A THEORETICAL STUDY ON THE ANALYTICAL MODEL USED IN THE SEISMIC DESIGN FOR UNDERGROUND VERTICAL SHAFT STRUCTURES ―AN OVERALL SUMMARY OF THE CHARACTERISTICS OF THE MODELS―

Abstract

 This note makes an overall summary of the major points of modeling and analysis performance of several seismic analysis models for underground vertical shaft structures that the author has published over the past few years. In the previous reports, single analysis model was taken up each time, and discussions were conducted by demonstrating practical calculation examples. As a result, usable numerical data for five types of analysis models have been accumulated.

 In this note, using them, a simultaneous analysis dealing with the same example is performed, and summarized the characteristics of each model by comparing the calculation results. The five types are three types of 3D-FEM technique that integrate the ground and underground structure together: solid element model, shell element model, and beam element model, and two types of seismic deformation method in which the structure is separated from the ground: conventional beam-and-spring model, and the improved model that is an improvement of it.