Dynamic Property Analysis of Orthotropic Bridge Deck with Local Fatigue Crack

With the increase in traffic volume and overweight vehicles, fatigue problems are highlighted. Especially for orthotropic steel deck, premature cracks seriously affect service performance, operation, quality of bridge. In this paper, box-girder segment model deck substructure considering several typical were established to reveal variation law on vibration frequency deflection under vehicle traveling load. A natural analysis was performed evaluate change characteristics due localized damage, together with a dynamic that considered The results show initiation propagation have little influence lower modes overall structure great high-order substructure. response bridge changed load as damage progressed. Therefore, it possible identify provide guidance crack detection repair.