Measurement of Dynamic Strain of Structure Subjected to Dynamic Load by Using a Couple of Vibratory Gyroscope

Abstract

The hea董 th monitoring ofstructure is to detect the cvmulative da皿 age by the fatigue ofstructure fbr the vibration caused by transportat 孟 on ， wind and earthquake etc ． The signal according to development of fatigue crack shall be detected the displacement ， velocity ， acceleration and dyna皿 ic strain etc ． ． Usually ， the dynamic strain is皿 ensured by using st， rain gauges ， However ， the strain gauges are not suitabie f （ ） r long term 皿 onitoring beca． use the bondi 囗 g material used to attach theln tDstructuTe WiLl become creep f ｛ ）r long ti 皿 e usage ． Then ， f （ ）r eli皿 iコ ating the disadv 艮ntage in vsing strain gauges ， the method to measure the dynamic strai 冂 by vibratory gyroscopes is proposed fbr the health monitoring of structure and the effectiveness is proved through experiments ．