A VIBRATION-BASED STRUCTURAL IDENTIFICATION OF A PEDESTRIAN BRIDGE BY 3D SMART ACCELERATION SENSORS AND HIGH RESOLUTION FE MODEL

Abstract

In this study, we conducted fundamental study of structural health monitoring by using 3D smart acceleration sensors and high resolution FE model of a pedestrian bridge.Vibration measurement is performed at a pedestrian bridge having an actual damage by using Imote2 smart sensors. Several vibration modes are identified and compared to eigenvalue analysis of detailed FE model. In FE modeling, stairs restrain girders of the pedestrian bridge and its modal shapes are affected by the connection between stairs and girders. Vibration characteristics of updated FE model are improved in both natural frequencies and mode shapes.