Shaking Table Test Using Full-scale Model for Lateral Resistance Force of Ballasted Tracks During Earthquake

Abstract

In Japan where large earthquakes frequently occur, it is important to increase the resistibility of railway structures to earthquakes. The authors performed a shaking table test using a full-scale model to evaluate the lateral resistance force of the ballasted track during earthquakes. In this study, the shaking table test was attempted under test conditions under which the sleeper is given the lateral force to induce track buckling. Two kinds of cross sections of ballasted track for the full-scale model were applied: a straight track and a curved track to evaluate the influence of the difference of the cross section of ballasted track on the lateral resistance force. The results of the shaking table test clarified that the lateral resistance force of the ballasted track decreased during shaking, and the lateral sleeper displacement increased significantly by lateral force smaller than the lateral resistance force of the ballasted track after shaking. In addition, it is considered that the influence of the cross section of ballasted track on the lateral ballast resistance force during shaking and after shaking is small.