For ensuring sage conditions of maintenance of buildings and structures, primary importance is supporting of its due technical state, displaying of its physical depreciation and causes, which determine its technical state. The vibration, among of all types of mechanical effects, is the most dangerous for engineering structures. The destruction of structures comes by vibrational influences under conditions of resonance. This process is very fast and it comes frequently.
The need for strengthening of precast concrete structures in service occurs not only in reconstruction cases because of their physical deterioration but also as a result of seismic effects. In seismic regions (Uzhgorod belongs to those regions with seismicity of 7 points) it is extremely important to make calculations of the structure on seismicity, as well as design and quality of production of precast bearing concrete structures in case of specific loadings.
The urgent problem of automatization of the process of products transportation with a help of vertical chutes under the influence of gravitational forces using elastic elements is considered. The interaction between the object being transported and the elastic elements is defined. Their mutual influence on the transportation speed is determined depending on the contact parameters. The analysis of the object transportation speed changing depending on friction and on the zone of their mutual contact is carried out.
In the article the features of constructions of new kind – non-roll roofs is analyzed. The advantages of this type of constructions is lighted up.