多変量ARMAモデルによる既存構造物の損傷位置の同定

概要

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Periodical monitoring of existing building structures using vibration measurements is useful to identify the occurrence, location and severity of damage. The modal properties, such as natural frequencies, mode shapes and damping ratios, characterize the damage state of existing structures. A multivariate ARMA model is formulated and utilized to identify modal properties at the time of monitoring. The multivariate ARMA model is especially poweful to accurately evaluate mode shapes. Using the identified modal properties, two ways of searching for the location of damage are proposed. One uses the variation in natural frequencies due to damage. The other uses the variation in mode shapes due to damage. Numerical results are presented to illustrate and validate the proposed damage detection method for a multi-story building structure.
一般社団法人日本建築学会の論文
1993-03-20