Span bridges the overall performance of the anti-abnormal lateral force method of warning

Span bridges overall lateral resistance abnormality alarm method comprising the steps of: (1) the three-dimensional wind field and GPS displacement effect girder span site data acquisition; (2) the collected data vector decomposition and mean treatment , to obtain a sequence of static wind speed and static displacements transverse bridge sequence; (3) sequences for the static and static displacement sequence Winds by month, to determine both the main and related sequences in the same month using wavelet packet number relationship with each other; (4) sequentially Related to the primary sequence of each month Fourier series fit by fitting monthly variation characteristic parameter values ​​for the overall anti-span bridges lateral force performance anomaly warning. One proposed method of the present invention, the overall anti Behavior abnormality warning based side effects large wind load Found span bridges, make up study span bridges abnormal early warning anti property of integral side blank can be of a Span Bridges monitoring and analysis of the overall performance of the anti-force side provide important reference.