Progressive method for distinguishing slack supporting cable based on cable force monitoring during support settlement

Abstract

The invention relates to a progressive method for distinguishing a slack supporting cable based on cable force monitoring during support settlement; when the method is used for distinguishing the slack supporting cable based on the cable force monitoring by the coordinates of the support of a monitoring structure, the method considers that the linear relationship between the current numerical value vector of the monitored quantity and the initial numerical value vector of the monitored quantity, the numerical value changing matrix of the virtual unit damage monitored quantity and the current nominal damage vector is approximated; in order to overcome the defect, the invention provides a method which piecewise approximates to the non-linear relationship by using the linear relationship andcan distinguish the virtual damage cable; after the true damage cable is distinguished by using methods such as a nondestructive testing method and the like, the remaining virtual damage cable is theslack supporting cable; and the length of the cable needing to be regulated can be determined according to the relationship between the slack degree and the virtual damage degree.

Description

technical field [0001] When there is support settlement, the present invention identifies the cable system (referring to all supporting cables) in the cable support structure (especially large cable structure, such as large cable-stayed bridge, suspension bridge) that needs to be adjusted based on the monitoring of the cable force equivalent. The supporting cable of force is given, and the specific adjustment amount of cable length is given, which 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 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 ...

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 changes in the supporting cable force. In fact, the change in the cable force includes the health of the cable system Information, that is to say, the health status of the structure can be judged by cable force data, which can be based on cable force monitoring (the present invention refers to the monitored cable force as "monitored quantity", and the "monitored quantity" mentioned later refers to the monitored cable force) 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 systems and methods address this issue

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