Progressive method for recognizing slack cable based on hybrid monitoring during angular displacement of support

Abstract

A progressive method for recognizing a slack cable based on hybrid monitoring during the angular displacement of a support is based on the hybrid monitoring for various kinds of parameters, and takes that the linear relationship between the current value vector of a monitored value and the initial value vector of the monitored value, the change matrix of a virtual unit damage monitored value and a current nominal virtual damage vector are approximate to each other into account while being used for recognizing a slack carrying cable by monitoring the angular coordinates of the structure support. In order to overcome the defect, the invention provides a method of approximating a nonlinear relationship using linear relationship segments, so that virtual damaged cables can be recognized, wherein after actual damaged cables are differentiated therefrom by a method like non-destructive examination and the like, the left virtual damaged cables are slack carrying cables; and a cable length needing to be adjusted can be adjusted according to the relationship between a slack degree and a virtual damage degree.

Description

technical field [0001] When there is an angular displacement of the support (for example, the rotation of the support around the coordinate axes X, Y, and Z is actually the angular displacement of the support around the coordinate axes X, Y, and Z), the invention discloses a progressive method 、Identify the supporting cables in the cable system (referring to all supporting cables) of cable-supported structures (especially large-scale cable-supported structures, such as large-scale cable-stayed bridges and suspension bridges) based on mixed monitoring, and give the specific cable length The adjustment amount belongs to the field of engineering structure safety. Background technique [0002] The cable system is usually a key component of cable structures (especially large cable structures, such as large cable-stayed bridges and suspension bridges). Due to reasons such as relaxation, the cable force of the supporting cables usually changes after a period of time after the compl...

AI Technical Summary

Problems solved by technology

[0003] Changes in the health status of the supporting cable system (such as relaxation, damage, etc.) will cause changes in the measurable parameters of the structure, such as changes in the cable force, which will affect the deformation or strain of the cable structure, and will affect the cable structure. Shape or spatial coordinates that cause changes in the angular coordinates of any imaginary straight line passing through each point of the cable structure (for example, changes in the angular coordinates of any straight line passing through the point in the tangent plane of any point on the surface of the structure, or changes in the angular coordinates of any straight line passing through the point on the surface of the structure Changes in the angular coordinates of the normal at any point), all of these changes include the health status information of the cable system, so the health status of the structure can be judged through the mixed monitoring of the changes in the characteristic parameters of these different types of structures, In the present invention, all the monitored structural characteristic parameters are collectively referred to as "monitored quantities". Since the monitored quantities are composed of different types of measurable parameters of the structure at this time, the present invention calls this mixed monitoring. In addition to the influence of the health status of the cable system, it will also be affected by the angular displacement of the cable structure support (which often occurs). At present, there is no public and effective health monitoring system and method to solve this problem.

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