One of the main characteristics of a soil is the average value of the velocity of shear waves in the soil mass. The use of various geophysical equipment makes it possible to estimate both the velocity of individual soil layers and the averaged value (Vs30) of a subsoil mass. The soil category in all building codes is determined based on this parameter. For modelling and calculating building structures, as well as for assessing the effectiveness of a structural system, it is important to have complete information on subsoil at the building site. One of the limitations is the difference between the natural oscillation period of the building and the predominant period of the soil mass. On the example of existing, strengthened building, as well as having the engineer-geological report of the site, and using our geophysical equipment, the soil category will be assessed based on the determination of the average value of the shear waves. Then synthetic accelerograms for the construction site will be prepared. The effectiveness of the new structural system and its members using for strengthening in the building will be evaluated by finite element analysis of the building model. Finally, the estimation of effectiveness of the structural members have been applied to the strengthened building will be evaluated.
Obtaining various soil parameters required for seismic analysis of a strengthened building and comparing with existing data. Gathering information on the earthquake resisting members of the building and its partial survey. Structural analysis of building and its structures under earthquake loads and estimation the effectiveness of the structures, that have been applied during strengthening.