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

Abstract

The invention discloses a progressive method for identifying loose support cable based on strain monitoring during support settlement, which is based on strain 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 diadvantage, 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 througha 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 strain 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 state of the supporting cable system (such as relaxation, damage, etc.) will cause changes in the measurable parameters of the structure, such as the deformation or strain of the cable structure will change. In fact, the change of strain includes the health of the cable system State information, that is to say, the health state of the structure can be judged by using the structural strain data, which can be based on strain monitoring (the present invention refers to the monitored strain as "monitored quantity", and the "monitored quantity" mentioned later refers to the monitored Strain) 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 method solved this problem

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