SEISMIC RESPONSE ANALYSIS FOR FOUNDATION OF LARGE-SCALE STRUCTURE ON DISCONTINUOUS ROCK—AS A BASIC EXAMPLE USED THE 2011 OFF THE PACIFIC COAST OF TOHOKU EARTHQUAKE—

Abstract

 The authors are analyzed the large-scale structure build on the discontinuous rock foundation by the seismic response analysis with non-linear FEM considering the rock joint system using actual seismic records. The seismic response analysis was performed by a kind of the equivalent continuum finite element method with Multiple Yield Model (MYM) introducing cyclic loading elastic-plastic deformation characteristics of rock joints. The analytical results were compared with the observed the seismic response of The 2011 off the Pacific coast of Tohoku Earthquake (Mw = 9.0) and other. As a result, the adequate modeling such as discontinuities and appropriate setting of mechanical properties of rock and discontinuities gives the good result corresponding with the observations. We confirmed the applicability of MYM to seismic response.