Reserch interest and reserch conducted: (a) Stress-strain conditions in
the NGI type direct simple shear test, (b) Fundamental aspects of the
cyclic and dynamic behavior of clays, silts and sands under uniform and
irregular cyclic loads, (c) Small-strain cyclic and dynamic behavior of
soils, (d) Liquefaction mechanism using nonlinear computer models and
case history studies, (e) Behavior of soil-nailed excavations during
earthquakes using centrifuge modelling, (f ) Development of geotechnical
site data bases and their utilization in seismic microzoning using GIS.