Just be sure you look into all the detailing requirements of such a system. I suggest you read through the AISC Seismic Design manual to see what has to be done in order to benefit from the R=6 of a SCBF system.
Good Luck!
Meshing a shear wall is much more accurate to the actual behavior. However, complex shear walls in ETABS are extremely tricky to mesh. I usually assign automesh to each wall pier and assign a maximum mesh size equal to 24". The tricky part is getting the mesh to work. You must make sure that...
Generally, we just use ETABS for the analysis of concrete shear walls and concrete moment frames. Once we are able to limit the drift, we can output the forces from ETABS into a spreadsheet for design. We design the piers of the shears walls for flexure and axial loads using PCA Column. We...
Some seismic codes require the base shear of the modal analysis to be within a certain percentage of the code calculated base shear. This value is 80% in ASCE 7-05. The scale factor is used to scale the calculated ETABS base shear value to at least 80% of the code value.
sundy,
I have just recently encountered this problem myself. ETABS has more than more steel design module; a non-composite steel frame and composite steel frame. More than likely, those beams are being treated as composite beams by ETABS. In order to have the program design those beams, you...
I set the modifier for f22 equal to 0.70 when modeling the cracks of a shear wall. For framing elements (like coupling beams and moment frames), I set I33 equal to 0.35 to model the cracking.
