GIS simulation of the geological objects’ soil conditions: Strong motion banks and databases

Abstract

Evaluation of the soil conditions influence on the seismic effect of possible earthquakes includes determination of physical and mechanical conditions of soils and simulation of the effects considering the soil stratum. Thereat mathematical models are based on some assumptions and idealizations. Otherwise strong motion databases and banks give real instrumental data on site effect. The article considers the investigation of soil conditions and their simulation in an indissoluble connection based on the procedure of seismic hazard assessment of the soils of Vladikavkaz. The results of strong-motion databases use (for example, K-NET) for selecting seismic records according to the fundamental characteristics of earthquakes (magnitude, source depth, epicentral distance) and soil conditions of the corresponding stations based on the greatest similarity of the ground models are given. The seismic intensity increments for soils widespread in the territory of Vladikavkaz are obtained. For clay soils with a thickness of about 20 m with the presence of soils of soft plastic consistency, the increment is 1 point relative to the distribution of clay soils of semi-solid consistency with a thickness of up to 5 m. For pebbles with a filler >30%, the increment is 0 points and with a filler <30%, the intensity decreases by 1 point.