Does RF-STEEL AISC perform torsion design per Design Guide No. 9?


Yes, the AISC module will detect if there are bending or torsional forces on a member and design accordingly per Design Guide 9. The add-on module combines the shear stresses due to bending and axial loads calculated by RFEM and shear stresses calculated using St. Venant's Torsion to make design checks per Design Guide No. 9. 

The Steel AISC module also has the option under "Details" to activate the RF-STEEL Warping Torsion add-on module extension where a nonlinear warping torsion analysis is performed using 7 degrees of freedom. Normal and shear stresses on the member are independently determined from the AISC Design Guide No. 9. The loading used in this extension is taken directly from RFEM for analysis. 


Steel AISC Design Guide No. 9


[1]   ANSI/AISC 360-16, Specification for Structural Steel Buildings



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RFEM Main Program
RFEM 5.xx

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Structural engineering software for finite element analysis (FEA) of planar and spatial structural systems consisting of plates, walls, shells, members (beams), solids and contact elements

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RSTAB 8.xx

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The structural engineering software for design of frame, beam and truss structures, performing linear and nonlinear calculations of internal forces, deformations, and support reactions

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RFEM Steel and Aluminum Structures

Add-on Module

Design of steel members according to the American standard ANSI/AISC 360

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