A SYSTEM AND A METHOD OF COUNTERACTING WIND INDUCED OSCILLATIONS IN A BRIDGE GIRDER

摘要

a system designed to counteract the wind induced oscillations in a span of the bridge is supported by cables (11) comprises a plurality of long control surfaces (14, 15, 16, 17, 34, 35, 36) which are arranged in a substantially symmetrical to the axis longitud end of the bridge.the surfaces are arranged to control use of wind energy in response to movement of the bridge span in order to reduce the movement. the control surfaces are divided into sections in the longitudinal direction of the bridge, and a plurality of sensors (19, 26) is provided to measure the movement of the bridge span.a local control unit (20, 25) for each section of the face is arranged to control the control unit in response to an address control information to one or more of the sensors.in a method according to the invention, the control surfaces (14, 15, 16, 17, 34, 35, 36) are divided into sections in the longitudinal direction of the bridge, and a plurality of sensors (19, 26) to measure the movement of the bridge span, and a local control unit (20) (25) associated with each section of front controlthe control section of the front control in response to the information from one or more of the sensors.