Wind resisting device for composite beam cable-stayed bridge

Abstract

The invention discloses a wind resisting device for a composite beam cable-stayed bridge and relates to a bridge wind resisting stabilizing device. The wind resisting device comprises an upper stabilizing device and a lower stabilizing device, wherein the upper stabilizing device is installed over a bridge floor, the lower stabilizing device is installed under the bridge floor, and the upper stabilizing device and the lower stabilizing device are longitudinally arranged along the bridge; the upper stabilizing device comprises an upper stabilizing plate and a crash barrier post, and the upper stabilizing plate is installed on a center crash barrier post through a bolt; the lower stabilizing device comprises a lower stabilizing plate, bridge cross beams and a small longitudinal beam, the upper portion of the lower stabilizing plate is installed under the small longitudinal beam under the bridge through a bolt, and the two sides of the lower stabilizing plate are installed between the two bridge cross beams through bolts; the lower stabilizing plate extends downwards to exceed the bottom surface of the bridge cross beams by at least 0.5 m, and the upper stabilizing plate and the lower stabilizing plate are made of windtight fiberglass. The wind resisting device has the advantages that the structure is novel, machining and installation are convenient, vortex-excited resonance is avoided, and bridge building cost is not increased.

Description

technical field [0001] The wind-resistant device of a composite girder cable-stayed bridge according to the invention relates to a wind-resistant and stable device for a bridge. Background technique [0002] Traditional composite girder cable-stayed bridges use air nozzles outside the main girder to improve the aerodynamic parameters of the composite girder so as to play a role in wind resistance and stability. This method has the following disadvantages: 1. Relevant special issues need to be carried out in the preliminary design stage of the bridge Study and determine the rationality and feasibility of the wind resistance measures; 2. The wind resistance measures of the air nozzles increase the bridge width, the structural weight increases, and the project cost increases; 3. The air nozzles are not necessarily applicable to the composite beam cable-stayed bridge, and the composite beam cable-stay When the bridge width is wide, adding air nozzles cannot suppress the occurren...

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Problems solved by technology

[0002] Traditional composite girder cable-stayed bridges use air nozzles outside the main girder to improve the aerodynamic parameters of the composite girder so as to play a role in wind resistance and stability. This method has the following disadvantages: 1. Relevant special issues need to be carried out in the preliminary design stage of the bridge Study and determine the rationality and feasibility of the wind resistance measures; 2. The wind resistance measures of the air nozzles increase the bridge width, the structural weight increases, and the project cost increases; 3. The air nozzles are not necessarily applicable to the composite beam cable-stayed bridge, and the composite beam cable-stay In the case of a wider bridge width, adding air nozzles cannot suppress the occurrence of vortex resonance

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