Reverse buckling cable reinforced large-span suspension bridge and reasonable bridge forming state determination method

Abstract

The invention relates to a reverse buckling cable reinforced large-span suspension bridge and a reasonable finished bridge state determination method. The suspension bridge comprises a support, a main beam arranged on the support, bridge towers arranged on the two sides of the main beam, a main cable structure arranged on the main beam and matched with the bridge towers, and a reverse buckling cable structure arranged below the main beam and matched with the main beam. The reasonable bridge forming state determination method comprises the steps that when the reasonable bridge forming state of the suspension bridge is determined, the acting force of the reverse buckling cable structure is equivalent to the vertical acting force applied to the main cable structure, then the whole is divided into the main cable structure and the reverse buckling cable structure to be considered separately, and the main cable structure and the reverse buckling cable structure are combined after respective balance states are found. Compared with the prior art, the transverse rigidity of the whole structure can be improved through the reverse buckling cable structure, it is ensured that the structure can still be in a normal working state under the action of the maximum wind load, the transverse displacement of the main beam under the action of the wind load is obviously reduced, and the vertical rigidity of the structure under the action of the live load is increased.

Description

technical field [0001] The invention belongs to the technical field of bridge engineering, and relates to a buckle-cable-reinforced large-span suspension bridge and a method for determining a reasonable completed state of the bridge. Background technique [0002] Suspension bridge is a cable load-bearing bridge that is jointly stressed by towers, beams, cables and foundations. It has the characteristics of large spanning capacity, clear force, and good mechanical properties. In recent years, suspension bridges have been more and more widely used in my country. There are a large number of suspension bridges such as Xihoumen Bridge, Runyang Yangtze River Highway Bridge, and Jiangyin Yangtze River Highway Bridge. However, although my country has made great achievements in the construction of suspension bridges, the research on some structural performance needs to be improved. With the continuous increase of the span of the suspension bridge, its torsional stiffness decreases o...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the wind resistance stability problem existing in the traditional suspension bridge structure system, to provide a kind of buckle cable reinforced long-span suspension bridge and a method for determining the reasonable bridge state

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