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No vertical or lateral displacement at the bottom restraint.
All other restraints are restrained against horizontal displacement but are on rollers vertically.
Through matrix manipulation, the true displacements at the ends of each member are computed for each given loading condition. Then the exact end moments and forces are determined using the computed displacements. If member properties are altered, its effect is reevaluated in the above manner.
The sign conventions follow the right hand rule. Currently Eriksson Wall ignores local effects such as the concrete ‘columns’ on each side of a door or window. The analysis engine does, however, take the door or window into account in the stiffness matrix.
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An elastic second order analysis is performed when second order effects are set to P-Delta. In this analysis, the deformed geometry of the wall panel is included in the equilibrium equations so that the additional moments due to the deflected shape are included. The program always captures these second order effects from the temperature gradient and the initial bow. Enabling P-Delta ensures we also capture these effects from the lateral loads on the panel.
Moment Magnification
lenderness Slenderness may be neglected if kl/r < 22, where
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