EVALUATION OF RESIDUAL DEFORMATION AFTER EARTHQUAKE BY MEANS OF K0 ON-LINE SEISMIC RESPONSE EXPERIMENT

The objective of this paper is to evaluate earthquake-induced residual displacement at a ground. I have developed K0-controled experiment device. This device achieves K0 condition during consolidation, undrained cyclic shear and reconsolidation process. The relation between liquefaction-induced residual displacement and duration and overconsolidation ratio OCR are studied by the method. As a result, volumetric strain εv and residual shear strain γres variation with different types of earthquake motions and OCR was examined. We suggested the residual deformation index which could evaluate both residual shear strain and residual volmetric strain. It was associated with accumulated strain γacm.