Working with RF-/STEEL AISC
The AISC 360 design option is set according to ASD or LRFD. Then, the load cases, load combinations, and result combinations are selected for design consideration. Load combinations can be generated either manually or automatically according to the ASCE 7 for example in RFEM/RSTAB.
Additional input includes intermediate lateral supports (top/bottom flange bracing), effective lengths for buckling, and other standard-specific design parameters such as the shear lag factor. For the stability analysis, you can specify for each member or set of members whether flexural buckling occurs in the strong or weak axis.
The RF-/STEEL AISC add-on module automatically determines the slenderness ratios and elastic critical buckling loads for both members and sets of members based on the boundary conditions. The elastic critical moment for lateral-torsional buckling required for the lateral-torsional buckling analysis is automatically calculated. The load application point for transverse loads which affects the torsional resistance can be considered in the detail settings. In connection with RFEM/RSTAB, the Direct Analysis Method (Ch. C) can be considered including automatic stiffness reduction factors. In turn, the Effective Length Method (App. 7) can be used instead with Effective Length Factors directly in the module.
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