Stayed-cable bridge cable erosion state evaluation method

Abstract

The invention discloses an evaluate method on the abrasion condition of the cable of stayed-cable bridge, comprising that (1) detecting the application condition of cable, (2), accelerating simulating test of cable, to obtain a time-abrasion time-effect curvature in special application condition, (3), based on the result of abrasion-safety simulation analysis, completing the cable abrasion evaluation and service life prediction. Based on prior art, the invention uses accelerated abrasion simulation test, to obtain the abrasion rule of cable, uses simulation analysis to evaluate the abrasion state and predict service life, and provides practical technique.

Description

technical field [0001] The invention belongs to the technical field of bridges, and relates to a cable-stayed bridge, in particular to a method for evaluating the corrosion condition of a cable-stayed bridge. Background technique [0002] As a kind of bridge form, cable-stayed bridge plays an extremely important role in national transportation construction and social development. [0003] The cables of cable-stayed bridges are the main load-bearing structures and life cables, and their durability will directly affect the safety of the whole bridge. However, because the stay cables are exposed to the natural environment for a long time and are subjected to alternating loads, they are extremely susceptible to environmental corrosion, especially those containing a large amount of SO. 4 2- , CO 2 , Cl - and other corrosive substances (such as areas with severe air pollution, areas with severe water pollution). Once the bridge cable system is corroded, it will affect the saf...

AI Technical Summary

Problems solved by technology

However, since the stay cables are exposed to the natural environment for a long time and are subjected to alternating loads, they are extremely vulnerable to environmental corrosion, especially those containing a large amount of SO 4 2- , CO 2 , Cl - areas with corrosive substances (such as areas with severe air pollution, areas with serious water pollution)

Once the bridge cable system corrodes, it will affect the safety and service life of the bridge, and in severe cases, it will cause major safety accidents and huge economic losses

[0004] However, there is a protective cover outside the stay cable, which is inconvenient to open and directly monitor the corrosion status of the stay cable. Therefore, the corrosion monitoring of the stay cable is an international problem. At present, there is no effective method for corrosion evaluation and life prediction of the stay cable.

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