A STUDY ON ROTATIONAL DEFORMATION OF UNDERGROUND STRUCTURES USING RESPONSE DISPLACEMENT METHOD

Abstract

 Response displacement method is used in seismic designing of underground structures. In both axial deformation and rotational deformation, special solutions of differential equation which are calculated by cyclic boundary, are available so as to be simple calculation. This report proposes conducts of boundary conditions of bending equation of beam on elastic springs and non-linear calculation method using bi-linear model which is applied to materials of beam and soil spring. Calculation with sinusoidal regular wave and bi-linear characteristics is useful for improvement of response displacement method. This improvement is applied for estimation of superannuated underground structures.