Earthquake Responses on All Floors in a Building Estimated by Observation Records on Some Restricted Floors

Abstract

The proposed method estimates earthquake responses on all floors in a building by utilizing observation records on some restricted floors. The modal properties are identified by a single-input-multi-output ARX model. Each modal shape is assumed to be a sinusoidal function with two parameters, and the parameters are determined by system identification results. The responses on all floors are evaluated by both the modal shape functions and the corresponding modal responses at the appointed observation floors. The application to the 2011 off the Pacific coast of Tohoku Earthquake observation in a high-rise building shows high effectiveness in structural damage detection.