ABSTRACT
Systematic studies on soil dynamics and geotechnical earthquake engineering started in the US after the Niigata and Anchorage earthquakes of 1964. The amount of literature generated in 3-decades around the world has helped in earthquake hazard mitigation. However several problems still defy clear understanding. Three such problems, e.g. liquefaction, seismic displacements of rigid retaining walls, and dynamic soil-pile-structure interaction have been briefly described.
