[4] The Steel Construction Institute and The British Constructional Steelwork Association: Simple Joints to Eurocode 3, 2011, p. 20


Author

Mr. Metzkes is responsible for development in the area of steel structures and provides technical support to our customers.

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