Method for identifying loose supporting ropes based on space coordinate monitoring during support settlement

Abstract

The invention relates to a method for identifying loose supporting ropes based on space coordinate monitoring during support settlement, which is based on the space coordinate monitoring and determines whether a mechanical calculation reference model of a structure needs to be updated or not by monitoring the coordinates of a support of the structure. Only when the coordinates of the support of the structure are changed, the mechanical calculation reference model of the structure is updated, thereby obtaining a novel mechanical calculation reference model of the structure, which is reckoned in the support settlement of the structure. On the basis of the model, a change matrix of the unit damage quantity to be monitored is obtained by calculation. According to an approximately linear relationship among the current vector of the strain, the initial vector of the strain, a change matrix of the virtual unit damage strain and the current virtual damage vector, virtual damaged ropes can be calculated and identified, and the residual virtual damaged ropes are just loose ropes, i.e. ropes the rope force of which needs to be regulated after a true damaged rope is distinguished by using a nondestructive examination method, so that the rope length which needs to be regulated can be determined according to a relationship between the looseness degree and the virtual damage degree.

Description

technical field [0001] When there is support settlement, the present invention recognizes the cables to be adjusted in the cable system (referring to all supporting cables) of cable support structures (especially large cable structures, such as large cable-stayed bridges and suspension bridges) based on the monitoring of spatial coordinate equivalents. 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 chang...

AI Technical Summary

Problems solved by technology

[0003] When the health state of the supporting cable system changes (such as relaxation, damage, etc.), in addition to the change of the cable force, it will also cause changes in other measurable parameters of the structure, such as the spatial coordinates of the cable structure. The change of the upper spatial coordinates contains the health status information of the cable system, that is to say, the structural spatial coordinates can be used to judge the health status of the structure, and the monitoring can be based on the spatial coordinates (the monitored spatial coordinates are referred to as "monitored quantities" in the present invention, The "monitored quantity" mentioned later refers to the monitored spatial coordinates) 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) , there is no public and effective health monitoring system and method to solve this problem

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