STUDY ON THE PARAMETER OF EVALUATING CUMULATIVE DAMAGE OF ALTERNATIVE DEFORMED STEEL MEMBERS : Proposal of the method .of evaluation of cumulative damage and it's practical application: depending on constant amplitude alternative loading experiments of damage concentrated anti-seismic members using ultra low yield point steel

Abstract

This is a study on the cumulative damage of steel members caused by seismic response. Miner's law is accurately applicable to the seismic response of the steel members which this study covers. Generally maximum amplitude law is convenient and practical, however it is too biased to the safer side to apply to the seismic response of small amplitude. The ratio of the cumulative damage value by the Miner's law and that by the maximum amplitude law is very related to the time passed of earthquake ground motion. This study corrects the maximum amplitude law by experiments and analyses.