HEALTH MONITORING UTILIZING THERMAL DEFORMATION FOR BOX GIRDER BRIDGE WITH ORTHOTROPIC DECK SYSTEM

Abstract

In order to utilize the bridge thermal deformation to the health monitoring, the temperatures of the bridge members as well as those deformations due to temperature variation have been monitored continuously over two years at the existing box girder bridge with orthotropic deck system. Those characteristics and relations are, then, investigated.
As the results, it is clarified that the thermal deformations strongly correlate with the temperatures and those relations are very stable for long term. Furthermore, it is shown that the monitoring of thermal deformation has possibility to detect the damage, by extracting the dominant temperature of the members to the deformation and proposing the evaluation method of the correlations.