8A. ANALYSIS Part 1: NEW BUILDINGS

CHAPTER 8A 'ANALYSIS' 38 IMPORTANT ADDITION In the new version of SCADA Pro and in the Eurocode scenarios, the lack of torsion is displayed graphically in a plan view in green, the circle of inertia in red and a rectangle in blue, which refers to the criterion of limitation of eccentricity. The circle and the ellipse relate to the criterion of torsional drift Rx >= Is i.e. the torsion radius is greater than or equal to the inertia radius. The check is performed per direction and is met for both directions when the red circle is contained in the inertia ellipse (as in the picture above). The second check concerns the eccentricities eox and eoz which are the x and z distance of the centre of torsion Po from the centre of mass M. These eccentricities must be less than 0.30*rx and 0.30*rz respectively. This condition is fulfilled when Po is inside the blue square (as in the figure above). Recall that the centre of mass M and the bulkhead node coincide after the analysis is performed and the masses are calculated because the initial calculation of the bulkhead node is based only on the geometry of the nodes.