Progressive method for identifying loose support cable based on angle monitoring during support settlement

Abstract

The invention discloses a progressive method for identifying loose support cable based on angle monitoring during support settlement, which is based on angle monitoring, and identifies the loose support cable through monitoring a structure support coordinate, taking into account the approximate linear relationship between the current value vector of the monitored-volume and the initial value vector of the monitored-volume, the virtual unit damage monitored-volume value change matrix and the current nominal damage vector. For overcoming the disadvantage, the invention provides the method which means that the linear relationship is segmented to be close to the non-linear relationship, therefore, the virtual damaged cable can be identified; after the real damaged cable is identified through a non-damaged test method, the remained virtual damaged cable is the loose support cable, and the cable length needing adjusting can be determined according to the relationship between the loose degree and the virtual damaged degree.

Description

technical field [0001] When there is support settlement, the present invention recognizes the cable force to be adjusted in the cable system (referring to all supporting cables) of cable-supported structures (especially large-scale cable structures, such as large-scale cable-stayed bridges and suspension bridges) based on the monitoring of angle equivalence. The supporting cable and the specific cable length adjustment amount are given, which belong 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 relaxation and other reasons, the cable force of the supporting cables usually changes after a period of time after the completion of the new structure, and the structure has been in service for a long time. Later, the relaxation of the supporting cables will also cause changes in the cable ...

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 angular coordinates of any imaginary straight line passing through each point of the cable structure (for example, any the change of the angle coordinate of any straight line passing through the point in the tangent plane of a point, or the change of the angle coordinate of the normal line of any point on the surface of the structure), in fact, the change of the structure angle contains the health status information of the cable system, That is to say, the health status of the structure can be judged by using the structural angle data, and can be based on angle monitoring (the present invention refers to the monitored angle data as "monitored quantity", and "monitored quantity" mentioned later refers to the monitored angle data ) to identify damaged cables. The monitored quantity is not only affected by the health status of the cable system, but also affected by the settlement of the cable structure support (which often occurs). At present, there is no public and effective health monitoring system and The method solves this problem

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