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30.07.2024

Barre de compression à un angle selon la Section E5 de l'AISC

Comment calculer une barre en compression à un angle selon la Section E5 de l'AISC ?


Réponse:

Selon la Section E5 de l'AISC, les effets de l'excentrement sur les barres à angle simple peuvent être négligés lorsque les conditions suivantes sont remplies :

  • Members are loaded at the ends in compression through the same one leg
  • Members are attached by welding or by connections with a minimum of two bolts
  • No intermediate transverse loads
  • Lc / r ≤ 200 [checked by RFEM]
  • For unequal leg angles, the ratio of long leg width to short leg width, bl/bs is less than 1.7 [checked by RFEM]

Under the Strength Configuration, activate the "Use effective slenderness ratio acc. to E5" option. Choose between planar or space truss, then select whether the leg is connected though the longer or shorter leg.


After solving the calculation, the result is presented under Design Check EE2900. In cases where section E5 requirements are not met, RFEM proceeds with evaluating the member for combined axial load and flexure according to Chapter F and H.


Auteur

Cisca est responsable du support technique client et du développement des logiciels Dlubal pour le marché nord-américain.