DETECTING METHOD FOR NON-LINEAR CHARACTERISTICS OF GROUND USING STRONG GROUND MOTION

Abstract

 This report proposes a simple detecting method for non-linear characteristics of surface layer of the ground. Calculating time variation of dominant period and acceleration amplitude from ground motion record, relative displacement is calculated. The change of acceleration and displacement can be expressed in the characteristic diagram, then non-linear characteristics is known from the shape of the diagram. In the case of subsoil liquefaction, the shape is widely spread and some values which indicate non linear characteristics can be known.