Plate-truss combined steel truss girder bridge flutter and vibration restraining structure

The invention discloses a plate-truss combined steel truss girder bridge flutter and vibration restraining structure. The late-truss combined steel truss girder bridge flutter and vibration restraining structure is arranged to be attached to bridge surface center anti-collision guardrail stand columns, used for increasing the flutter critical wind speed of a large-span combined steel truss girder bridge and characterized in that vertical center stable plates are installed on supporting seats of the two lines of bridge surface center anti-collision guardrail stand columns at intervals with the packing rate S along the center line of a bridge surface main beam, and S is within the range of 60%-80%; and the width of each center stable plate is equal to the separation distance L of every two adjacent center anti-collision guardrail stand columns, and the height D is within the range of 1-1.1 times H. According to the plate-truss combined steel truss girder bridge flutter and vibration restraining structure, throu