An aerodynamic structure for suppressing wind-induced vibration of steel arch bridges

Abstract

The invention discloses an aerodynamic structure for suppressing wind-induced vibration of a steel arch bridge, which comprises a plurality of air deflector units arranged at intervals on the bottom surface of arch ribs and ventilation guardrails continuously arranged on the top surface of the arch ribs. Adopting this device can disturb the airflow vortex passing above and below the arch rib respectively, and at the same time reduce the influence of excessive wind load caused by setting the wind deflector unit and the guardrail, and improve the structural safety. The ventilation guardrail can also be used as a The handrail of the inspection road is conducive to ensuring the safety of the inspection personnel. Moreover, because the upper and lower structures of the arch rib are different, it can also lead to a great asynchrony of the regenerated upper and lower airflows, reducing wind-induced vibration The possibility of occurrence is especially suitable for the control of vertical wind vibration of long-span steel arch rib structures. It can not only effectively ensure the safety of the bridge during the construction stage, but also avoid the problem of increased cost caused by the application of dampers, and can continue to operate during the operation stage. Suppressing wind vibration has important promotion value.

Description

technical field [0001] The invention relates to the technical field of aerodynamic structures of arch bridges, in particular to an aerodynamic structure for suppressing wind-induced vibration of steel arch bridges. Background technique [0002] With the substantial improvement of material properties and construction and manufacturing equipment, the span of bridges continues to set new records. The arch bridge has a beautiful shape and is easy to assemble and transport. It is one of the preferred bridge types when crossing ravines and rivers. As an important stress-bearing structure of an arch bridge, arch ribs generally have a rectangular or quasi-rectangular cross-section. The structural cross-section is relatively passivated and has poor wind resistance stability. This kind of cross-section will experience wind-induced vibration under certain conditions, which may occur during the construction and operation stages. This will seriously affect the safety and normal use of b...

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Problems solved by technology

[0011] The purpose of the present invention is to overcome the problem that the improvement measures in the prior art are difficult to conveniently and effectively solve the problem of the steel arch bridge, especially the poor wind resistance stability of the upward-supporting arch bridge, so that wind-induced vibration may seriously affect the safety of the bridge during the construction phase and the operation phase To solve the above-mentioned deficiencies of nature, provide an aerodynamic structure for suppressing wind-induced vibration of steel arch bridges

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