ANALYTICAL STUDY ON SOIL LIQUEFACTION DUE TO LONG DURATION EARTHQUAKES WITH LOW ACCELERATION

Abstract

 Effective stress analyses were conducted in order to know effect of input earthquakes and shape of liquefaction strength curves on soil liquefaction. As a result, it was found that long duration earthquakes may bring on severe soil liquefaction in consequence of amplification of earthquake motion through subsurface layer even though its amplitude at base is small, and soil liquefaction due to such long duration earthquakes with low acceleration is largely affected by liquefaction strength for a large number of loading cycles. Results revealed that both response of subsurface layer and liquefaction strength for a large number of loading cycles should be accurately considered in assessment for soil liquefaction potential against long duration earthquakes.