MODELING OF NONLINEAR CHARACTERISTICS OF POLYMER MATERIAL WHICH CAN BE USED TO CALUCULATE THE DYNAMIC RESPONSE OF POLYMER - ISOLATED UNDERGROUND STRUCTURE

Abstract

We have developed the new seismic countermeasure for the under ground structure based on new concept. A polymer material whose stiffness is quite flexible is embedded both sides of the tunnel, which we call "polymer isolated method. " A nonlinear characteristics of the polymer material are different from those of a soil. We, therefore, examine how to model the nonlinear characteristics of the polymer material, in order to calculate the seismic performance of polymer-isolated underground structure by using dynamic analysis. In this study, the applicability of the constitutive model of the Hyperbolic model and the GHE model for modeling the polymer is examined. It becomes clear that the constitutive model, such as hyperboolic model and GHE model, can be used to analyze the polymer-isolated underground structure.