ABSTRACT
The basic material applied in Poland for building walls is Autoclaved Aerated Concrete and ceramic elements. Both materials cover over 60% of the whole market of wall masonry elements. The walls were examined monotonically in one cycle until the damage at various initial values of compressive stress acting perpendicularly to the support joints. The cracking of stripes under the windows of all models with the openings ran mostly through the support and butt joints and was located in the region of corners. Strain angles in the moment of cracking of the reinforced elements with the opening of A, B and C type were, at the smallest compression stresses, over 120%, 70% and 100%, respectively, greater than in non-reinforced models. Shape deformations in the moment of damaging of reinforced elements were essentially greater than the elements without the reinforcement in all the elements with the opening of A and B type.
