Abstract
The predicted damages of existing airports after earthquake have been investigated recognizing their important roles at the time of disaster. In the improvement of the ground to strengthen its deformation resistance, rational improvement area should be determined on the basis of the performance-based specification instead of conventional descriptive specification leading to the whole improvement of liquefiable area. In this study, a stochastic method is proposed for evaluating the effect of partial and rational soil improvement for liquefiable ground. The validity of the proposed method is verified by conducting an experiment in the use of underwater shaking table. In addition, a case study is numerically conducted for a model airport.