Effect of Temperature Change on Modal Properties of Plate-Girder Bridges

강판형교의 진동모드특성에 미치는 온도변화의 영향

Monitoring frequency change is a tool to indicate the change ill structural parameters. However, even critical reduction of stiffness is predicted in the range of indication errors due to the effect of temperature on the frequency change. In this study, an experimental work to examine the effect of various temperatures on modal characteristics of steel plate-girders is presented. A model plate-girder used for the experiment is described. Natural frequencies are monitored by using two different excitation sources-impact and shaker. The relation between measurement temperatures and natural frequencies are analyzed.