ABSTRACT
The accuracy of the formulae derived for the determination of the top deflection, the fundamental frequency and the critical load is established. The accuracy of the relevant equations will be checked with the determination of the maximum deflection, the fundamental frequency and the critical load of bracing systems. These systems are created in such a way that they represent characteristic practical situations and, in some cases, to model extreme cases in order to establish realistic error ranges for the equations in question. The shear walls and the core are only needed to create realistic three-dimensional bracing systems with a mixture of bracing units. When the bracing system subjected to horizontal load is symmetric and the resultant of the horizontal load passes through the shear centre of the bracing system, no rotation occurs and the maximum deflection of the shear centre axis is also the maximum deflection of the building.
