Dynamic identification and model updating of the Howa brick chimney, Tokoname, Japan

摘要

This study deals with dynamic identification and model updating of the Howa brick chimney to preserve brick chimneys in Tokoname. From the results of dynamic tests, the fundamental frequencies of the Howa brick chimney are estimated to be about 3.06 Hz and 2.69 Hz in north-south and east-west directions respectively. The natural modes and damping factors are identified by ARMAV (Autoregressive Moving Average) and ERA (Eigensystem Realization Algorithm) models. As for Model Updating of the Howa brick chimney, IEM (Inverse Eigensensitivity Method) is applied. From the results of model updating, damaged areas are identified and these correspond well to the broken position of static collapse test.