IDENTIFICATION OF DYNAMIC PROPERTIES OF EXISTING STRUCTURES BY MULTIVARIATE ARMA REPRESENTATION

Abstract

The problem of system identification has become increasingly important in the area of structural engineering, particularly in connection with the assessment of damage and deterioration of existing structures.
In this paper, a method is presented to identify natural frequencies and critical damping ratios of existing structures on the basis of a multivariate ARMA model by appling the Kalman Filter incorporated with a global iteration.
The method is verified by appling it to microtremor records which are measured on a four story reinforced concrete building.