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This paper is concerned with the dynamic responses of a three-span continuous girder bridge with variable cross-section under moving vehicular loads based on the vehicle--bridge coupled vibration analysis. Numerical simulation is used to study the bridge response. Moreover, the effects of different parameters on dynamic load allowance (DLA) and vibration accelerations of the bridge and the vehicle body are discussed. From numerical results, it has been proved that the pavement roughness is the most important factor. In addition, the tested value of DLA cannot be compared with the design value directly. Also, the speed and weight of vehicles limitation is not always an effective way to ensure the safety of the bridge. It may provide some theoretical basis for the design and evaluation of dynamic bridge performance and these are important factors for the maintenance of bridge operations. [ABSTRACT FROM AUTHOR]

This paper is concerned with the inspection and evaluation methods on dynamic performance of highway bridges under moving vehicular loads. The background and development process of the existing specifications are stated and discussed. Up to now, four specifications or drafts for approval related to dynamic performance inspection and evaluation have been published. The deficiencies of the existing specifications are discussed and the differences among them are compared, including dynamic loading test methods, data processing, and evaluation criteria. Finally, some key research topics about the inspection and evaluation methods on dynamic performance of highway bridges are proposed. [ABSTRACT FROM AUTHOR]