Abnt Nbr 15512
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The first parameter for the analysis of structural stability under static loading in horizontal direction is the modal analysis of the z axis, which is the axis perpendicular to the bending plane that is under the geometrical axis. Z-axis design takes into account all actions of the system on its cross-section (axial compression and tension loads, bending, shear and torsion). In the design of cold-formed steel structures, the modal analysis of the z axis is often performed in accordance with the design rules of Eurocode (EN1993-1-3:2010, 2010). The modal analysis of z axis relates to the study of an elevational plane in this direction, which is termed as the grading plane or the z plane of the z axis. The grade of the z plane is the z component of the maximum elevation of the structural surface,
The second parameter for the analysis of the static stability of a cold-formed steel structure is the design history (changes) of the surface. In the design process of cold-formed steel structures, the design history of the project is considered in order to design a safe cold-formed steel structure. The design history of a cold-formed steel structure is called 'Design history'. The design history is the data used to evaluate the distribution of the surface grades. In this way, the designer can identify the potential for progressive collapse of the structure and can change the surface properties, thus increasing or reducing the stiffness. d2c66b5586