Problematic cable and support translation identification method based on space coordinate monitoring during temperature change

Abstract

The invention discloses a problematic cable and support translation identification method based on space coordinate monitoring during temperature change. The method comprises the following steps of: based on the space coordinate monitoring, judging whether a mechanical calculation reference model of a cable structure is required to be updated by monitoring temperature of the cable structure and the ambient temperature, obtaining the mechanical calculation reference model of the cable structure by monitoring the temperature of the cable structure and the ambient temperature, and calculating to obtain a unit damage monitored space coordinate unit change matrix on the basis of the model; and calculating noninferior solution of the current nominal damage vector of an evaluated object according to an approximately linear relationship among the current numeric vector and the current initial numeric vector of the monitored space coordinate, the unit damage monitored space coordinate unit change matrix, the unit damage or unit translation displacement vector and the current nominal damage vector of the evaluated object to be solved, and thus rapidly identifying the damaged cable, slack cable and support translation displacement during the temperature change.

Description

technical field [0001] Cable-stayed bridges, suspension bridges, truss structures and other structures have one thing in common, that is, they have many parts that bear tensile loads, such as cable-stayed cables, main cables, slings, tie rods, etc. , cables, or rods that only bear tensile loads are supporting components. For convenience, this method expresses this type of structure as a "cable structure". As the ambient temperature changes, the temperature of the cable structure will also change. When the temperature of the cable structure changes, this method is based on spatial coordinate monitoring to identify damaged cables and loose cables in the support system of the cable structure (for truss structures, it is Refers to the damaged or loose rods that only bear the tensile load) and the translational displacement of the support, which belongs to the field of engineering structure health monitoring. The supporting system of the cable structure refers to all load-bearing ...

AI Technical Summary

Problems solved by technology

In addition to being affected by the health status of the cable structure, the monitored quantity will also be affected by the temperature change of the cable structure (which often occurs). The identification of support cables and support translational displacements with health problems is of great value to the safety of cable structures. At present, there is no public and effective health monitoring system and method to solve this problem.

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