Condition assessment of Balla Balla River Bridge in Western Australia

摘要

Balla Balla River Bridge in the Pilbara region of WA was selected for condition assessment, with particular attention to be paid to the condition of the shear connectors. Application of local and global vibration methods to a scaled model found that the local vibration approach can detect the artificial damage successfully and consistently by directly comparing vibration responses of the RC slab and girders. A two-day field test on the bridge was carried out, and dynamic properties were extracted. Through both local and global approaches, it was found that the girders are in good condition, slabs are deteriorated and some shear connectors are more flexible than expected.