STUDY ON RESTORING FORCE CHARACTERISTICS OF AGED RAIL COLUMNS OF RAILWAY TRANSFER OVERBRIDGE

Abstract

When evaluating seismic resistance of overbridges constructed using aged rails, there have been cases in which the non-linear characteristics were calculated by assuming steel member with an H-shaped cross-section having perfect elastoplasticity, and a model beyond the yield point therefore do not understand whether it is currently provided. The purpose of this research was to determine the restoring force characteristics of aged rail columns experimentally. In particular, cyclic loading tests were performed on aged rail columns under constant axial force to determine the hysteresis curves. And the hysteresis curve models are determined by using obtained restoring force characteristics.