Abstract
We conducted hybrid on-line tests to study the behavior of soft clay ground during an earthquake. The objective site has a quay on the soft clay ground. We showed that we could estimate the maximum acceleration from the shear strength and the shear stiffness of the clay during an earthquake. If the shear stress of the clay reaches the shear strength during an earthquake motion, the maximum acceleration decreases but the strain does not change. We showed that the void ratio decreased and consolidation yield stress increased because of the ground settlement after earthquake.
